Study on Artificial Dam Thickness of Underground Reservoir in Wulanmulun Mine

With the exploitation of coal resources in Western China, the local water shortage and loss are becoming more and more serious. In order to protect water resources, coal mine underground reservoirs came into being. As the main part of underground reservoir in coal mine, the stability of artificial dam is of great significance. The dam thickness is a key parameter of the artificial dam, which is closely related to stability of the dam. Taking Wulanmulun mine as the engineering background, the artificial dam model is established by FLAC3D software. The mechanical response and deformation law of the dam under different thickness are analyzed from three aspects of displacement, stress and plastic zone. The results show that the increase of dam thickness can reduce the displacement and stress level of dam and groove, and reduce the distribution of plastic zone. In comprehensive consideration, the thickness of the artificial dam can be increased to 1.4m to improve the stability of the dam.