Rockburst Prediction of Deep Mining in Tectonic Stress MineReportar como inadecuado




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As more than 40 years’ mining in Chengchao Iron Mine, the excavation depth now is arriving at -600mlevel, and rockburst is becoming one of the main safety problems during the deep mining in the tectonic stressmine, so as to predict the possibility and intensity, rock specimens from the depth of -430 meters to -700 metersare obtained for systematical rocks mechanics testing. Based on various prediction criteria, the different intensityof the wall rock for rockburst are ascertained. Combined with the measured in-situ stresses, the model of the in-situstresses field is established, and elastic strain energy of wall rock is confirmed by the strain numerical simulation,judging by the engineering research and site monitoring, the critical mining depth for rockburst is obtained. At last,according to the above analysis, the possibility of rockburst during deep mining and its potential depth in ChengchaoIron mine is predicted.

KEYWORDS

tectonic stress mine; deep mining; rockburst; prediction

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Autor: Zijian Du, Yongtao Gao, Daiqiang Deng, Haoliang Han

Fuente: http://www.scirp.org/



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