摘要
以刘庄煤矿171302孤岛面顶板高抽巷为研究对象,在总结现场巷道破坏特征的基础上,分析了巷道围岩稳定性的3个关键影响因素。基于数值模拟,对比了孤岛工作面和侧方位实体煤工作面时顶板高抽巷围岩应力及变形特征,结果表明:孤岛面顶板高抽巷极易向采空侧倾斜下沉,围岩呈非对称性大变形,两帮最大垂直应力集中程度、位置分别扩大了73.2%和1倍,顶底板最大水平应力集中程度分别减小14.5%和54.8%。
The high drainage roadway of 171302 island coal face in Liuzhuang Coal Mine is taken as research object. Based on roadway damage characteristics at the scene,three key factors affecting the roadway stability have been analyzed. Based on numerical simulation,the roadway stress and deformation features under two cases are compared. The results show that roadway above island coal face is easy tilting and sinking to mined side,the surrounding rock is asymmetry large deformation,the maximum vertical stress concentration and position have respectively expanded by 73. 2% and doubled in roadway sides,and the maximum horizontal stress concentration have respectively reduced by 14. 5% and 54. 8% between roadway roof and floor.
出处
《煤矿安全》
CAS
北大核心
2015年第6期200-203,207,共5页
Safety in Coal Mines
关键词
孤岛工作面
高抽巷
围岩
破坏特征
数值模拟
island coal face
high drainage roadway
surrounding rock
failure characteristic
numerical simulation
