摘要
为了提高沿空掘巷的稳定性,采用FLAC3D分别模拟2203与2205工作面3m、5m、6m、8m煤柱宽度时的沿空巷道垂直应力和塑性区分布规律。当煤柱宽度为5m时,煤柱为垂直应力主要承载,且中间部位将出现小范围的弹性区,此时的煤柱变形最为稳定。采用“十字布点”监测沿空巷道围岩变形量可知,5m煤柱能保证巷道稳定性。
In order to improve the stability of the gob side entry driving,FLAC3D is used to simulate the vertical stress and plastic zone distribution of the roadway along the goaf when the coal pillar width is 3m,5m,6m and 8m in 2203 and 2205 working faces respectively.When the width of coal pillar is 5m,the coal pillar is the main bearing of vertical stress,and there will be a small range of elastic zone in the middle part,at this time,the deformation of coal pillar is the most stable.It can be seen from the monitoring of the deformation of the surrounding rock of the roadway along the goaf by"cross point arrangement"that the 5m coal pillar can ensure the stability of the roadway.
作者
张小虎
Zhang Xiao-hu(Production Management Department of Shengtai Company,Jincheng Coal Group,Shanxi Jincheng 048006)
出处
《山东煤炭科技》
2020年第4期20-22,25,共4页
Shandong Coal Science and Technology
关键词
小煤柱
沿空掘巷
模拟
small coal pillar
gob side entry driving
simulate
