基于粘弹性模型的煤体冲击倾向指标的试验研究

Experimental Study on Coalburst Proneness Index Via Visco-elastic Creep Model

在单轴压缩条件下，通过对煤样分级加载时蠕变特性的试验研究，分析了试验煤样的粘弹性蠕变特征，并根据煤样的粘弹性微分本构方程，提出了以煤的粘弹性蠕变柔度系数来判别煤发生破坏蠕变失稳的判据，同时给出了以此来划分冲击倾向度强弱的分级标准。

By means of experimental study on creep characteristics of coal under the condition of uniaxial grading compressive loading,this paper analyzes the visco-elastic creep features of testing coal sample and proposes a criterion for determining the creep failure of coal in terms of its creep compliance coefficient in accordance with its visco-elastic differential constitutive equation,and concurrently presents the classifying level for determining the outburst proneness intensity of coal.