急倾斜特厚煤层水平分段开采老顶断裂力学模型

Fracture mechanical model of main roof along inclined for fully-mechanized top-coal caving in steep and extra-thick coal seam

通过对急倾斜特厚煤层水平分段开采老顶破坏特点的分析,建立了老顶沿倾斜方向悬臂梁断裂的力学模型,推导得出老顶岩层悬臂梁能量表达式,提出了爆破断顶矿压防治技术,并在甘肃华亭煤矿试验成功.

Studied the main roof broken character in steep and extra-thick coal seam with horizontally sectioned fully-mechanized top-coal caving, the fracture cantilever model of main roof was established. The cantilever energy formula of main roof was obtained by using fracture mechanics. At last, advanced the burst prevention way of rock burst and arrived success in Huating mine.