Abstract:When transferring from open-pit to underground mining, the pillar in the panel area can withstand the load of the overlying rock layer, which has a significant impact on the stability of the rock mass in the mining area. To ensure the safety of underground mining production, this study uses numerical simulation methods to generate a three-dimensional real-scene model based on the image data obtained from drone aerial photography. A three-dimensional mine numerical model is established, and different width strip pillars are arranged between panels. Four types of panel pillars with widths of 20m, 30m, 40m, 34m, and 26m are compared and analyzed for size. By comparing the stress distribution and plastic distribution characteristics of the pillar in the panel area, it was found that as the pillar width increases, the plastic failure distribution area decreases, and the maximum principal stress value decreases. This can effectively protect the stability of the mining area, and the optimal plan with a pillar width of 34m and 26m alternating is obtained. The research results can provide a reference for pillar design under similar mining conditions.
