Results 101 to 110 of about 1,364 (186)

FDEM-based analysis of overlying strata fracture mechanisms and surface subsidence prediction in shallow-buried ultra-thick coal seam mining

Meitan kexue jishu
Shallow buried extra-thick coal seams are widely distributed in the western mining areas of China, due to their shallow burial depth, thin bedrock layers and thick loose layers, and other storage characteristics, in the process of mining both overburden ...
Ran BI, Chaofan YANG, Haozhe HUANG, Jianxi REN, Yongjun SONG, Pengyu ZHU   +5 more
doaj   +1 more source

Mechanical analysis of rock burst induced by fracture and rebound of rock pillar in mining of steeply inclined extra-thick coal seam group

Meitan xuebao
In order to reveal the mechanism of breaking and inducing rock pillars between coal seams in steeply inclined and extra thick coal seam group mining, the mining of steeply inclined and extra-thick coal seam group in Wudong Coal Mine is taken as the ...
Shenghu LUO, Chengyang TIAN, Yongping WU, Panshi XIE, Hongwei WANG, Ding LANG, Zhuangzhuang YAN, Gang HAN, Mingming SUN   +8 more
doaj   +1 more source

Distribution Characteristics of Stress Sources and Surrounding Rock Structure Control Techniques of Gob-Side Entry Driving in Extra-Thick Coal Seam

Advances in Civil Engineering
To address the challenges of surrounding rock control caused by complex stress sources and intense ground pressure in gob-side entry driving (GED) with narrow coal pillars under extra-thick coal seams, this study takes the 10 m-thick coal seam 8204 panel
Dongjie Jiang, Guangzhong Sun, Junjie Guo, Junwen Li, Xing Xu, Qi Ma   +5 more
doaj   +1 more source

Status and Prospects of Underground Thick Coal Seam Mining Methods [PDF]

, 2020
: Australia has very large thick seam coal resources. As a result, there has been ongoing research conducted by UNSW and others into suitable mining methods that are capable of safe, efficient and productive resource recovery.
B K Hebblewhite
core  

Research on Gas Extraction and Cut Flow Technology for Lower Slice Pressure Relief Gas under Slice Mining of Extra-thick Coal Seam. [PDF]

ACS Omega, 2022
Shi Z, Ye D, Hao J, Qin B, Li G.
europepmc   +1 more source

Study on zoning failure characteristics and support technology in water-drenched roadway of thick coal seam

Aiming at the large deformation and difficult control of the thick coal seam roadway under water-drenched conditions, the zoning damage characteristics of thick coal seam water-drenched roadway and the synergistic control mechanism of double arch zoning ...
Hong GAO
core   +1 more source

Instability mechanism of coal pillar in steeply dipping ultra-thick coal seam “segmented and stratified” combined mining

Meikuang Anquan
In order to solve the problems of frequent high energy microearthquakes and large roadway deformation in full-mechanized caving “segmented and stratified” combined mining in Yanbei Coal Mine with large dip angle and extra-thick coal seam, theoretical ...
Yong LIU, Yao YANG, Xiao WANG, Wenqiang WANG, Xuesong WU, Anye CAO, Zujun LU, Tao YANG, Zhanquan WEI   +8 more
doaj   +1 more source

Reduction of Stress Acting on a Thick, Deep Coal Seam by Protective-Seam Mining

, 2017
Aiming to reduce the high mining stress observed in large-space roof structures during mechanized mining of thick coal seams, a control technique based on protective-seam mining is proposed. This technique was used to investigate the 8108 working face of
Hongfei Duan, Rui Gao, Hongchun Xia, Bin Yu   +3 more
core   +1 more source

Applications of Advanced Presplitting Blasting Technology in the Thick and Hard Roofs of an Extra-Thick Coal Seam

Based on the engineering conditions of the 1303 working face in Zhaoxian Coal Mine, this study investigates the characteristics of mine pressure behavior and the stress-relief mechanism of advanced presplit blasting in a working face with a thick and ...
Kai Zhang, Shouguo Wang, Bin Qiao, Shaoze Liu, Yingming Li, Shunjie Huang, Junpeng An   +6 more
core   +1 more source

Study on the Control Effect of Borehole Gas Extraction in Coal Seams Based on the Stress–Seepage Coupling Field

Fire
In order to determine the reasonable parameters of high-gas and extra-thick coal seam drainage, considering the factors of the coal seam metamorphic degree, stress condition, gas occurrence state, and permeability dynamic change, the gas desorption ...
Hongsheng Wang, Huaming An, Bingbing Yang   +2 more
doaj   +1 more source