Engineering › Safety, Risk, Reliability and Quality

Geoscience and Mining Technology

Works Count: 68643

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Description

This cluster of papers covers advancements in mining technology, safety measures, and risk assessment related to coal mining. It includes topics such as water inrush, coal seam stability, fuzzy comprehensive evaluation, directional drilling, geological conditions, gas outburst, and numerical simulation.

Keywords

Mining Technology; Water Inrush; Coal Seam; Safety Evaluation; Fuzzy Comprehensive Evaluation; Directional Drilling; Geological Conditions; Risk Assessment; Gas Outburst; Numerical Simulation

Orogenesis and dynamics of the Qinling Orogen

1996-05-20

Guowei Zhang , Qing‐Ren Meng , Zaiping Yu +3 more

The Tancheng-Lujiang wrench fault system

1994-08-01

Rob Westaway

Logistic regression and neural network classification of seismic records

2013-05-24

Javier Vallejos , Stephen D. McKinnon

A Novel Approach for Blast-Induced Flyrock Prediction Based on Imperialist Competitive Algorithm and Artificial Neural Network

2014-01-01

Aminaton Marto , Mohsen Hajihassani , Danial Jahed Armaghani +2 more

Flyrock is one of the major disturbances induced by blasting which may cause severe damage to nearby structures. This phenomenon has to be precisely predicted and subsequently controlled through the … Flyrock is one of the major disturbances induced by blasting which may cause severe damage to nearby structures. This phenomenon has to be precisely predicted and subsequently controlled through the changing in the blast design to minimize potential risk of blasting. The scope of this study is to predict flyrock induced by blasting through a novel approach based on the combination of imperialist competitive algorithm (ICA) and artificial neural network (ANN). For this purpose, the parameters of 113 blasting operations were accurately recorded and flyrock distances were measured for each operation. By applying the sensitivity analysis, maximum charge per delay and powder factor were determined as the most influential parameters on flyrock. In the light of this analysis, two new empirical predictors were developed to predict flyrock distance. For a comparison purpose, a predeveloped backpropagation (BP) ANN was developed and the results were compared with those of the proposed ICA-ANN model and empirical predictors. The results clearly showed the superiority of the proposed ICA-ANN model in comparison with the proposed BP-ANN model and empirical approaches.

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Exploration geophysics of the shallow subsurface

1992-01-01

Henry Robert Burger

Approaching the subsurface seismic exploration fundamental considerations seismic exploration - the refraction method, the reflection method electrical resistivity exploration using using gravity exploration using the magnetic method. Approaching the subsurface seismic exploration fundamental considerations seismic exploration - the refraction method, the reflection method electrical resistivity exploration using using gravity exploration using the magnetic method.

A geological assessment method of floor water inrush risk and its application

2012-06-22

Zhaoping Meng , Guoqing Li , Xiaotong Xie

Current situation and comprehensive utilization of iron ore tailing resources

2006-07-01

Shuo Zhang , Xue Xiang-xin , X. Liu +5 more

Real-time computerized tomography (CT) experiments on sandstone damage evolution during triaxial compression with chemical corrosion

2003-12-04

Xia‐Ting Feng , Sili Chen , Hui Zhou

Fracture and flow of rocks under high triaxial compression

1971-02-10

Kiyoo Mogi

A new triaxial compression technique has made possible the study of laws of the fracture and flow of rocks under general triaxial stress states, in which all three principal stresses … A new triaxial compression technique has made possible the study of laws of the fracture and flow of rocks under general triaxial stress states, in which all three principal stresses are different. By this new method, the effects of the stress states on fracture and yielding of rocks were experimentally studied. Fracture and flow properties of rocks are markedly affected not only by the least compression σ3, but also by the intermediate compression σ2. The stress states that produce fracture and yielding are determined by the following formulas: (1) (2) where ƒ1 and ƒ2 are monotonic increasing functions. The new failure criteria, corresponding to the generalized von Mises criteria, are physically interpreted as follows: fracture or yielding will occur when the distortional strain energy reaches a critical value that increases monotonically with the effective mean pressure: (σ1 + σ3)/2 for fracture and (σ1 + σ2 + σ3)/3 for yielding. The ductility defined as the permanent strain just before fracture, markedly increases with the increasing σ3 but decreases with increasing σ2. The influences of σ2 and σ3 on ductility are just the opposite. From these results on the effect of stress states, fracture and flow properties of the earth's upper mantle were deduced.

Cavability control by hydraulic fracturing for top coal caving in hard thick coal seams

2015-01-21

Bingxiang Huang , Youzhuang Wang , Shenggen Cao

Overview on the application of geophysics in coal mining

2013-02-18

Peter Hatherly

Electrochemical Studies of Coal Slurry Oxidation Mechanisms

1982-08-01

P.M. Dhooge , David E. Stilwell , Su‐Moon Park

Oxidation of a coal slurry solution at platinum electrodes in strong acidic media has been studied in detail. The results indicate that the iron ions leached out from coal are … Oxidation of a coal slurry solution at platinum electrodes in strong acidic media has been studied in detail. The results indicate that the iron ions leached out from coal are responsible for major anodic currents. The Fe(II) is electrolytically oxidized to Fe(III) at the anode, which oxidizes coal to various products including

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A New Method to Eliminate AC Harmonic Currents by Magnetic Flux Compensation-Considerations on Basic Design

1971-09-01

Hiroshi Sasaki , T. Machida

A new method of eliminating ac harmonic current is proposed, which is based on the principle of the magnetic flux compensation in a transformer core. By means of the new … A new method of eliminating ac harmonic current is proposed, which is based on the principle of the magnetic flux compensation in a transformer core. By means of the new method, abnormal harmonics as well as normal harmonics can effectively be dealt with. Considerations on the basic design of the new method are given.

