TY - Journal of Yangtze River Scientific Research Institute A1 - NIU Jiang rui,YAO Chi, YANG Jian hua, ZHOU Chuang bing T1 - Numerical Study on Strength and Crack Coalescence Behavior ofSandstone Containing Two Pre-existing Non-coplanar FissuresBased on Improved Rigid Body Spring Method Y1 - 2017-10-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 102 EP - 106 VL - 34 IS - 10 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20160591 ER -