一种新型隧道下台阶爆破方法及其变形方案

摘要

The paper firstly introduced and conventioned a method of blasting excavation of tunnel under bench blasting problems.In other to solve these problems, this paper provided a new type of bench blasting method, and the arrangement of blasting method, such as loading, detonating explosives and millisecond delay detonator steps description.Then, according to the different construction conditions, the paper put forward the method of two kinds of deformation scheme, blasting scheme for designers to choose. Finally,this paper used the new blasting method that has been carried on the induction summary of the advantages, and the matters of the blasting method must be aware of the comb, for the blasting operation personnel in the engineering practice guidance.%首先对常规正台阶法开挖的隧道在其下台阶爆破过程中存在的问题进行了简要介绍说明。为解决上述弊端，提供一种新型下台阶爆破方法，并对该爆破方法的炮眼布置、装填炸药和毫秒延期雷管、起爆等步骤进行具体描述；随后根据不同施工状况，提出该方法的两种变形实施方案，供爆破方案设计人员参考；最后，对该新型爆破方法的优点进行归纳总结，并对采用该爆破方法需要注意的事项进行梳理，以期在工程实践中为爆破作业人员提供相应指导意见。