Results 31 to 40 of about 1,192,587 (115)

Characteristics of Stratum Structure and Fracture Evolution in Stratified Mining of Shallow Buried High-Gas-Thick Coal Seam by Similarity Simulation

Geofluids, 2021
The stratified mining of super thick coal seam is a process of repeated disturbance of the top roof, especially in the lower stratification, the upper complex rock layer has a greater settlement space, resulting in great changes in the strata structure ...
Qin Guangpeng, Cao Jing, Wang Chao, Wu Shuo, Zhai Minghua   +4 more
doaj   +1 more source

Prediction model of coal seam gas content based on ACSOA optimized BP neural network

, 2022
For the problem of coal seam gas content prediction, the influencing factors of coal seam gas content were analyzed by taking No.2 coal seam of Chensilou Coal Mine as the research object.
Prediction model of coal seam gas content based on ACSOA optimized BP neural network
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Mechanism of deformation and pressure relief control of dynamic gob-side entry surroundings in fully-mechanized caving mining for extra-thick coal seam

Meitan kexue jishu, 2023
Affected by the superposition of working face mining, strong rock pressure phenomena such as rock burst and large deformation easily occur in the gob-side entry when mining extra-thick coal seams. Taking the extra-thick coal seam mining of Caojiatan Coal
GAO Yubing, WANG Qi, YANG Jun, DING Weibo, FU Qiang, XU Xiaoding   +5 more
doaj   +1 more source

Mechanism of Rock Bursts Induced by the Synthetic Action of “Roof Bending and Rock Pillar Prying” in Subvertical Extra-Thick Coal Seams

Frontiers in Earth Science, 2021
When studying the rock burst mechanism in subvertical extra-thick coal seams in the Wudong coal mine in Xinjiang, China, most studies focus on rock pillars, while the effect of the roof on rock bursts is usually ignored.
Zhenhua Wu, Zhenhua Wu, Peng-Zhi Pan, Peng-Zhi Pan, Jianqiang Chen, Xudong Liu, Shuting Miao, Shuting Miao, Peiyang Yu, Peiyang Yu   +9 more
doaj   +1 more source

Research on coal pillar width and control of gob side entry with fully-mechanized caving mining in extra thick coal seam

, 2021
In order to study the reasonable width of coal pillar in gob side entry of fully mechanized top coal caving in extra thick coal seam, the 8305 working face is taken as the research object, and the method of theoretical analysis, numerical simulation and ...
LI Yaohui, HE Fulian, QIN Binbin, GUO Jingang   +3 more
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Design on Waterproof Safety Coal Pillar at Outcrop Area of Thick Coal Seam Under he Large Thick Jurassic Red Stratum

, 2020
To study the waterproof coal pillar design for mining in the outcrop area of thick coal seam in Shanxi Formation under the large Jurassic red stratum in the seventh mining area planned and designed by Dongtan Coal Mine, the systematic analysis is carried
XIE Huadong
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Key technology of pressure-relief gas extraction in low dynamic fracture zone of mining overburden in single ultra-thick coal seam

Meitan kexue jishu
Different from the high gas and prominent mining areas in the middle east of China, the mining face of single thick and extra thick coal seam in the western mining area has a large amount of unloading gas and mainly originates from this coal seam, if the
Longyong SHU, Yuanlong ZHANG, Xin SONG, Yongpeng FAN, Yang LI   +4 more
doaj   +1 more source

Formation Mechanism and Detection Method of Overburden Abscission Layer in Mining Coal Seam Under Thick Sandstone

, 2020
In order to study the development characteristics and formation location of mining overburden in thick coal seam under thick sandstone, the overburden movement caused by mining of thick coal seam at 2301 working face in a Datong mine is taken as an ...
NIU Hongwei, GAO Feng, HAN Jinli, WANG Mengchao, CAO Zhenjun
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Analysis of paleoclimatic cycles in the ultra thick coal seam of Yan\u27an Formation in the southern Ordos basin

, 2020
Coal is a climate-sensitive sediment that contains abundant paleoclimate information. In order to find out the paleoclimate information contained in the coal seam and the evolution of its controlling factors, the No.4 thick coal seam in the first member ...
Guoqi, DONG, Qiang, MAO, Lusheng, YIN, Dongdong, WANG, Haiyan, LIU   +4 more
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Evolution characteristics of overburden three zones in fully-mechanized caving face in huge thick coal seam

, 2021
To explore the evolution law of overburden strata during the mining of huge thick coal seams, an experimental study on the distribution characteristics of the overburden three zones with large mining height was carried out.
LIN Haifei, WANG Xuyou, ZHAO Pengxiang, QIU Chunliang, MENG Xiangjun, NING Tingzhou, AN Xuedong, YANG Junsheng, SUN Hongxing, WANG Chao   +9 more
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