TY - Journal of Yangtze River Scientific Research Institute A1 - WANG Ning, JIANG Yao-dong, ZHU Deng-yuan, YAN Zheng-yu T1 - Failure and Coal Bumps Characteristics of Hard Roof-coal Structure Y1 - 2018-03-01 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 65 EP - 69 VL - 35 IS - 3 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20171103 ER -