Results 1 to 10 of about 53,431 (251)

Overburden failure characteristics and fracture evolution rule under repeated mining with multiple key strata control [PDF]

Scientific Reports
To master the overburden structure failure and fracture evolution law under multi-key stratum control during repeated mining in coal seams, this study takes the superimposed mining faces of 6# and 7# coal seams in Xinjiang mining area as the research ...
Sun Chaoshang, Shi Chaoyang, Zhu Zhiming, Lin Haixiao, Li Zhenhua, Du Feng, Cao Zhengzheng, Lu Pengtao, Liu Lin   +8 more
doaj   +3 more sources

Rock Slope Instability Mechanism Induced by Repeated Mining in Mountain Mining Areas

Applied Sciences
When mineral resources are extracted using underground mining methods in hilly regions, landslides or slope failures can be induced frequently. In this study, slope collapse disasters in mountain mining areas were analyzed.
Rong Luo, Guangyue Li, Lu Chen, Ling Zeng, Ke Pei, Xiangxi Yu   +5 more
doaj   +4 more sources

Research on surface subsidence laws and prediction models under repeated mining of multiple coal seams [PDF]

Scientific Reports
With the gradual extension of global coal mining to the deep, the problem of surface subsidence caused by repeated mining of multiple coal seams has attracted much attention.
Shuai Guo, Shouyuan Qiu, Dongjie Zhang, Wenxiang Zheng   +3 more
doaj   +2 more sources

Analysis of coal face stability of lower coal seam under repeated mining in close coal seams group [PDF]

Scientific Reports, 2022
Aiming at the problem of coal face failure of lower coal seam under the influence of repeated mining in close coal seams, with the working face 17,101 as a background, the coal samples mechanics test clarified the strength characteristics of the coal ...
Yu Xiong, Dezhong Kong, Zhijie Wen, Guiyi Wu, Qinzhi Liu   +4 more
doaj   +2 more sources

Study on Failure Characteristics and Control Technology of Roadway Surrounding Rock under Repeated Mining in Close-Distance Coal Seam

Mathematics, 2022
In this study, taking the Sheng’an coal mine as an engineering background, the failure characteristics of the surrounding rock of a roadway under repeated mining in a close-distance coal seam is comprehensively illustrated through field measurements (e.g.
Yuqi Shang, Dezhong Kong, Shijiang Pu, Yu Xiong, Qiang Li, Zhanbo Cheng   +5 more
doaj   +3 more sources

Study on the Law of Fracture Evolution under Repeated Mining of Close-Distance Coal Seams

Energies, 2020
The western region of China is rich in mineral resources. The vigorous development of mineral resources has exacerbated the environmental and safety problems in the region.
Feng Cui, Chong Jia, Xingping Lai, Yanbing Yang, Shuai Dong   +4 more
doaj   +3 more sources

Study on Stress Evolution Law of Overburden under Repeated Mining in Long-Distance Double Upper Protective Layer

Energies, 2022
Upper protective seam mining has been widely applied in China, but the theory of long-distance multiple upper protective seam mining is not yet perfect.
Sheng-Jie Fang, Bing Liang, Wei-Ji Sun, Zhan-Shan Shi, Jian-Feng Hao, Bei-Fang Wang, Xiao-Yong Zhang   +6 more
doaj   +3 more sources

Mechanism and control technology of roadway floor heave deformation and failure under the influence of repeated mining in multiple coal seams [PDF]

Scientific Reports
Deformations caused by of roadway floor heave due to the repeated mining of multiple coal seams is a prominent problem in deep coal mining. This work examines roadway floor heave under the influence of repeated mining in multiple coal seams as the ...
Fu Yuping, Ren Yiming, He Yongliang, Li Chuantian   +3 more
doaj   +2 more sources

Study on the evolution of fractures in overlying strata during repeated mining of coal seams at extremely close distances

Frontiers in Earth Science
In particular, the secondary development of overlying strata fractures can easily lead to the upper goaf, resulting in gas and water gathered in the goaf entering the working face of the lower coal seam through the overlying strata fractures, threatening
Daming Yang, Yun Sun, Jiabo Xu, Linshuang Zhao   +3 more
doaj   +3 more sources

Mechanism of stress transmission and feasibility of mining the lower coal seam under repeated mining in close-multiple coal seams

Frontiers in Earth Science
Mining in an upper coal seam results in the redistribution of vertical stress within a lower coal seam until a new equilibrium state is attained. Close-multiple coal seams mining faces the occurrence of multi-goafs and a complex stress environment. Based
Dapeng Yang, Dapeng Yang, Tiezheng Li, Yang Li, Yuqi Ren   +4 more
doaj   +3 more sources