Results 91 to 100 of about 3,077,132 (240)

Macroscopic failure characteristics and seepage pattern of damaged goaf-side coal pillars under confined water accumulation

Meitian dizhi yu kantan
BackgroundThe method of supporting roadways using small coal pillars has been widely applied in China. As a result, the stability of goaf-side coal pillars affects mining safety.
Weitao LIU, Dongqi CHEN, Yuben LIU, Yanhui DU, Jiyuan ZHAO   +4 more
doaj   +1 more source

Simulation experiment on the structural evolution and damage-deterioration mechanism of boundary coal pillars under immersion in abandoned mines [PDF]

In coal mine production, water-proof coal pillars are reserved to prevent water hazards from old goaf areas. However, under long-term pressurized immersion of aggressive mine water accumulated in abandoned goaf areas, both macroscopic and mesoscopic ...
Yajun SUN, Weining LU, Shijie XIONG, Huiqing YUAN, Yuhang HAN, Zhimin XU, Tianci CHEN   +6 more
core   +1 more source

Damage and energy characteristics of coal rock combinations with inclined coal seams under axial loading

Scientific Reports
A single load compression test of rock-coal-rock assemblages (RCRs) containing coal bodies with different inclinations was carried out with the research background of mining deep, large-steep coal seams. It was found that the larger the inclination angle of the coal body in the RCR samples, the larger the compaction stage of the samples and the smaller
Xuanhong Du, Wulin Lei, Hengyan Zhang, Zhaohui Wen, Ruirui Zhao, Zhiheng Chen, Lan Yu, Chao Zheng, Jinhe Liu, Erjun Xing, Shengling Jiang, Rili Yang, Juheng Cao   +12 more
openaire   +3 more sources

Anisotropic Damage Mechanism of Coal Seam Water Injection with Multiphase Coupling

ACS Omega
After coal seam water injection, coal mechanical properties will change with brittleness weakening and plasticity enhancement. Aiming at the problem of coal damage caused by the coal seam water injection process, based on nonlinear pore elasticity theory
Yuehui Liang, Biming Shi, Jiwei Yue, Chengcheng Zhang, Qijun Han   +4 more
semanticscholar   +1 more source

Study on the strength deterioration characteristic and damage model of coal pillar dams with repeated water immersion in underground reservoirs

Scientific Reports
The continuous operation of coal mine underground reservoirs exposes the coal pillar dams to mining disturbances and prolonged water immersion, resulting in the deterioration of coal pillars' mechanical properties and posing a serious threat to the dam ...
Beifang Wang, Duo Zhou, Jing Zhang, Bing Liang   +3 more
semanticscholar   +1 more source

Insight into the Creep Damage Evolution in Water-Immersed Coal Pillars: Experiment and Numerical Model Investigation

Energies
Coal mine underground reservoirs play a significant role in energy utilization while also contributing to energy security. Prolonged immersion in mine water reduces the long-term strength of coal, subsequently leading to continuous creep damage in coal ...
Xueliang Li, Sihai Yi, Zheng Chen, Qingbiao Guo, Xiangjun Cai, Xin Guo, Haiyang Yi   +6 more
doaj   +1 more source

Modeling Coal Seam Damage in Cast Blasting [PDF]

, 1998
A discrete element computer program named DMC_BLAST (Distinct Motion Code) has been under development since 1987 for modeling rock blasting (Preece & Taylor, 1989). This program employs explicit time integration and uses spherical or cylindrical elements
Chung, S.H., Preece, D.S.
core  

An experimental study on the synergic damage of chemical solutions and stress to coal

Scientific Reports
This paper investigates the impact of treatment with chemical solutions of varying pH values on the micro-macroscopic damage in coal samples under load, employing a combination of Small Angle X-ray Scattering (SAXS) experiments and uniaxial compression tests.
Yaoyu Shi, Xiangchun Li, Xiaowei Li, Haonan Song, Xuefei Zhuo, Jianhua Zeng, Zhenzhong Li, Qingdong Qu   +7 more
openaire   +3 more sources

Study on Influence of Soft Coal Interlayer on Mechanical Properties of Coal Under Uniaxial Compression

, 2020
In order to explore the influence degree and law of soft structure coal interlayer on the uniaxial compression mechanical parameters and failure mode of primary coal samples, based on the macro-scopic mechanical parameters obtained from the indoor test ...
FENG Kangwu
core   +1 more source

Effects of coal damage on permeability and gas drainage performance

, 2016
Coal permeability is a measure of the ability for fluids to flow through coal structures. It is one of the most important parameters affecting the gas drainage performance in underground coal mines.
Zhongwei Chen, Aminossadati, Saiied, Zheng, Chunshan, Mehmet Kizil, Kizil, Mehmet, Saiied Aminossadati, Chunshan Zheng, Aminossadati, Saiied M., Chen, Zhongwei, Kizil, Mehmet S.   +9 more
core   +1 more source