Article
Engineering, Geological
Dexing Li, Enyuan Wang, Xiaojun Feng, Dongming Wang, Xin Zhang, Yunqiang Ju
Summary: It was found that weak currents can be generated from coal and rock materials under a load. Through experiments and field tests, the response characteristics of weak currents to coal failure and mine seismicity were investigated. The results showed that the weak current increases linearly with stress and strain in the elastic deformation stage and can be used as a precursor of coal failure. The weak current measured in an underground coal mine also responds well to mine seismicity, and its continuously accelerated increase can be used as a precursor of mine seismicity.
ENGINEERING GEOLOGY
(2023)
Article
Multidisciplinary Sciences
Yang Liu, Jian-Hua Wang, Cai-Ping Lu, Chao Wang, Hua-Dong Xie, Xian-Yang Yan
Summary: This study investigated the slip and instability mechanisms of coal-rock parting-coal structures under uniaxial loading conditions using experiments and case verification. The findings are relevant for the early warning of coal-rock dynamic disasters in coal mines.
SCIENTIFIC REPORTS
(2022)
Article
Engineering, Geological
Lukasz Wojtecki, Sebastian Iwaszenko, Derek B. Apel, Miroslawa Bukowska, Janusz Makowka
Summary: This study uses machine learning algorithms to assess the rockburst hazard in a hard coal mine. The decision tree and neural network models are proven to be effective in distinguishing rockbursts from tremors with high accuracy.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2022)
Article
Energy & Fuels
Xianggang Cheng, Wei Qiao, Hu He
Summary: This study proposes a mining-induced seismicity information quantification method based on the fractal theory to assess coal burst risk (CBR). A deep learning framework for CBR prediction is constructed using deep learning methods and evaluated using statistical evaluation indicators. The reliability and validity of the research results are verified through a case study in the Gaojiapu coal mine.
GEOMECHANICS AND GEOPHYSICS FOR GEO-ENERGY AND GEO-RESOURCES
(2023)
Article
Geochemistry & Geophysics
Shuang Gong, Yi Tan, Wen Wang
Summary: The study proposed a deep neural network prediction model based on dropout and improved Adam algorithm for accurate and reliable coal bump prediction. The model demonstrated effectiveness and correctness in predicting coal bump disasters, providing a scientific basis for similar projects.
Article
Geochemistry & Geophysics
Shuai Ren, Guofeng Yu, Yong Luo, Dechao Lu
Summary: This study explores the prevention and control effect of superhigh-water backfilling mining on rockburst using theoretical analysis, numerical simulation, and field monitoring. The main influencing factors for inducing rockburst are determined to be mining depth, mechanical properties of coal and rock mass, overburden conditions, geological structure, and roadway layout of the working face. It is found that superhigh-water backfilling mining can effectively reduce the energy accumulation degree of coal seams and prevent the occurrence of impact dynamic disasters.
Article
Engineering, Geological
Yi Duan, Yiran Shen, Ismet Canbulat, Xun Luo, Guangyao Si
Summary: This study utilized machine learning methods to classify spatially clustered seismic events in underground mines, achieving classification accuracy of over 91%, with deep convolutional neural network (DCNN) using seismogram images as inputs showing the best performance.
JOURNAL OF ROCK MECHANICS AND GEOTECHNICAL ENGINEERING
(2021)
Article
Environmental Sciences
Jinrong Cao, Linming Dou, Heinz Konietzky, Kunyou Zhou, Min Zhang
Summary: This paper investigates the mechanism and control strategy of mining-induced seismicity-triggered coal bursts (MISTCB) based on a severe MISTCB that occurred in China. A large-scale numerical model is built to analyze the crack development and stress evolution of the MISTCB, as well as the effect of mining-induced seismicity amplitude. The study reveals that seismicity plays a key role in MISTCB, and increasing amplitude leads to higher dynamic stresses, ejection velocities, and deformations.
