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根据前人对煤岩的实验研究,采用岩石强度随机统计分布假设,建立了能够较好的反映煤岩单轴压缩状态下的初始压密段和残余强度的分段损伤本构方程,并且给出了其中参数的确定办法。利用刚性实验机进行了煤岩单轴压缩实验,对应力-应变曲线与损伤的关系进行了分析。利用实用复合形法对所提的损伤本构方程进行了参数求取。拟合结果表明理论和实验结果符合较好。
Based on the previous research on coal and rock, the stochastic damage constitutive equation which can reflect the initial compressive section and the residual strength under uniaxial compression of coal is established by using the random statistical distribution of rock strength. Out of which parameters to determine the way. The uniaxial compression tests of coal and rock were carried out by using a rigid testing machine, and the relationship between stress-strain curve and damage was analyzed. The parameters of the proposed damage constitutive equation are obtained by the practical complex method. The fitting results show that the theoretical and experimental results are in good agreement.