Results 31 to 40 of about 1,933 (209)

Coal body structure identification and development effect evaluation based on logging response

Meikuang Anquan, 2021
According to the logging response characteristics of different coal structures, this paper quantitatively identified and described the coal structure in the research area, verified the results by drilling and coring.
LI Quanzhong, ZHAO Lingyun, HU Haiyang
doaj   +1 more source

Slip versus dilation tendency parameter space as a tool for prospecting structurally controlled geothermal systems in greenfield: insights from the greater Ruhr region

Deep Underground Science and Engineering, EarlyView.
This study highlights that with the static and time‐dependent evolution of slip versus dilation tendency parameter space, structurally controlled deep geothermal systems can be selected within areas of higher permeability and lower seismic hazard. Abstract Faults play a vital role in the Earth's hydraulic system by facilitating fluid flow when dilating
Michal Kruszewski, Alessandro Verdecchia, Oliver Heidbach, Rebecca M. Harrington, David Healy   +4 more
wiley   +1 more source

Insights into fundamental problems of rockburst under the modern structure stress field

Scientific Reports, 2022
Rockbursts are some of the most severe dynamic disasters in coal mines. In this paper, the discrimination method of the tectonic stress field is proposed by analyzing the modern stress field in China.
Hai Rong, Nannan Li, Hongwei Zhang, Dequan Sun, Bingjie Huo   +4 more
doaj   +1 more source

Analysis of outburst instability tendency of coal containing methane based on energy theory

Meikuang Anquan, 2022
In order to analyze the influence of unsteady diffusion characteristics of tectonic coal on energy instability, the steady and unsteady gas diffusion models were used to establish the functional relationship between the initial gas diffusion coefficient ...
LU Shouqing, LI Mingjie, SI Shufang, SA Zhanyou, LIU Jie, WANG Chengfeng, BEI Taibiao, SHI Jiang   +7 more
doaj   +1 more source

Real‐time lithology identification while drilling based on drill cuttings image analysis with ensemble learning

Deep Underground Science and Engineering, EarlyView.
A lithology identification while drilling method was developed, integrating an automated cuttings sampling system, a smart drilling rig, and an ensemble learning model. Underground trials achieved 97.42% accuracy in real‐time identification of cuttings lithology and composition, enhancing hazard management and supporting unmanned drilling technology in
Kun Li, Ting Ren, Ningping Yao, Jon Roberts, Haitao Song, Zhongbei Li, Xueqiu He, Liang Zhao   +7 more
wiley   +1 more source

Study on unsteady diffusion characteristics of primary coal and tectonic coal under the influence of pressure and particle size

Meikuang Anquan
In order to further study the characteristics of gas desorption and diffusion in coal, the gas desorption and diffusion experiments of primary coal and tectonic coal with different gas pressures (0.8, 1.3, 2.4, 3.3 MPa) and different particle sizes (0 ...
Shouqing LU, Lurui TAN, Yujin QIN, Zhanyou SA, Jie LIU, Yongliang ZHANG   +5 more
doaj   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Study on mechanical properties and fractal evolution law of containing tectonic coal combination

Meikuang Anquan
To study the mechanical properties of tectonic coal combination specimens, based on the occurrence characteristics of coal seam in a high gas mine, this study carried out the mechanical properties test experiment of loading and fracture process of ...
Qiudong SHAO, Wenbo PEI, Qiping LI, Xingpeng REN, Pengxiang ZHAO, Yanbiao TIAN, Li GUO   +6 more
doaj   +1 more source

Critical expansion points: Mechanical signs of surrounding rock instability

Deep Underground Science and Engineering, EarlyView.
This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen, Chang Deng, Haijun Wang, Lei Tang, Jihong Yu   +4 more
wiley   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source