初始应力场对爆破效果的影响

THE INFLUENCE OF INITIAL STRESS FIELD ON BLASTING

通过对存在不同初始应力场的几种材料的室内试验和地下矿山爆彼实例的分析，发现初始应力场对爆破效果有很大的影响。初始应力场的存在改变了爆轰波的传播规律，同时，对裂纹发展起着导向作用。正确认识和掌握初始应力场的规律，通过合理布置炮孔位置，正确选取爆破参数，可以大大提高工作效率。减少资源损失和改善爆破效果。

It is found that the initial stress field has a great bearing on blasting based on in house tests under different initial stress field conditions and case study of mine blasting. The initial stress field changes the rules of blasting wave propagation and guides the development of micro cracks. Correct cognition of the rules of initial stress field, reasonable borehole pattern and proper selection of blasting parameters can improve greatly the working and blasting efficiency and reduce the loss of resources.