Investigations of water inrushes from aquifers under coal seams

2005-02-18

Jincai Zhang

The effects of stress and fracturing on permeability of coal

1986-04-01

Şevket Durucan , J.S. Edwards

Prevention and treatment technologies of railway tunnel water inrush and mud gushing in China

2013-11-12

Yong Zhao , Pengfei Li , Siming Tian

Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be … Water inrush and mud gushing are one of the biggest hazards in tunnel construction. Unfavorable geological sections can be observed in almost all railway tunnels under construction or to be constructed, and vary in extent. Furthermore, due to the different heights of mountains and the lengths of tunnels, the locations of the unfavorable geological sections cannot be fully determined before construction, which increases the risk of water inrush and mud gushing. Based on numerous cases of water inrush and mud gushing in railway tunnels, the paper tries to classify water inrush and mud gushing in railway tunnels in view of the conditions of the surrounding rocks and meteorological factors associated with tunnel excavation. In addition, the causes of water inrush and mud gushing in combination of macro- and micro-mechanisms are summarized, and site-specific treatment method is put forward. The treatment methods include choosing a method of advance geological forecast according to risk degrees of different sections in the tunnel, determining the items of predictions, and choosing the appropriate methods, i.e. draining-oriented method, blocking-oriented method or draining-and-blocking method. The treatment technologies of railway water inrush and mud gushing are also summarized, including energy relief and pressure relief technology, advance grouting technology, and advance jet grouting technology associated with their key technical features and applicable conditions. The results in terms of treatment methods can provide reference to the prevention and treatment of tunnel water inrush and mud gushing.

The effect of proppant embedment upon the long-term conductivity of fractures

2006-10-25

Qingzhi Wen , Shicheng Zhang , Lei Wang +2 more

Application of three-phase foam to fight an extraordinarily serious coal mine fire

2006-02-01

Fubao Zhou , Wanxing Ren , Deming Wang +3 more

Influence of aggregate size on fracture process zone of concrete detected with three dimensional acoustic emission technique

1991-09-01

Hirozo Mihashi , Noriaki Nomura , S. Niiseki

Case Histories of Four Extremely Intense Rockbursts in Deep Tunnels

2012-01-02

Chuanqing Zhang , Xia‐Ting Feng , Zhou Hui +2 more

Groundwater as an environmental constraint of longwall coal mining

2006-02-25

Colin J. Booth

Risk assessment of floor water inrush in coal mines based on secondary fuzzy comprehensive evaluation

2012-03-29

Yi Wang , Weifeng Yang , Ming Li +1 more

The application of a coupled artificial neural network and fault tree analysis model to predict coal and gas outbursts

2010-09-19

Ruilin Zhang , I.S. Lowndes

A note on correlation clusters and cluster search methods

1944-09-01

Raymond B. Cattell

Impact of karst water on coal mining in North China

2005-10-21

Gongyu Li , Wanfang Zhou

Risk assessment of water inrush in karst tunnels based on attribute synthetic evaluation system

2013-06-06

Shucai Li , Zongqing Zhou , Liping Li +3 more

The Impact of Inrush Currents on the Mechanical Stress of High-Voltage Power Transformer Coils

2001-10-01

M. Steurer , K. Fröhlich

From failure experience on power transformers very often it was suspected that inrush currents, occurring when energizing unloaded transformers, were the reason for damage. In this paper it was investigated … From failure experience on power transformers very often it was suspected that inrush currents, occurring when energizing unloaded transformers, were the reason for damage. In this paper it was investigated how mechanical forces within the transformer coils build up under inrush compared to those occurring at short circuit. 2D and 3D computer modeling for a real 268 MVA, 525/17.75 kV three-legged step up transformer were employed. The results show that inrush current peaks of 70% of the rated short circuit current cause local forces in the same order of magnitude as those at short circuit. The resulting force summed up over the high voltage coil is even three times higher. Although inrush currents are normally smaller, the forces can have similar amplitudes as those at short circuit, with longer exposure time, however. Therefore, care has to be taken to avoid such high inrush currents. Today controlled switching offers an elegant and practical solution.

Fuzzy logic-based relaying for large power transformer protection

2003-07-01

Myong-Chul Shin , Chul-Won Park , J. S. Kim

Power transformer protective relay should block the tripping during magnetizing inrush and rapidly operate the tripping during internal faults. The frequency environment of power system has been made more complicated … Power transformer protective relay should block the tripping during magnetizing inrush and rapidly operate the tripping during internal faults. The frequency environment of power system has been made more complicated and the quantity of 2nd frequency component in inrush state has been decreased because of the improvement of core steel. Then, traditional approaches will likely be maloperated in the case of magnetizing inrush with low second harmonic component and internal faults with high second harmonic component. This paper proposes a new relaying algorithm to enhance the fault detection sensitivities of conventional techniques by using a fuzzy logic approach. The proposed fuzzy-based relaying algorithm consists of flux-differential current derivative curve, harmonic restraint, and percentage differential characteristic curve. The proposed relaying was tested with relaying signals obtained from Salford EMTP simulation package and showed a fast and accurate trip operation.

