陕西煤炭2025，Vol.44Issue(12)：55-62,136,9.DOI:10.20120/j.cnki.issn.1671-749x.2025.1208
不规则孤岛工作面应力演化规律及冲击危险模拟实验研究
Simulated experimental research on stress evolution law and impact risk of irregular island working face
BAI Zhipeng 1CONG Changkui 2LIU Dong1
作者信息
- 1. Shenmu Energy Bureau,Yulin 719300,China
- 2. CCTEG Ecological Environment Technology Co.,Ltd.,Xi'an 710054,China
- 折叠
摘要
Abstract
Affected by factors such as unreasonable mining continuity,geological structure,mine field boundaries,and sur-face structures,there are irregular layouts in the mine working face.During the mining of the irregular island working face,the dynamic pressure of the coal pillar and the working face area presents a risk of frequent shocks with higher levels.Tak-ing the 409 irregular island working face of a certain mine as the engineering background,firstly,according to the spatial structure theory of the overlying rock and the observation value of the surface settlement,the roof stratum structure of the is-land working face is identified and judged;secondly,through numerical simulation,the stress distribution and evolution law of the stope and coal pillar before the face mining are analyzed during the"first square"and"second square",and the po-tential impact hazard area is identified;finally,according to the rock burst cuttings method,the volume of cuttings of the 409 working face is measured during mining.The results show that:the main key layer of the roof overlying rock of the 409 work-ing face has broken,and the overlying rock of the working face has a short"T"structure;the numerical simulation analysis shows that the irregular layout of the working face significantly affects the evolution of the advanced bearing pressure of the working face.The closer the working face advancing to the protective coal pillar,the greater the advanced bearing pressure of the working face,with the peak stress of 30.49 MPa.The drilling cuttings method shows that when mining at the corner of 409 island working face,the risk of impact is higher.关键词
冲击地压/应力演化/数值模拟/孤岛工作面/覆岩结构Key words
rock burst/stress evolution/numerical Simulation/island working face/overlying rock structure分类
矿业与冶金引用本文复制引用
BAI Zhipeng,CONG Changkui,LIU Dong..不规则孤岛工作面应力演化规律及冲击危险模拟实验研究[J].陕西煤炭,2025,44(12):55-62,136,9.
