Characteristics of Ground Stress Field and Prediction Analysis of Deep Rockburst in Tongkuangyu Mine
Currently,the Copper Mine Valley Phase Ⅱ project has entered the 410 meter middle section for mining.After the completion of this mining section,it will be transferred to deep engineering mining.As the mining depth continues to increase,it will also face the problem of increased geostress.Taking the in-situ stress field and deep rock burst prediction of Tongkuangyu mine as the research object,the stress relief hole wall strain method was used to measure the original rock stress at the level of 800~870 meters,and the general law of the in-situ stress field in Tongkuangyu mining area was obtained.18 physical and mechanical parameters of drilled rock cores were measured at the level of 220~410 meters.Combined with Barton method,national standard method,Tao Zhenyu method and other criteria,the rock burst prediction analysis of the deep mining area at the level of 220~410 meters was completed.
ground stress fieldBarton's methodnational standard lawTao Zhenyu's methodrock burst prediction