冻土爆破性的初步研究  被引量:4

Preliminary Investigations into FrozsensoiIl Blastability

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作  者:马芹永[1] 

机构地区:[1]淮南矿业学院

出  处:《焦作矿业学院学报》1995年第6期65-70,共6页

摘  要:本文分析了影响冻土爆破性的因素,即形变能系数、单位炸药消耗量、单轴抗压强度、抗拉强度和波速。根据相似原理和利文斯顿爆破漏斗理论对冻结粘土、冻结砂土在三个温度(-7℃,-12℃,-17℃)下进行了系列爆破漏斗试验,然后进行了单轴抗压强度、抗拉强度和波速试验。从试验结果得出,随着温度下降冻土趋于难爆,且在同一温度下,冻结粘土比冻结砂土难爆,得出的结论对冻土爆破参数设计有一定参考作用。The factors of frozensoil blastability are analysed such as strain energy factor, explo-sivc quantity per unit volume: the uniaxial compressive strength, tensile strength and wave veloci-ty. In light of the similarity principle and explosion crater theory of C. W. Livingston,modeiling experiments are conducted chiefly concerning the explosion crater,and the uniaxial compressive strength, tensile strength, and wave velocity are measured in the samples of frozensoils and frozensands under the temperatures of-7℃,-12℃ and-17℃. The experiment results show that the lower the temperature is, the more difficult the frozensoil is to be blasted, and vice versa, and blastability of frozen soils are more difficult than that of frozen sands under the equal tempera-ture. These conclusions have significance for the study on the design of frozensoil blasting parmeters.

关 键 词:爆破性 冻土 爆破漏斗 强度 波速 

分 类 号:P642.14[天文地球—工程地质学]

 

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