深孔爆破数值模拟及其在煤矿顶板弱化中的应用

Numerical simulation of deep-hole blasting and its application in mine roof weaken

分析了钻孔爆破对岩石的破坏过程,提出了岩石钻孔爆破过程的"动静压"破坏原理.利用AUTODYN软件对钻孔爆破进行数值模拟,得出钻孔爆破的岩石破裂过程.分析了钻孔不耦合装药爆破的规律,实现了理论分析及数值模拟结合到现场实施的煤矿顶板弱化成套技术,用现场钻孔观测爆破裂隙及矿压规律监测方法验证了研究结论.

Analyzed the rock breakage process in borehole blasting, put forward the ＂dynamic and static press＂ breakage principle of rock borehole blasting. Used AUTODYN software make borehole blasting numerical simulation, educed the borehole blasting of rock b law, achieved a complete set of technology mining roof weaken site implementation. At reakage process and analyzed the borehole non-coupling charge blasting by combination of theoretical analysis, numerical simnlation and to the last, verified the condusion of study by drilling observe on-site blasting cracks and monitor the pressure laws.