Study on the reinforcement effect of bolt in the artificial dam of underground reservoir in Wulanmulun mine

Abstract

With the exploitation of a large number of coal resources in Western China, the phenomenon of local water shortage has become increasingly prominent. In order to protect water resources, coal mine underground reservoir came into being. In the underground reservoir of coal mine, the stability of artificial dam is often the key to the water storage. In order to enhance its stability, steel structure is often arranged inside the artificial dam and connected with the bolt arranged in the cut, so that the artificial dam and the surrounding rock form a whole and play the role of water storage and blocking together. However, the effect of this reinforcement structure still needs to be further studied. Therefore, this paper takes Wulanmulun mine as the engineering background, mainly uses FLAC3D numerical simulation software to analyze the effect of reinforcement structure, and finds out the relatively reasonable bolt size. The results show that: the artificial dam and surrounding rock are more stable and safe under the reinforcement of bolt, increasing the size of bolt will reduce the displacement and plastic zone range of cut in the side, especially increasing the size of bolt at the top and bottom will have better effect.