摘要
为了优化防冲设计,实现安全高效开采,采用FLAC数值模拟软件模拟了3上煤解放层的回采对3下煤的解放效果。结果表明:3上煤工作面巷道上下帮应力集中系数达3.3,切眼附近应力集中系数达3.4,工作面前方煤体内应力集中系数达3.5,垂直应力峰值区距工作面煤壁10 m左右;切眼附近走向卸压保护角为72°,工作面前方附近走向卸压保护角为76°,倾斜方向卸压保护角为85°。
To optimize the prevention design of rock burst and achieve safe and efficient mining,FLAC numerical simulation software is used to simulate the pressure-relief effect of 3 upper coal seam to 3 lower coal seam. The result shows that the stress concentration factor in up and down sides of 3 upper coal seam workface roadway is 3. 3,in the region around the cut-hole is 3. 4,in the coal before the working face is 3. 5,the peak value area of vertical stress is 10 meters off working face coal walls; the strike pressure-relief protection angle around the cut-hole is 72°,before the working face is 76°,the dip pressure-relief protection angle is 85°.
出处
《煤矿安全》
CAS
北大核心
2013年第12期150-153,156,共5页
Safety in Coal Mines
关键词
卸压保护角
解放层开采
卸压效果
上解放层
数值模拟
pressure-relief protection angle
liberated layer mining
pressure-relief effect
upper-protective seam
numerical simulation
