坚硬岩石巷道中深孔掏槽爆破试验研究

 针对普遍存在的硬岩中爆破效果差的问题，在双阳煤矿坚硬岩石巷道进行中深孔爆破试验，得到各种不同掏槽形式爆破的试验效果，通过比较得出复式桶式掏槽完全适合于中深孔爆破，炮眼利用率高。最后总结出巷道掘进爆破的一些很有价值的成果，给出避免炸药发生钝化效应的最小炮孔间距，理论计算掏槽眼的装药长度，并根据双阳煤矿的实际施工情况，给出具体改进建议以及提高爆破效果技术措施，在原有装备水平的前提下，通过调整生产组织，大幅度提高掘进工效，降低掘进成本，取得相当可观经济效益。试验成果可供其他类似工程提供参考。

TESTING STUDY ON MIDDLE DEEP CUT-HOLE BLASTING IN HARD ROCK TUNNEL

Aiming at the problem of poor blasting effects that exists universally in hard rocks，the middle deep hole blasting tests were done in hard rock tunnels at Shuangyang Mine；and the blasting test results of different kinds of cutting forms have been gotten. Through comparison，the compound barrel cutting is proved to be completely fit for middle deep hole blasting；and the utilization rate is high. At last，some valuable achievements of tunnel blasting are summarized，and the least space between holes that can abstain passive effects of explosives is proposed. The charging length of cutting holes is calculated in terms of theory. According to the construction of Shuangyang Mine，some concrete improving suggestions and technological methods that can raise the blasting effects are presented. By adjusting production organization，not only is the efficiency raised but also the costs are reduced on the basis of former equipment levels producing substantial economical benefit and offering reference to other similar works.