冻土爆破作用与特性分析

从理论上分析了冻土的爆破作用，爆腔周围依次形成四个区：流体区、破裂区、弹塑性变形区、弹性区。根据相似理论和利文斯顿爆破漏斗理论进行了冻结粘土、砂土不同温度下的爆破漏斗试验，对爆破漏斗几何参数、块度、漏斗形式及扩腔进行了分析，并进行了最佳药量及最佳深度的计算。得出结论对冻土爆破设计有一定的参考价值

Explosion effects and characteristic analysis of frozen soils

In the terms of the theory, this paper discusses explosion actions of frozen soils. The frozen soil around explosion cavity is made of fluid, fragmentation, elastic-plastic and elastic regions from the close to the distend. In the light of the similarity principles and explosion crater theory of C. W. Livingston, modeling experiments of explosion crater are conducted in frozen clays and frozen sands at the temperature of -7-12and-17. Linear regression analysis is made on the blasting crater parameters and size distribution, shape of explosion crater and enlarging cavity of explosion are analyzed. Optimum explosive charge for a given depth and optimum depth for a given explosive charge are determined. The conclusions are of significance for the study on the design of frozen soil blasting parameters.