Investigation on rational width of coal pillar and roadway support in isolated panel of extra-thick coal seam

被引：4
|
作者：
He, Xiang [1 ,2 ,3 ]
He, Shuxin [1 ,2 ,3 ]
Cai, Yongbo [1 ,4 ]
Xu, Ruiyang [5 ]
Yang, Ke [2 ,3 ]
机构：
[1] Anhui Univ Sci & Technol, Joint Natl Local Engn Res Ctr Safe & Precise Coal, Huainan, Anhui, Peoples R China
[2] Inst Energy, Hefei Comprehens Natl Sci Ctr, Hefei, Anhui, Peoples R China
[3] Anhui Univ Sci & Technol, Sch Min Engn, Huainan, Anhui, Peoples R China
[4] Chinese Inst Coal Sci, Emergency Sci Res Inst, Beijing, Peoples R China
[5] China Univ Min & Technol Beijing, Sch Energy & Min Engn, Beijing, Peoples R China
来源：
FRONTIERS IN EARTH SCIENCE | 2023年 / 11卷
基金：
中国国家自然科学基金;
关键词：
coal pillar; stress and displacement; roadway support; isolated panel; extra-thick coal seam; YIELD PILLAR; SOFT ROCK; FAILURE; DESIGN; STABILITY; STRENGTH; MINE; DEFORMATION;
D O I：
10.3389/feart.2023.1125678
中图分类号：
P [天文学、地球科学];
学科分类号：
07 ;
摘要：
The methods of numerical simulation and on-site measurement is used to analysis reasonable coal pillar width (CPW) and roadway support in isolated panel of extra-thick coal seam. Numerical modeling shows that a maximum vertical stress in isolated panel is 32.9 MPa, and stress concentration factor reaches 2.99, which is more affected by the mining of adjacent panel, and the peak stress on both sides is higher. By comparing the failure and deformation characteristics of different pillar widths, it is shown that a 6 m pillar can reach the load requirements of overlying strata and ensure that the roadway is in an undamaged and controllable environment. According to the asymmetry of surrounding rock deformation, the final joint control technology of asymmetric anchor cables, high intensity anchor cables, and coal pillar grouting is proposed and get good control effect on site. The research results provide guidance value for surrounding rock control under similar geological condition.
引用
收藏
页数：12
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