在用“２Ｄσ”软件对所建模型进行数值计算的基础上， 分析了因采煤引起淮北矿区下部含水层水位下降而对井壁产生的影响。其表现为： 下部含水层水位下降将引起地层压缩沉降； 地层与井壁间产生附加应力， 并在基岩下部产生应力为零的中性点； 轴向应力由小变大； 当第一含水层和下部含水层同时有水位下降时， 也有类似的规律。计算结果与淮北诸矿井壁变形位置及变化状况基本相符， 因此在此基础上进行的井筒优化设计具有实际指导意义 Based on the numerical calculation of the model with “2Dσ” software, the paper analyzes the influence of coal mining on the borehole wall caused by the decline of water level in the lower aquifer in Huaibei Mining Area. Its performance is as follows: the lower aquifer water level will lead to the formation of subsidence compression; additional stress between the formation and the borehole wall, and the bottom of the bed to produce zero stress neutral point; axial stress from small to large; when the first water There is a similar pattern when the water level drops in both the lower aquifer and the lower aquifer. The calculation results basically coincide with the deformation position and the change of wellbore wall in Huaibei Mine, so the optimal design of wellbore based on this has practical guiding significance