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

作　　者：焦汉林[1,2] 杨胜强[1,2] 李贺[1,2] 

机构地区：[1]中国矿业大学煤炭资源与安全开采国家重点实验室,江苏徐州221008 [2]中国矿业大学安全工程学院,江苏徐州221008

出　　处：《煤炭技术》2015年第4期150-153,共4页Coal Technology

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.

关 键 词：煤层倾角 石门揭煤 煤与瓦斯突出 卸压区 

分 类 号：TD713[矿业工程—矿井通风与安全]