长壁留煤柱法开采煤柱破坏过程数值模拟研究

Numerical simulation on the failure process of coal pillars in longwall remaining coal pillars support mining

针对陕北榆卜界煤矿"采8留7"留区内煤柱与"采12留8"留条带煤柱两种开采方式的煤柱破坏过程进行了数值模拟研究。模拟过程表明:在推进长度一致情况下,条带煤柱的稳定性优于区内煤柱。采用基于煤柱破坏过程数值模拟的方式优化"保水开采"区域采煤方法及开采参数是可行的,该方法为国内外同类型区域其它煤矿的采煤方法及开采参数优化设计提供了有益借鉴。

To further optimize mining methods and parameters in water - preserved mining region in Shanbei mining area, the paper has made numerical simulation of failure process of coal pillar under two kinds of mining method including ＂taking 8 remaining 7＂ leaving the region coal pillars and ＂taking 12 remaining 8＂ leaving strip coal pillars in Yubojie coal mine. Simulation showed that the stability of strip coal pillars is better than the region coal pillars at the same advancing distance. The method can provide a useful reference to mining method and mining parameter optimization for other coal mines with same geological condition.