TY - Journal of Yangtze River Scientific Research Institute A1 - LI Jian-he, SHENG Qian, ZHU Ze-qi, NIU Li-min, RUAN Hang T1 - Research Progress of Mechanical Characteristics and Constitutive Model of Rock under Unloading Condition Y1 - 2017-07-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 87 EP - 93 VL - 34 IS - 7 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20160388 ER -