文献类型：期刊文献

英文题名：Experimental and Theoretical Investigation of Overburden Failure Law of Fully Mechanized Work Face in Steep Coal Seam

作者：Liao, Ze Feng, Tao Yu, Weijian Wu, Genshui Li, Ke

第一作者：Liao, Ze

通信作者：Yu, WJ[1]

机构：[1]Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China;[2]China Univ Min & Technol, Sch Mech & Civil Engn, Beijing 100083, Xuzhou, Peoples R China;[3]Guizhou Inst Technol, Coll Min, Guiyang 550003, Guizhou, Peoples R China

第一机构：Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China

通信机构：corresponding author), Hunan Univ Sci & Technol, Sch Resource & Environm & Safety Engn, Xiangtan 411201, Hunan, Peoples R China.

年份：2020

卷号：2020

外文期刊名：ADVANCES IN CIVIL ENGINEERING

收录：;Scopus(收录号：2-s2.0-85093078599);WOS:【SCI-EXPANDED(收录号:WOS:000581702900002)】；

基金：The authors would like to acknowledge the support and contribution from the School of Resources, Environment and Safety Engineering, Hunan University of Science and Technology, China. This research was funded by the National Natural Science Foundation of China (51274095 and 51974117) and the Natural Science Foundation of Hunan Province (2020JJ4027).

语种：英文

摘要：In this study, both theoretical analysis and similar simulation experiment are employed to investigate the overburden failure law of fully mechanized face in the steep coal seam. By establishing the mechanical model of inclined rock beam, the deflection equation of overlying strata beam is obtained. Based on the geological conditions of Xiangyong coal mine in Hunan Province of China, the laws of roof deformation and failure in steep coal seam are obtained by similar simulation experiments. The results showed that the roof deformation of the goaf is relatively large after the working face advances along the strike, and the deformation mainly occurs in the upper roof of the goaf. The backward gangue in the immediate roof fills the lower part of the goaf, which plays a supporting role in the lower part of the roof and floor. The roof fracture of goaf is located in the middle and upper parts of the working face, which is consistent with the results derived from the mechanical model. After the roof fracture, a "trapezoid" bending fracture area and the secondary stability system area is formed, which is composed of four areas: the lower falling and filling support area, the upper strata bending fracture area, the fracture extension area, and the roof bending sinking area.