TY - Journal of Yangtze River Scientific Research Institute A1 - SUN Zhen-ping, GAO Zhao-ning, MENG Xiang-rui T1 - Permeability Coefficient of Damage Zone of Surrounding Rock Based on Drucker-Prager Criterion Y1 - 2013-03-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 26 EP - 29 VL - 30 IS - 3 UR - http://ckyyb.crsri.cn N1 - 10.3969/j.issn.1001-5485.2013.03.006 ER -