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分析了预裂爆破技术在层状复合岩体中作用机理,对梁万高速公路A合同段层状复合岩体路堑开挖中预裂爆破参数设计进行了探讨。由于层状复合岩体特殊性质,岩体内不同岩层对应不同的线装药密度。为了控制爆破危害,依据被保护对象的要求,除严格遵守安全规程外,还需采取一些特殊的安全措施。通过现场试验,获得了较好的爆破效果。
The mechanism of presplit blasting technique in layered composite rock mass is analyzed, and the design of presplit blasting parameter in the process of cutting of layered composite rock mass in A contract section of Liangwan Expressway is discussed. Due to the special nature of layered composite rock mass, different rock layers correspond to different line charge densities. In order to control the blasting hazard, according to the requirements of the protected object, some special safety measures need to be taken in addition to strictly observing the safety regulations. Through field test, get a better blasting effect.