Infra-Red Spectroscopic Study of the Dehydration of Montmorillonite and Saponite

1964-01-01

James Russell

A B S T R A C T: The more firmly held water which is directly co-ordinated to the exchangeable cations in smectites is clearly distinguished by infra-red spectroscopy from … A B S T R A C T: The more firmly held water which is directly co-ordinated to the exchangeable cations in smectites is clearly distinguished by infra-red spectroscopy from the more labile water in outer spheres of co-ordination. Li+, Ca2+ and MgZ+ retain both types of water to higher temperatures than do K+, Na+ and NH~+, and the former group give stable monohydrates in saponite which are probably not completely decomposed till 400-600~ K-, Li- and Na-saponite rehydrate completely after heating, but NH4- , Mg- and Ca-saponite are irreversibly dehydrated at 600-700~ by which temperature NH4+ is also decomposed. NH4-, Li- and Mg-montmorillonite fail to rehydrate after heating to 350~ and changes in their spectra indicate interaction between the exchangeable cations and the lattice. Decomposition of NHa+ gives H-montmorillonite, but the products from Li- and Mgmontmorillonite are also acidic, and give spectra similar to that of Hmontmorillonite. Na- and Ca-montmorillonite do not rehydrate after heating to 500-550~ and K-montmorillonite rehydrates only partially in the range 350-550~ Dehydration of saponite and montmorillonite at low temperatures causes changes in lattice vibrations which are reversed on rehydration. The spectra of the products of dehydroxylation of montmorillonite and saponite are slightly affected by the exchangeable cation originally present.

Factors controlling permeability-porosity relationships in magma

2001-11-01

J. D. Blower

Hazard evaluation of coal and gas outbursts in a coal-mine roadway based on logistic regression model

2015-11-10

Zhonghui Li , Enyuan Wang , Jianchun Ou +1 more

Theory framework and technological system of coal mine underground reservoir

2015-01-01

GU Da-zha

In western China( Shanxi,Shaanxi,Inner Mongolia,Ningxia and Gansu),there are rich coal resources,while there are also water resource shortage. A surface evaporation capacity is above six times of rainfall. The largescale,intensive,modern coal … In western China( Shanxi,Shaanxi,Inner Mongolia,Ningxia and Gansu),there are rich coal resources,while there are also water resource shortage. A surface evaporation capacity is above six times of rainfall. The largescale,intensive,modern coal mining can result in the formation of crack,destroy the original underground water system,and the generation of lots of mine water. In order to ensure the underground production safety,mine water is traditionally discharged to the surface. However,due to large evaporation capacity in the western area,the discharged mine water can quickly be evaporated and is therefore lost after being discharged. Therefore,a technical approach of storage and utilization of mine water using underground reservoirs of coal mine was proposed,which included design,construction and operation technology. The technical system is composed of water resource prediction,reservoir site selection,reservoir capacity design,dam construction,safety guarantees,water quality control,etc. Currently,32 coal mine underground reservoirs has been established in Shendong Mining Area,which can provide 95 percent of total water consumption,and been in operation safely with a low cost. It is shown that the underground coal mine reservoir is a safe,economical and scaled water storage technology,using natural underground space and natural rock purification,which could be of great significance in the protection and utilization of underground water resources for coal mining in the western mining area of China.

ROCK RHEOLOGICAL MECHANICS AND ITS ADVANCE IN ENGINEERING APPLICATIONS

2007-01-01

Sun Jun

The recent development in some aspects on the research of rock rheology and its engineering applications are discussed;the main contents are listed as follows:a comprehensive introduction of the rock engineering … The recent development in some aspects on the research of rock rheology and its engineering applications are discussed;the main contents are listed as follows:a comprehensive introduction of the rock engineering rheology problems,laboratory as well as in-situ study on the soft rock and rock mass of rich growth with joints and fissures,identification of rheological models and their parameters estimation,applications of rheological mechanics to the convergence-confinement method and its applications to the design optimization of tunnel structures,nonlinear rheological behavior of tunnel surrounding rocks in high earth stress region and its mechanical effect of tunnel lining-support,study on rock rheological damage and fracture mechanics.Besidest,his paper gives a brief discussion on the rheology problem in soil mechanics and soil engineering.Finally,several understandings on the research work are presented in prospect of the rheological mechanics in geotechnical engineering in the future.

Control of coal and gas outbursts in Huainan mines in China: A review

2016-05-21

Liang Yuan

Coal extraction in Huainan area is basically characterized by one of typical multi-seam mining conditions observed in China, where coal is mined in soft seams characterized by high gas content, … Coal extraction in Huainan area is basically characterized by one of typical multi-seam mining conditions observed in China, where coal is mined in soft seams characterized by high gas content, high stress, low permeability and difficult geological conditions. The average mining depth in Huainan area is 875 m and continues to increase by 15–25 m annually. The rise in mining depth increases the risk of coal and gas outbursts and makes it more difficult to control outburst risk in Huainan coalmines. This paper reviews the main achievements (e.g. theories, technologies and equipment) in outburst control in Huainan, and tries to analyze some key challenging issues, and to present associated strategies to address these issues. It suggests that the outburst control in Huainan must take a combination approach of both regional and localized control in which the former plays a dominant role. Other outburst prevention principles include (1) non-outburst seams protecting outburst seams, (2) less outburst-prone seams protecting strong outburst-prone seams, (3) stress-releasing mining, and (4) the combination of ground and underground gas drainage (the model is dubbed as "walking on two legs"). The paper concludes that we should conduct fundamental researches on outburst mechanism, and develop outburst control technologies and equipment to ensure safe and efficient coal mining of deep coal resources in Huainan area.

