Dynamic Subsidence Simulation and Land Reclamation Efficiency Analysis of Surface Ground Above Mining Block

According to the low reclamation ratio, high reclamation cost, high reclamation difficulty and other problems existed in the reclamation after the mining s ubsidence stabilized in high potential water level mining area, taking a mining block in Hengyuan Coal Mine as a study object, based on the analysis on the ground topo graphy features before the mining operation, in combination with the mining plan, the simulation was conducted on the ground surface dynamic subsidence process and the utilization variation of the surface ground land under the influences of the coal mining operations was analyzed. Based on the simulation on the subsidence circumst ances, in combination with the information on the surface ground dynamic subsidence the surface ground original topography, the reclamation efficiency of each mining stage was compared under the reclamation conditions with non flling materials and the relationship between the ponding area and the reclamation land area at each st age subsidence was quantitatively revealed.