论文部分内容阅读
根据有限变形力学理论，编制了弹性均质岩层在采矿影响下位移和应变的有限元计算程序，并根据岩层位移可改变裂隙宽度，进而引起裂隙渗透系数变化的思路，实现了有限变形应变与裂隙网络渗透系数的耦合分析，并就一个采矿引起顶板岩层裂隙渗透系数变化的模型进行了分析计算。结果表明，纵向裂隙的渗透系数增大约４倍，而在不考虑顶板岩层离层的情况下，横向裂隙的渗透系数减少约４倍。可见顶板岩层的变形对裂隙网络的渗透系数有显著的影响。
According to the theory of finite deformation mechanics, the finite element program of the displacement and strain of the elastic homogeneous rock under the influence of mining is prepared, and according to the displacement of the rock, the width of the crack can be changed, which leads to the change of the permeability coefficient of the crack. The finite deformation strain and fracture Network permeability coefficient of the coupling analysis, and a mining caused by roof rock fissure permeability coefficient of the model were analyzed and calculated. The results show that the permeability coefficient of longitudinal fractures increases about 4 times, while the permeability coefficient of transverse fractures decreases about 4 times without considering the separation of roof strata. It can be seen that the deformation of the roof strata has a significant effect on the permeability coefficient of the fractured network.