Mechanism of water inrush in tunnel construction in karst area

2016-05-10

Liping Li , Wenfeng Tu , Shaoshuai Shi +2 more

With the rapid developing trend of long, large and deep construction characteristics for underground engineering in the world, China has the largest number of karst tunnels with the wide scales … With the rapid developing trend of long, large and deep construction characteristics for underground engineering in the world, China has the largest number of karst tunnels with the wide scales and great difficulties. As the hydrogeological conditions are becoming unprecedentedly complex, water inrush disaster becomes the bottleneck problem for the further development of traffic tunnels. Based on the statistical analysis of a large number of cases of water inrush in karst tunnels, influence factors of water inrush have been put forward from the view of karst hydrogeological factors and engineering disturbance of human factors. Karst hydrogeological factors include geological defect, strata dip, formation lithology, landform and underground level. Human factors of engineering disturbance include excavation and reinforcement geological prediction, monitoring and measurement of surrounding rock. It also introduces some geological disasters caused by the water inrush in tunnel excavation. In terms of the formation of water inrush channel, water inrush types are divided into geological defects inrush, non-geological defects inrush and the combination. Conclusions will be beneficial to further research on hazards control of underground construction.

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Set pair analysis for risk assessment of water inrush in karst tunnels

2016-07-21

Yingchao Wang , Hongwen Jing , Liyuan Yu +2 more

Feasibility of ICA in approximating ground vibration resulting from mine blasting

2016-08-30

Danial Jahed Armaghani , Mahdi Hasanipanah , Hassan Bakhshandeh Amnieh +1 more

A principal component analysis/fuzzy comprehensive evaluation model for coal burst liability assessment

2015-11-28

Wu Cai , Linming Dou , Guangyao Si +3 more

Effects of Coal Mining on Shallow Water Resources in Semiarid Regions: A Case Study in the Shennan Mining Area, Shaanxi, China

2016-09-22

Wei Qiao , Wenping Li , Tao Li +2 more

Nonlinear Control of Induction Motor

1987-07-01

Z Krzemiński

Monitoring, Warning, and Control of Rockburst in Deep Metal Mines

2017-08-01

Xia‐Ting Feng , Jianpo Liu , Bingrui Chen +3 more

This paper reviews the recent achievements made by our team in the mitigation of rockburst risk. It includes the development of neural network modeling on rockburst risk assessment for deep … This paper reviews the recent achievements made by our team in the mitigation of rockburst risk. It includes the development of neural network modeling on rockburst risk assessment for deep gold mines in South Africa, an intelligent microseismicity monitoring system and sensors, an understanding of the rockburst evolution process using laboratory and in situ tests and monitoring, the establishment of a quantitative warning method for the location and intensities of different types of rockburst, and the development of measures for the dynamic control of rockburst. The mitigation of rockburst at the Hongtoushan copper mine is presented as an illustrative example.

Ground Subsidence and Surface Cracks Evolution from Shallow-Buried Close-Distance Multi-seam Mining: A Case Study in Bulianta Coal Mine

2019-01-10

Xuelin Yang , Guangcai Wen , Linchao Dai +2 more

The current situation and prevention and control countermeasures for typical dynamic disasters in kilometer-deep mines in China

2019-02-16

Xiangjun Chen , LI Li-yang , Lin Wang +1 more

Prediction of Blast-Induced Ground Vibration in an Open-Pit Mine by a Novel Hybrid Model Based on Clustering and Artificial Neural Network

2019-03-01

Hoang Nguyen , Carsten Drebenstedt , Xuan-Nam Bui +1 more

On two-scale dimension and its applications

2019-01-01

Qura Tul Ain , Ji‐Huan He

Dimension or scale is everything. When a thing is observed by different scales, different results can be obtained. Two scales are enough for most of practical problems, and a new … Dimension or scale is everything. When a thing is observed by different scales, different results can be obtained. Two scales are enough for most of practical problems, and a new definition of a two-scale dimension instead of the fractal dimension is given to deal with discontinuous problems. Fractal theory considers a self-similarity pattern, which cannot be found in any a real problem, while the two-scale theory observes each problem with two scales, the large scale is for an approximate continuous problem, where the classic calculus can be fully applied, and on the smaller scale, the effect of the porous structure on the properties can be easily elucidated. This paper sheds a new light on applications of fractal theory to real problems.

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Atlas of Mylonites- and related microstructures

2009-01-01

Rudolph Allard Johannes Trouw , Cees W. Passchier , Dirk J. Wiersma

Sediment of acid mine drainage Targeted loci environmental

2019-01-01

Thomasgbif

Sediments from an ancient gold mine in La Carolina, San Luis, Argentina. Sediments from an ancient gold mine in La Carolina, San Luis, Argentina.

EXPERIMENTAL STUDY ON THE CRYSTALLIZATION FORMATION MECHANISM OF BLIND PIPE IN WUJIAYUAN TUNNEL

2025-06-25

Haiting Wang , Haifeng Xu , Pengfei Huo +5 more | Studia Universitatis Babeș-Bolyai Chemia

Research on the Construction of a National Coal Mine Gas Basic Information Database

2025-06-23

Jun Liang | Frontiers in Sustainable Development

With the rapid development of China's coal industry, coal mine safety issues have become increasingly prominent, particularly frequent gas accidents, posing severe threats to lives and property. Based on the … With the rapid development of China's coal industry, coal mine safety issues have become increasingly prominent, particularly frequent gas accidents, posing severe threats to lives and property. Based on the construction project of the National Coal Mine Gas Basic Information Database, this paper explores in depth the application value and technical implementation of this database in coal mine safety management. By analyzing the database's construction objectives, overall design, and functional implementation, the study aims to provide a scientific reference for coal mine safety management and informatization development.

Research on Prominent Early Warning Technology based on Dynamic Characteristics of Gas Emission

2025-06-23

Jianren Fan | Frontiers in Sustainable Development

This paper elaborates in detail on the construction process and application effects of the prominent early warning technology and system based on the dynamic characteristics of gas emission in Xiayukou … This paper elaborates in detail on the construction process and application effects of the prominent early warning technology and system based on the dynamic characteristics of gas emission in Xiayukou Coal Mine. In response to the frequent occurrence of coal and gas outburst disasters in Xiayukou Coal Mine, an early warning indicator system was constructed based on the dynamic characteristics of gas emission, and an early warning system was developed. This system enables real-time monitoring and early warning of coal and gas outburst hazards at the working face. Field applications have demonstrated that the system operates stably and reliably, with a high accuracy rate in early warning, thus providing a strong guarantee for the safe production of the coal mine.

