Optimization of Zoning Mining Scheme for Deep Ore Body in Chengchao Iron Mine
The mining of the-500 m middle section ore body in Chengchao Iron Mine is coming to an end and is about to enter the mining stage of the-570 m middle section ore body.Only mining the-570 m middle section ore body cannot guarantee the production demand.In order to ensure production capacity demand,taking the middle section of-570 m and-675 m ore bodies and surrounding rocks of Chengchao Iron Mine as research objects,the impact of mining different mining schemes on surface stability was studied.A three-dimensional numerical model was established using MIDAS software,and the three-dimensional finite difference software was used to simulate and study the surface rock movement caused by underground mining under different mining schemes.Based on the numerical simulation results,the stress distribution of the mining site was analyzed and stability suggestions were proposed.The results show that after the deep mining of the Chengchao Iron Mine,the main impact of deep mining on the surface is directly above the ore body,and the size of surface subsidence is inversely proportional to the distance from the collapse pit.The ore bodies in the middle section of-570 m and-675 m are separated by a 49 line as separation pillar.When the western side of the pillar is filled and the eastern side is collapsed for mining,it can achieve a dynamic balance between surface stability and economic benefits.
Deep ore bodyZoning miningSurface subsidenceStability analysisNumerical simulation
万方数据
维普
