冻土爆破漏斗及冻土爆破性的模型试验研究

MODEL TEST OF EXPLOSION CRATER ANDBLASTABILITY OF FROZEN SOIL

根据相似理论和利文斯顿爆破漏斗理论进行了冻结粘土、砂土在－７，－１２，－１７℃３个温度水平下的爆破漏斗模型试验，对爆破漏斗几何参数及块度进行了回归分析，冻结砂土的爆破漏斗参数回归效果比粘土高度显著，冻结粘土的爆破碎块较好地服从Ｒ－Ｒ分布，冻结砂土较好地服从Ｇ－Ｇ－Ｓ分布．按照形变能系数大小对比了冻土的爆破性，得出的结论对冻土爆破参数的设计有一定的参考作用．

Based on the theory of similarity and explosion crater of C.W.Livingston,model tests are made of explosion crater with samples of frozen clay and frozen sand at temperature of -7 ℃,-12 ℃ and -17 ℃.Linear regression analyses are made of crater parameters and size distribution.Regarding the crater parameters,the results of frozen sand are better than those of clay.The size distribution of the frozen clay is close to Rosin Rammler function,and that of frozen sand Gates Gaudin Schumann function.And the blast ability of frozen clay and the frozen sand are compared in terms of strain energy factor.The conclusions can be used for reference in design of blasting parameters.