Research on Enhancing Underground Coal Seam Gas Drainage Effect through Surface Fracturing Drilling

2025-06-22

Zhendong Zhang | Frontiers in Science and Engineering

In response to the characteristics of high gas content and low permeability coal seams in Coal Mine, a systematic study was conducted to improve the underground coal seam gas drainage … In response to the characteristics of high gas content and low permeability coal seams in Coal Mine, a systematic study was conducted to improve the underground coal seam gas drainage effect using surface fracturing drilling technology. The focus was on examining the impact of surface fracturing drilling on various indicators before and after fracturing of the underground coal seam, including permeability, gas pressure and content, gas drainage concentration, drainage volume and pure volume, gas emission rate, and the K1 value. A quantitative analysis was carried out to investigate the influence of surface fracturing drilling on the underground coal seam gas drainage effect. The results indicate that surface fracturing drilling significantly enhances the permeability of coal seams, effectively reduces gas pressure and content, increases gas drainage concentration and pure volume, decreases gas emission rate, and mitigates the risk of coal and gas outbursts.

Application Research of Microseismic Monitoring Technology in Coal Mine Excavation Face

2025-06-20

Bing Li | Scientific Journal of Technology

To address dynamic hazards such as coal and gas outbursts and rockbursts during deep mining, this study takes a certain Coal Mine as the research subject. A mine-wide microseismic monitoring … To address dynamic hazards such as coal and gas outbursts and rockbursts during deep mining, this study takes a certain Coal Mine as the research subject. A mine-wide microseismic monitoring network was established using the Polish SOS microseismic monitoring system. By collecting, transmitting, and processing microseismic data in real time, the spatiotemporal distribution characteristics of microseismic events were analyzed. A dynamic hazard early warning model was developed based on the microseismic data, and targeted prevention measures were formulated in combination with the warning model. The results show that: Real-time microseismic monitoring and early warning effectively detected and mitigated multiple potential dynamic hazards. The early warning model provided sufficient time for the implementation of preventive measures. And the targeted prevention measures significantly improved mine safety and production efficiency. Practical applications demonstrate that this research has high practical value and broad applicability.

The Development and Prospect of Intelligent Technology in China's Coal Mines

2025-06-20

Sizhuo Wang | Academic Journal of Science and Technology

With the development of science and technology, the coal industry has also ushered in a new look. In order to ensure the production capacity and employee safety of coal mines … With the development of science and technology, the coal industry has also ushered in a new look. In order to ensure the production capacity and employee safety of coal mines and conform to the high-quality development path in the 14th Five-Year Plan, coal mines are now moving towards intelligence. Intelligent technology in coal mines not only greatly improves work efficiency, but also ensures the safety of coal miners' lives, which is strongly supported by the state and is accelerating development under the impact of 5G technology. This paper summarizes the development status of intelligent coal mine technology in China in recent years from three aspects: intelligent mining, monitoring and management technology, and looks forward to the development trend of intelligent coal mine technology in the future, so as to point out the direction for the construction of intelligent coal mines in the future and escort high-quality development.

Water-Richness Evaluation of Sandstone Aquifer Based on Set Pair Analysis Variable Fuzzy Set Coupling Method: A Case Study on Bayangaole Mine, China

2025-06-19

Kaihua Liang , Ye Li , Yuanlin Bai +5 more | Water

The Jurassic aquifer in Northwest China is the key aquifer for mine water filling, which is significant due to its loose structure, large porosity, strong rock permeability, and fracture development … The Jurassic aquifer in Northwest China is the key aquifer for mine water filling, which is significant due to its loose structure, large porosity, strong rock permeability, and fracture development characteristics. In addition, the water richness in space is extremely uneven, and many coal mine roof water inrush events are closely related to it. A case of evaluation of water-richness of the roof sandstone in the 3-1 coal seam of the Bayangaole minefield was analyzed in depth, and the evaluation index system is established based on lithology and structural characteristics. Specifically, the evaluation indexes are under the influence of the influencing factors of lithology, the density of fault intersection endpoints, and the density of fault scale and the strength of folds as the influencing factors of structure. On this basis, the set pair analysis-variable fuzzy set coupling evaluation method is introduced to form a targeted water-rich evaluation model of a roof sandstone aquifer. By using the coupling method of set pair analysis and variable fuzzy set, a targeted evaluation model is formed to realize the organic integration of indicators. Through the comprehensive analysis of the relative zoning of water abundance and the data from the borehole pumping (drainage) test, the distribution of water abundance grade in the study area is clarified.

