Numerical simulation on fracturing behaviour of hard roofs at different levels during extra-thick coal seam mining

被引：13
|
作者：
Gao, Rui [1 ]
Huo, Bingjie [2 ]
Xia, Hongchun [3 ]
Meng, Xiangbin [4 ]
机构：
[1] Taiyuan Univ Technol, Coll Min Engn, Taiyuan 030024, Shanxi, Peoples R China
[2] Liaoning Tech Univ, Coll Min Engn, Fuxin 123000, Peoples R China
[3] Dalian Univ, Coll Civil & Architectural Engn, Dalian 116622, Peoples R China
[4] Datong Coal Mine Grp Co Ltd, Datong 037000, Peoples R China
来源：
ROYAL SOCIETY OPEN SCIENCE | 2020年 / 7卷 / 01期
基金：
中国博士后科学基金;
关键词：
hard rock; fracturing behaviour; extra-thick coal seam; impact characteristics; FAILURE; STRATA; PRESSURE;
D O I：
10.1098/rsos.191383
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
In fully mechanized caving mining of extra-thick coal seams, the movement range of overburden is wide, resulting in the breakage of multilayer hard roofs in overlying large spaces. However, the characteristics, morphology and impact effect of hard roofs at different levels are different and unclear. In this study, a secondary development was used in the numerical simulation software ABAQUS, and the caving of rock strata in the finite-element software was realized. The bearing stress distribution, fracturing morphology and impact energy characteristics of hard roofs at different levels were studied to reflect the action and difference of hard roof failure on the working face; thus, revealing the mechanism of the strong ground pressure in stopes, and providing a theoretical basis for the safe and efficient mining of extra-thick coal seams with hard roofs.
引用
收藏
页数：15
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