1.Key Laboratory of Ministry of Education on Safe Mining of Deep Metal Mines,Shenyang 110819,China;2.School of Resource & Civil Engineering,Northeastern University,Shenyang 110819,China;3.Institute of Mining Engineering,Beijing General Research Institute of Minging & Metallurgy,Beijing 100160 China;4.Chifeng Hongling Nonferrous Metal Mining Co.,Ltd.,Chifeng 025450 China