ENVIRONMENTAL EARTH SCIENCES
(2023)
Article
Geosciences, Multidisciplinary
Jinrong Cao, Linming Dou, Jiang He, Guangan Zhu, Zhengyi Wang, Jinzheng Bai, Zepeng Han
Summary: With the increase in mining depth, coal bursts in steeply inclined and extra thick coal seams have become a major challenge for safe mining. A numerical model was developed to analyze a coal burst triggered by mining induced seismicity. The model was calibrated and validated using laboratory results and field observations. The study analyzed stress evolution, crack development, and ejection velocity patterns, and discussed the impact of mining induced seismicity vibration velocity on coal bursts. The findings provide guidance for preventing and controlling coal bursts in steeply inclined and extra thick coal seams.
FRONTIERS IN EARTH SCIENCE
(2023)
Article
Engineering, Geological
Jie-Fang Song, Cai-Ping Lu, Chun-Hui Song, Xiu-Feng Zhang, Yi-Qing Wang, Feng-Ling Liu, Yang Liu
Summary: Mining-triggered tremors have a significant impact on the safety of coal mine operations. This study used Bayesian full-waveform inversion and simulation to analyze the relationship between roadway layout, syncline, and rockburst accidents in the Xinjulong coal mine. The results showed that event #14 triggered a strike-slip rockburst, with stress-increase zones at both ends of the fault plane, indicating an increased risk of rockbursts in those areas. The study also found that the stability of sources near the roadway was mainly influenced by event #14 within a distance of 60 meters, while sources further than 60 meters were primarily affected by the Liuhai syncline.
ROCK MECHANICS AND ROCK ENGINEERING
(2023)
Article
Geochemistry & Geophysics
Zong-long Mu, Jing Yang, Guang-jian Liu, Yu-chen Zhang, Jian-hang Jiao
Summary: The coal seam bifurcation area (CSBA) is an important region in coal measure strata that is prone to coal bursts. Through analyzing coal burst cases in CSBA, it was found that the angle and range of CSBA are the main factors influencing the slip of geological weak surfaces (GWS).
Article
Energy & Fuels
Dariusz Chlebowski, Zbigniew Burtan
Summary: Mining-induced seismicity plays a crucial role in determining rockburst hazard levels in underground mines. Assessment methods in Polish collieries include seismic and seismoacoustic techniques, borehole surveys, and analyses of geological conditions. Analytical forecasts of stress states are recommended for planning mining operations in high hazard zones. Analysis of seismic test data and stress forecasts can effectively predict and verify rockburst hazard conditions in mining practices.
Article
Environmental Sciences
Gregor Uranjek, Milena Horvat, Radmila Milacic, Janez Roser, Joze Kotnik
Summary: This manuscript describes a robust quantification of odorous emissions of mine sources and a model-based analysis aimed to establish a better understanding of the sources, concentrations, dispersion, and possible control of odorous compounds during coal extraction process. The analysis reveals that dimethyl sulphide (DMS) is the major odour active compound present in the mine, released from coal extraction locations and during transport from the coal transport system. Dispersion simulations show that ventilation regulation alone is not sufficient as an odour abatement measure.
ENVIRONMENTAL MONITORING AND ASSESSMENT
(2023)
Article
Engineering, Environmental
Ningbo Zhang, Zong-Xian Zhang, Renliang Shan, Qingxin Qi, Shankun Zhao, Zhongxue Sun, Yanshuang Guo
Summary: In order to investigate the fault slips mechanism in coal mines in China, a biaxial shear experiment was conducted on fault F16 in Yima city. The experiment included slip tests on a rock sample and a non-slip-test sample for comparison. The results showed that three fault slips occurred during the experiment, with the first slip showing the greatest variation in shear stress and strains. Shear strains near the ends of the fault had more significant variations than in the middle part, and the sliding displacement during the first slip was 29.89 mu m. The microstructures on the fault surface also differed between the slip-test sample and the non-slip-test sample.
BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
(2023)
Article
Acoustics
Xiaoqian Zhang, Heng Zhang, Chengmin Wei
Summary: The study simulated mine earthquakes using explosive blasting and verified the method with actual monitoring data. As the source energy of mine earthquakes increased, the damage to bolts mainly occurred at the front and stress wave superposition effect deepened the damage. Bolts in the middle of the lane and roof were significantly affected, highlighting the need for strengthened support in those areas. Additionally, a more economical and effective support scheme was proposed based on safety factor and supporting effects of different schemes.
SHOCK AND VIBRATION
(2021)