Abstract:
Due to illegal mining and over-mining activities, a certain mine has experienced damage to the security pillars of the mining area, resulting in instability of the mined-out area groups, surface collapse, and impact on resource recovery near the mining areas and surface structures. To control surface collapse and the hidden dangers in the mining area groups, a mining body-goaf group model near-collapse area is established based on geological data. Based on this model, the goafs are managed and treated in different areas. The research results show that the presence of loose materials within the goafs can control changes in compressive stress to a certain extent. When the empty spaces are filled with a mixture of loose materials and cemented materials, it can control changes in tensile stress to a certain degree. When the empty spaces are completely filled with cemented materials, it can significantly improve the stress and displacement changes in the empty areas. The approach of empty areas takes advantage of the situation, which not only ensures safe construction but also effectively controls the scope of influence of the surface collapse area and recovers resources near the mining-out area groups.