采动影响下等效连续介质水岩耦合数学模型及应用

为研究采动影响下含水层渗流场演化规律，推导了以应变为参数的裂隙岩体等效渗透系数，基于Biot固结理论建立了等效连续介质水岩耦合数学模型，采用快速拉格朗日有限差分进行了数值模拟.研究结果表明：裂隙是采动岩体渗流的主要通道；煤层开采初始阶段岩体渗透性增加区域在底板呈“W”形分布，在顶板岩体渗透性增加区域呈“M”形分布；当含水层渗透性增加区与下方顶板渗透性增加区相交时，形成导水裂隙；在渗透性增加区内岩体形成了相对“膨胀区”，而在渗透性降低区内岩体产生被压缩的现象.

An equivalent porous media water-rock coupling model impacted by coal mining and its application

In order to research the aquifer seepage field evolutional law impacted by coal mining,an equivalent porous media conductivity for fracture rock mass was deduced,in which the strain was considered as the parameter,and an equivalent porous media water-rock coupling numerical model was developed basing on Biot consolidation theory,and the fast Lagrange finite difference method was used in the numerical simulation.The results indicate that the fracture is the main channel where the groundwater goes through,the...