煤岩蠕变模型的建立及应用

本文以煤层岩石单轴蠕变实验为例,对煤层岩石力学性质分析,建立了煤岩破坏的蠕变模型和本构方程;通过建立试验数据多项回归方程,并与理论公式进行联系,求解出模型的粘性、弹性参数以及模型的蠕变方程。实例分析表明,所求参数的精度符合工程要求,模型可以较好地反映煤岩体的蠕变破坏规律;对于煤层钻井、煤层气的开采具有重要的理论和实践意义。

THE FOUNDATION AND APPLICATION ON COAL CREEP MODEL

This paper sets up the destroyed coal creep model and constitutive equations by the analysis of coal layer rock mechanics properties,which base on the example of coal layer uniaxial creep tests.By establishing the polynomial regression equation and relating with the theoretical formula,the parameters of viscosity and elasticity and the solutions of the creep model will be obtained.The instance analysis indicates that parameters accuracy can meet the engineering demands and the model can properly interpretes the rules of coal destroyed. It is particularly signicant to the coal drilling and the exploitation of coalbed gas.