Numerical simulation of pressure relief mining in Chengchao iron mine

摘要

The paper applied the method of adjusting the region mining sequence to analyses pressure relief mining in high stress region of eastern in Chengchao Iron. It was numerically simulated according to pressure relief mechanism and practical project. The stress distribution in high stress region was analyzed in different mining sequence. Simulation results showed that relief mining of adjusting the order could not only shorten the exposure time of entry in high stress area, but also improved the stress distribution of the stope, which was always in stress reduction zone. According to the characteristics of constantly moving surface and the principle of mining system optimization, working face was always in stress reduced area, finally achieving the effect of pressure relief.