冻土爆破性的综合评价

Compressive Evaluation of Frozen Soil Blastability

分析了冻土爆破性的影响因素并简述了各因素的测定方法，依据层次分析法建立了冻土爆破性的层次结构模型，确定各影响因素的权重，利用效用函数理论对指标因素进行量化，采用线性加权方法建立了冻土爆破性的评价公式，评价值越大，冻上越难爆，反之冻土易爆。最后利用评价公式评价了不同温度下冻结粘土、冻结砂土爆破性的难易程度。

Basis factors of frozen soil blastability are analyzed and determined such as the uniaxial compressive strength, tensile strength, wave velocity, strain energy factor, explosive specfic charge and volume of blasting crater. The hierarchical model of frozen soil blastability is set up, and The power vectors of all the factors are obtained.Index factors are standardized with the aid of the efficient theory .The evaluation formula of frozen soil blastability is established, which shows the greater the evaluation value is, the more difficult the frozen soil is to be blasted, and vice versa. Finally,the blastabilities of frozen sands and clays under the temperature of -7℃, -12℃ and -17℃ are calutated and compared.