数码雷管露天深孔微差爆破网络数值模拟

以河北司家营露天矿场为研究对象，研究数码雷管精准延期的深孔露天微差爆破，提出可增大爆破效果、减少爆破振动危害的微差爆破网络，并利用非线性动力分析软件LS-dyna模拟4种不同方案的露天深孔微差爆破。结果表明：采用菱形布孔，孔间间隔单炮孔爆破地震波的半周期，S型串联起爆顺序的微差爆破网络，在水平距离起爆点3 m~18 m处，比原矿场爆破方案下的有效应力增大24.8%；在水平距离爆源25 m~200 m处，比原矿场爆破方案在X方向爆破振速峰值减小，即爆破振动危害减小；模拟结果对类似露天深孔爆破工程设计及实践具有一定的参考意义。

Numerical Simulation of Digital Detonator Open Deep Hole Millisecond Blasting Network

Taking the Sijiaying open-pit mine in Hebei Province as the research object, we studied the precision delay of the digital detonator in the deep-hole open-air millisecond blasting, proposed a millisecond blasting network that can increase the blasting effect and reduce the damage of blasting vibration, and use the nonlinear dynamic analysis software LS -dyna simulates 4 different types of open-air deep-hole short-delay blasting. The results show that the half-period of the semi-period of the blasting seismic wave of single blasthole blasting with diamond-shaped holes and the S-type tandem initiation sequence at the horizontal distance from the initiation point of 3 m to 18 m is better than that of the original mine blasting plan. The effective stress increases by 24.8%; at a horizontal distance of 25 m to 200 m from the blasting source, the peak blasting vibration velocity in the X direction is reduced compared to the original mine blasting scheme, that is, the damage of blasting vibration is reduced; the simulation results are for similar open-pit deep hole blasting projects Design and practice have certain reference significance.