摘要
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.
出处
《煤炭技术》
CAS
北大核心
2015年第4期150-153,共4页
Coal Technology
关键词
煤层倾角
石门揭煤
煤与瓦斯突出
卸压区
dip angles
uncovering a coal seam
coal and gas outburst
pressure relief area