井巷开挖后,围岩应力会重新分布出现应力降低区和升高区,形成松弛圈。测定松弛圈的破碎程度和松弛范围,可以评价爆破效果,判断围岩稳定性,为支护设计提供依据。介绍了引黄工程国际一标声波测试系统,工作方法及成果分析,并利用测试成果对国际一标的爆破方法进行评价。 After the excavation of the roadway, the surrounding rock stress will redistribute the stress reduction zone and the raised zone to form a slack circle. Determining the degree of fragmentation and the relaxation range of the slack ring, the blasting effect can be evaluated, the stability of surrounding rock can be judged, and the basis for the support design can be provided. The international standard acoustic test system, working method and result analysis of Yellow River Diversion Project are introduced. And the international standard of blasting method is evaluated by test results.