摘要
以芦岭煤矿8煤层开采为例,运用FLAC3D软件分析了断层倾向与工作面推进方向在不同情况下,断层带两侧应力分布特征的差异。工作面布设分别在断层上盘逆断层倾向推进和在断层下盘顺断层倾向推进。通过数值模拟分析得出,当逆断层倾向推进的时候(工作面位于断层上盘),随着工作面推进,在断层带上出现应力集中现象,且随工作面继续推进应力集中及影响范围呈增大的趋势,断层带起到了一个阻止应力集中向前传递的作用,应力集中于断层带及上盘上;当顺断层倾向推进的时候(工作面位于断层下盘),随工作面推进,断层带两侧先出现应力减小随后增大,继续推进应力传递到对盘,断层带应力集中程度减小,断层未能限制应力的传递。因此,可以利用此结果,为工作面及巷道位置选择提供依据,避免应力集中对巷道造成破坏,延长巷道服务年限。
Taking 8th Coalseam mining of Luling Colliery as example, flac3d was applied to analyzing difference of mining stress distri- bution characteristics between mining from hanging side and heading side of thrust fault. Results showed that when mining advanced from hanging side, stress concentration occurred within fault zone and concentration degree and range increased with mining ad- vanced. Fault played on stress transmission action. Stress concentrated at heading side. When mining advanced from heading side, stress firstly decreased and then increased at two sides of fault. With mining advanced further, stress transfer to other side, stress concentra- tion degree reduced, fault could not stop stress transmission. Therefore, this could be used to provide basis for mining and roadway lo- cation selection to avoid roadway failure and prolong service time.
出处
《煤矿开采》
北大核心
2013年第5期14-16,37,共4页
Coal Mining Technology
基金
国家自然科学基金项目(41272278)
高等学校博士学科点专项科研基金(20123415110002)
关键词
断层倾向
应力集中
煤层开采
数值模拟
fault dip
stress concentration
coal mining
numerical simulation
