神东矿区属于生态脆弱区，矿井工作面强采扰动将会导致覆岩破损及渗透性演化增加，从而致使矿区生态坏境遭到严重破坏。为此，本文以李家壕煤矿为研究背景，构建了“采动裂隙环形体”三维模型及其边界判别方法，通过数值模拟手段，分析了强采扰动作用下上覆岩层破损变化特性，研究了强采上覆岩层裂隙分布规律与渗透性演化规律。结果表明，采空区上覆岩层单轴抗压强度随加载速率的增加呈增加趋势，且具有明显的脆性破坏行为；模拟中发现工作面两端可划分为剪切破坏区，而采空区上覆岩层则为拉伸破坏区域；在采动应力影响下，上覆岩层结构、工作面推进速度及工作面推进长度是影响其裂隙发育的重要因素，随着采空区上覆岩层弹性模量机械增大，其渗流速度呈现线性增加趋势，同时孔隙水压也随之降低。研究结果对我国煤矿安全高效开采及矿区生态环境保护具有重要意义。

Shendong mining area belongs to the ecologically fragile area. The strong mining disturbance of the mine working face will lead to the damage of the overburden rock and the increase of the permeability evolution, which will cause the ecological environment of the mining area to be seriously damaged. Therefore, this paper takes Lijiahao Coal Mine as the research background, constructs a three-dimensional model of ' mining-induced fracture annular body ' and its boundary discrimination method. Through numerical simulation, the damage variation characteristics of overlying strata under strong mining disturbance are analyzed, and the fracture distribution law and permeability evolution law of overlying strata under strong mining disturbance are studied. The results show that the uniaxial compressive strength of the overlying strata in the goaf increases with the increase of the loading rate, and has obvious brittle failure behavior. In the simulation, it is found that the two ends of the working face can be divided into shear failure areas, while the overlying strata of the goaf are tensile failure areas. Under the influence of mining stress, the overlying strata structure, working face advancing speed and working face advancing length are important factors affecting the fracture development. With the mechanical increase of the elastic modulus of the overlying strata in the goaf, the seepage velocity shows a linear increase trend, and the pore water pressure also decreases. The research results are of great significance to the safe and efficient mining of coal mines and the protection of ecological environment in mining areas in China.