青洼煤矿沿空巷道应力分布特征与合理煤柱宽度确定

Stress distribution characteristics of roadway along goaf and determination of reasonable pillar width in Qingwa Coal Mine

青洼煤矿为减少煤炭资源浪费,取消工作面区段大煤柱,根据2203与2205工作面实际情况设计小煤柱沿空掘巷。先采用煤柱极限平衡理论计算煤柱宽度,并通过FLAC3D数值模拟软件对不同宽度煤柱下围岩变形进行分析,得出满足工作面掘进和回采期间的煤柱宽度为6 m。

In order to reduce the waste of coal resources and cancel the large coal pillars in the working face section,the small coal pillars and gob-side entry retaining were designed according to the actual situation of 2203 and 2205 working faces in Qingwa Coal Mine.The width of coal pillar was calculated by the theory of limit equilibrium of coal pillar,and the deformation of surrounding rock under different width of coal pillar is analyzed by FLAC3D numerical simulation software.It was obtained that the width of coal pillar during driving and mining of working face is 6 m.