煤层倾角变化对石门揭煤突出危险性影响的数值模拟研究

Study on Numerical Simulations of Outburst Risk Influence on Cross Cut in Uncovering Coal Seam at Different Dip Angles

理论分析了石门揭煤的突出机理,将卸压区宽度作为石门揭煤突出危险性评价指标。采用FLAC3D软件对煤层倾角为30、45、60°情况下揭煤前围岩应力分布情况、塑性破坏情况及揭煤全过程应力位移演化规律进行数值分析。

A theoretical analysis has identified that the safety width of pressure relief area can be a evaluation index of the outburst risk. Stress distribution before uncovering a coal seam and stress and displacements variation during a cross cut process were simulated in the case of different dip angles of30、45、60° by FLAC3 Dsoftware.