Leveraging ensemble learning and neural networks enhancing underground mine roof safety

2025-06-16

Jitendra Pramanik , Arun Kumar Sahoo , Abhaya Kumar Samal +1 more | Safety in Extreme Environments

Identification of Rock Mass Discontinuity Sets Based on Density Peak Algorithm and Fuzzy C-Means Algorithm

2025-06-16

Qiong Wu , Qianqian Kang , Huiming Tang +7 more | Rock Mechanics and Rock Engineering

Application of Seismic Frequency Resonance Technology for Karst Detection at Qingshuitang Wollastonite Mining Area of Hezhou, South China

2025-06-13

Xiaoli Gou , Shehong Li , Yu He +7 more | Journal of Environmental & Earth Sciences

Karst caves are among the most common and critical geological hazards in karst regions. Due to their marked differences in physical properties compared to the surrounding rock, they can be … Karst caves are among the most common and critical geological hazards in karst regions. Due to their marked differences in physical properties compared to the surrounding rock, they can be detected using various geophysical techniques. Karsts have developed on the surface of the Qingshuitang Wollastonite Mining Area in Huangtian Town, Hezhou City, Guangxi Province. In line with mine safety production requirements, a professional assessment of the potential development of karst caves must be conducted within 150 m of the mining area's surface. Following an on-site investigation and comparison with traditional geophysical methods, seismic frequency resonance technology (Seismic FRT) was selected for detection due to its convenience, flexibility, cost-effectiveness, and rapid data acquisition capabilities. Contour maps of the apparent wave impedance and geological profiles along the survey lines were obtained through data collection and processing. In combination with surface karst and mining geology, 32 karst caves (hidden danger points) and 15 karst development zones were identified. Drilling verification was conducted at the A428 and B122 anomalous points on the A1 # and B1 # survey lines. The verification results were consistent with the inferred depths and maximum apparent wave impedance anomalies, confirming that Seismic FRT is a feasible and effective method for detecting hidden karst development areas in mines.

Study on the prediction of coal spontaneous combustion tendency based on the particle swarm optimization algorithm optimized the xgboost model

2025-06-13

Ping Zou , Yu‐Xin Ye , Wanying Zhou +3 more | International Journal of Coal Preparation and Utilization

Enhancing Ground Vibration Prediction in Mine Blasting: A Committee Machine Intelligent System Optimized with Metaheuristic Algorithms

2025-06-12

Mahdi Hasanipanah , Hassan Bakhshandeh Amnieh | Natural Resources Research

Coal Mine Water Inflow Prediction Model Based on Multi-Factor Pearson Correlation Analysis

2025-06-12

Liang Ma , Z Liu , Weiming Chen +4 more | Applied Sciences

Since geological structures around coal mines are complex, sudden coal mine water inflow is seriously threatening coal mining safety. To improve the accuracy of predicting coal mine water inflow, a … Since geological structures around coal mines are complex, sudden coal mine water inflow is seriously threatening coal mining safety. To improve the accuracy of predicting coal mine water inflow, a multi-source dataset is collected to develop a coal mine water inflow prediction model based on multi-factor Pearson correlation analysis, where a convolutional neural network and bidirectional long short-term memory neural network are adopted to extract features from time-series data. To validate the performance of the present prediction model, a case study is conducted, where the predicted coal mine water inflow is close to the collected coal mine water inflow. Meanwhile, compared to other prediction models, the present prediction model can predict the magnitude and development trend of coal mine water inflow in the next 8 h more accurately, where the mean absolute percentage error is 5.76% and the correlation coefficient is 0.922.

Research on shale TOC prediction method based on improved BP neural network

2025-06-05

Chaorong Wu , Kaixing Huang , Z. T. Sun +5 more | Scientific Reports

Development and application of advanced learning models for predicting the land subsidence due to coal mining

2025-06-05

Shirin Jahanmiri , Majid Noorian-Bidgoli | Scientific Reports

Multi-Scale, Multi-Method Observation and Modeling of Structure-Flow Relationships in Karst Fault Zones

2025-06-02

Aurélie Boura , Hugo Pyriere , Yohann Cousquer +1 more | ARPHA Conference Abstracts

Karst aquifers, while critical for water resources, are highly vulnerable due to their rapid pollution transfer pathways through complex internal structures, including karst networks, fault zones, and fractures. Identifying parameters … Karst aquifers, while critical for water resources, are highly vulnerable due to their rapid pollution transfer pathways through complex internal structures, including karst networks, fault zones, and fractures. Identifying parameters influencing the organization and genesis of these systems, emphasizing their impact on groundwater flow dynamics, are key point to understand processes and overcome associated issues. Through a multidisciplinary approach combining structural geology, electrical geophysics and hydro(geo)logical monitoring, the morphological and structural interactions between fault zones and karst networks could be highlighted. By integrating hydrodynamic data, including hydraulic head and flux measurements, the study provides new insights into the influence of fault structures on karstification and flow patterns. The high-density spatial and temporal acquisition of these structural and dynamic elements enables to: better understand stucture/dynamic interactions, obtain input data for statistical conduit generation, obtain validation data for simulation and definition of generated conduits. better understand stucture/dynamic interactions, obtain input data for statistical conduit generation, obtain validation data for simulation and definition of generated conduits. The results form a robust foundation for improving karst modeling by better constraining structural and parametric representations. These advancements enable more strategic and effective understanding, simulation and management of these vulnerable water resources.

Frequency Domain Analysis and Suppression Measures of Ferroresonance in 35kV New Energy Access Station

2025-06-01

Jing Wang , Yanhua Han , Hao Wu +1 more | Journal of Physics Conference Series

Abstract As the new power system has become the development trend of the power grid, the proportion of photovoltaic power stations in the power system has increased, and the characteristics … Abstract As the new power system has become the development trend of the power grid, the proportion of photovoltaic power stations in the power system has increased, and the characteristics of its output voltage wide band and high frequency have led to frequent fusing accidents of PT fuses induced by ferroresonance, which are significantly different from those of traditional ferroresonance. However, the existing research has not revealed its frequency domain characteristics, and the parameter configuration of traditional suppression measures is not fully applicable. In view of the above problems, this paper takes a 35kV new energy access station in China as the research object, builds the electromagnetic transient simulation model of the system, obtains the ferroresonance waveform, determines the harmonic component of photovoltaic power generation that has the most significant influence on the ferroresonance through fast Fourier decomposition, and comparatively analyzes the difference between the ferroresonance of the new energy access station and the traditional ferroresonance frequency domain. The parameter optimization suggestions of suppression measures are given.

