论文部分内容阅读
通过现场工程调查、煤岩的显微结构实验和全应力 -应变实验分析 ,提出一种适宜于研究矿山煤岩流变力学问题的广义弹粘塑性模型 ,建立了模型的本构方程、简单应力状态下的蠕变方程和复杂应力状态下的蠕变方程 .最后 ,利用非线性回归分析法———最小二乘法中的Mar quardt法对蠕变实验结果进行分析 ,获得有关煤岩的流变力学参数 .理论分析结果和试验结果对比表明 ,两者之间具有较好的吻合性 .
Through field investigation, microstructure experiment and full stress-strain experiment analysis of coal and rock, a generalized visco-viscoplastic model suitable for studying the rheological mechanics of coal and rock is proposed. The constitutive equations of the model, simple stress State creep equation and the complex stress state of the creep equation.Finally, using non-linear regression analysis --- Marquardt method in the least squares method to analyze the creep experimental results to obtain the rheology of coal and rock Mechanical parameters.Comparison between the theoretical analysis and experimental results shows that there is a good agreement between the two.