The prediction method for ground surface settlement of pipe jacking tunnels based on a spatiotemporal transfer learning network

2025-06-01

Hairong Huang , Lian Yuan , Jian Chen +1 more | AIP Advances

Surface settlement induced by ground disturbances during pipe-jacking tunnel construction poses a persistent risk, with progressive deformation potentially leading to surrounding structural collapse. Accurate settlement prediction provides advance risk warning … Surface settlement induced by ground disturbances during pipe-jacking tunnel construction poses a persistent risk, with progressive deformation potentially leading to surrounding structural collapse. Accurate settlement prediction provides advance risk warning and enables proactive deformation risk control through construction parameter optimization. Conventional deformation control is based on simplified analytical models, numerical simulations, and field monitoring, while the effectiveness is constrained by theoretical assumption and sparse field monitoring data. The Long Short-Term Memory-Convolutional Neural Network model with Transfer Learning (LSTM-CNN-TL) is proposed to achieve settlement prediction under data-scarce conditions. The LSTM module captures long-range temporal dependencies in settlement sequences, while the CNN extracts spatial correlations and inter-feature interactions across monitoring points. Transfer learning is implemented through historical data pretraining followed by fine-tuning on target project data, enabling cross-project domain adaptation and improved generalization with limited monitoring input. The LSTM-CNN-TL model is evaluated on a soft soil pipe-jacking project. Comparative experiments against multiple baseline models across various evaluation metrics demonstrate its consistent superiority in prediction accuracy, robustness, and adaptability under limited monitoring conditions.

Graph isomorphism wavelet convolutional networks for small-sample fault diagnosis of rotating machinery using multi-sensor information fusion

2025-06-01

Lei Gao , Zhihao Liu , Qinhe Gao +4 more | Expert Systems with Applications

Effect of oil-soluble transition metal catalysts containing Fe, Co or Ni on direct liquefaction behavior of Shangwan coal

2025-06-01

Zhi Li , Yuxin Wen , Rui Zhang +4 more | Journal of Fuel Chemistry and Technology

Research on the Prediction of Coercivity in Sintered NdFeB Magnets Based on Feature Selection

2025-06-01

Jindong Li , Xu Sun , Rui Han +1 more | Chinese Rare Earths

Retraction notice to "Rapid identification model of mine water inrush source using random forest optimized by multi-strategy improved sparrow search algorithm" [Heliyon 10 (2024) e35708]

2025-06-01

Jierui Ling , Zhibo Fu , Kailong Xue | Heliyon

Peer Review Statement

2025-06-01

| Journal of Physics Conference Series

All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a … All papers published in this volume have been reviewed through processes administered by the Editors. Reviews were conducted by expert referees to the professional and scientific standards expected of a proceedings journal published by IOP Publishing. • Type of peer review: Single Anonymous • Conference submission management system: Morressier • Number of submissions received: 44 • Number of submissions sent for review: 0 • Number of submissions accepted: 42 • Acceptance Rate (Submissions Accepted / Submissions Received × 100): 95.5 • Average number of reviews per paper: 0 • Total number of reviewers involved: 0 • Contact person for queries: Name: Wang ming Email: [email protected] Affiliation: Zhongneng National Research Institute (Beijing) Electric Power Research Institute

Hydrogeochemical Signatures and Spatiotemporal Variation of Groundwater Quality in the Upper and Lower Reaches of Rizhao Reservoir

2025-05-29

Youcheng Lv , Xiaodong Li , Jie Yuan +7 more | Water

Groundwater is crucial for human survival and social development. In this study, ArcGIS 10.8, Origin 2024, and Excel were employed to investigate the hydrochemical properties of groundwater in the Rizhao … Groundwater is crucial for human survival and social development. In this study, ArcGIS 10.8, Origin 2024, and Excel were employed to investigate the hydrochemical properties of groundwater in the Rizhao reservoir (RZR) through statistical analysis, Durov plots, ion ratio analysis, and the entropy weight water quality index (EWQI). The analysis is based on monitoring data from six sites located both upstream and downstream of RZR, focusing on dynamic changes in groundwater quality and major ion concentrations. The findings suggest that the groundwater in RZR exhibits weak alkalinity and is categorized as hard freshwater. The predominant anion and cation are HCO3− and Ca2+, which together determine that the dominant water chemistry type in RZR is HCO3-Ca type. Groundwater ions predominantly stem from the dissolution of silicate and evaporite rocks. In comparison to the dry season, the fluctuations in groundwater parameters are more pronounced during the wet season. Between 2020 and 2022, the concentrations of most ions exhibited an upward trend. Notably, nitrate (NO3−) experienced significant fluctuations and relatively high concentrations, peaking in the wet season of 2023. The primary source of nitrate in RZR is agricultural activities. Overall, the quality of groundwater in RZR is good and suitable for human consumption. Nevertheless, the EWQI values are increasing at most monitoring sites, with the most significant rise observed at site R02. Moreover, while the upstream monitoring point exhibits better water quality, its EWQI value has increased significantly, and ion concentrations display substantial fluctuations. Local authorities are advised to adopt active measures to manage groundwater quality in RZR to ensure its sustainable use.

Research on early warning model of coal spontaneous combustion based on interpretability

2025-05-29

Huimin Zhao , Xu Zhou , Jingjing Han +3 more | Scientific Reports

Predicting the temperature of the coal spontaneous combustion (CSC) is essential for preventing and managing coal mine fires. In this paper, a Rough Set-Stacking-SHapley Additive Explanations (RS-Stacking-SHAP) prediction model of … Predicting the temperature of the coal spontaneous combustion (CSC) is essential for preventing and managing coal mine fires. In this paper, a Rough Set-Stacking-SHapley Additive Explanations (RS-Stacking-SHAP) prediction model of CSC based on grid search optimized is proposed. Compared with the traditional machine learning model, the model has better prediction accuracy and generalization ability. Based on the data collected from experimental coal samples in Lijiahao Coal Mine, rough set algorithm was used for attribute approximation to identify O2, CO, CH4, C2H4, C2H6, C3H8, CO/CH4, C2H4/C2H6 as the model indexes, thereby establishing the system of warning indexes for spontaneous combustion of coal. XGBoost, SVR, RF, LightGBM and BP models were selected as base models to establish an early warning model for CSC based on the stacking integration architecture. The grid search algorithm was utilized to optimize the model parameters, ensuring the selection of the most suitable parameter configurations. The dataset was then divided into the training and test sets in a 7:3 ratio, and the extracted indicators of each gas were used as inputs to the model and the temperature was used as outputs. The mean absolute error (MAE), root mean square error (RMSE), r-square (R2), mean absolute percentage error (MAPE), weighted mean absolute percentage error (WMAPE) and variance account for (VAF) were chosen to evaluate the results. The predictive performance of the model was compared with that of the individual base models, and the results displayed that the R2 value of the RS-Stacking model was 0.991, representing improvements of 12.7%, 14.1%, 0.6%, 3.5% and 17.7% over the XGBoost, SVR, RF, LightGBM, and BP models, respectively. GS-RS-Stacking was considered to be the best model, where MAPE = 5.14%, WMAPE = 3.76%, VAF = 99.08%, MAE = 5.081, RMSE = 6.461, close to the ideal value. Finally, we used SHAP to provide global feature interaction interpretation and local interpretation for the model, analyzing the contributions of CH4, C2H6, C3H8, and CO to the model's predictive outcomes. The results show that the model proposed in this paper has better prediction effect and robustness for temperature of CSC.

Prediction of surrounding rock parameters and optimization of support in tunnel crossing fault fracture zones

2025-05-28

Jiazheng Chen , Shuqi Ma , Ao Liu +3 more

Abstract The tunnel crosses the fault fracture zone characterized by highly fractured surrounding rock (SR), making it difficult to accurately determine SR parameters, which affects tunnel construction design. An improved … Abstract The tunnel crosses the fault fracture zone characterized by highly fractured surrounding rock (SR), making it difficult to accurately determine SR parameters, which affects tunnel construction design. An improved GASA-BP inverse analysis algorithm is proposed, which synergistically combines the Genetic Algorithm (GA), Simulated Annealing (SA), and Backpropagation (BP) neural network to enhance the prediction accuracy of SR mechanical parameters. The algorithm utilizes the GA's efficient optimization ability, the SA's global convergence capability, and the BP's strong nonlinear fitting performance to establish the mapping relationship among various parameters under the scenario of tunneling through fault fracture zones. The algorithm was applied to predict the SR mechanical parameters at the Yiliang Tunnel crossing the fault fracture zone. The results indicate that the GASA-BP algorithm exhibits superior overall inversion accuracy compared to both the BP and GA-BP algorithms. It achieves accurate and rapid predictions of SR parameters within a reasonable range. Based on the inverse determination of the SR mechanical parameters, grouting reinforcement optimization in the fractured zone section is proposed to control the SR deformation. By comparing the SR displacement, plasticity zone, and the distribution range of the maximum shear strain increment, the grouting reinforcement zone with a thickness of 3 m and a length of 30 m was determined to be more appropriate. This study provides valuable references for the accurate prediction of SR parameters and the optimization of grouting reinforcement zones in tunnels crossing fault fracture zones.

Research on Grouting Dynamic Monitoring Based on Borehole–Tunnel Joint Resistivity Method

2025-05-27

Cheng Wang , Lei Zhou , Liangjun Yan +1 more | Applied Sciences

To address the challenge of dynamic monitoring during grouting operations in coal mine fault zones under pressurized mining, this study proposes the Borehole–Tunnel Joint Resistivity Method (BTJRM). By integrating three-dimensional … To address the challenge of dynamic monitoring during grouting operations in coal mine fault zones under pressurized mining, this study proposes the Borehole–Tunnel Joint Resistivity Method (BTJRM). By integrating three-dimensional (3D) electrode arrays in both tunnels and boreholes with 3D resistivity inversion technology, this approach enables fully automated underground data acquisition and real-time processing, facilitating comprehensive dynamic monitoring of grout propagation. A case study was conducted on a coal mine fault grouting project, where tunnel and borehole survey lines were deployed to construct a 3D cross-monitoring network, overcoming the limitations of traditional 2D data acquisition. Finite volume method and quasi-Gauss–Newton inversion algorithms were employed to analyze dynamic resistivity variations, enhancing spatial resolution for detailed characterization of grout migration. Key findings include: (1) Grout diffusion reduced resistivity by 10%, aligning with electrical response patterns during fracture-filling stages; (2) 3D inversion reveals that grout propagates along the principal stress axis, forming a “Y”-shaped low-resistivity anomaly zone that penetrates the fault structural block and extends into roadway areas. The maximum planar and vertical displacements of grout reach 100 m and 40 m, respectively. Thirty days post-grouting, resistivity recovers by up to 22%, reflecting the electrical signature of grout consolidation; (3) This method enables 3D reconstruction of grout diffusion pathways, extends the time window for early warning of water-conducting channel development, and enhances pre-warning capabilities for grout migration. It provides a robust framework for real-time sealing control of fault strata, offering a novel dynamic monitoring technology for mine water inrush prevention. The technology can provide reliable grouting evaluation for mine disaster control engineering.