TY - Journal of Yangtze River Scientific Research Institute A1 - HAN Wen-qi, YU Hong-ming, CHEN Peng-yu T1 - Experimental Study on Relation between Rockfall Velocity and Impact force Y1 - 2016-12-20 JF - Journal of Yangtze River Scientific Research Institute JO - Journal of Yangtze River Scientific Research Institute SP - 42 EP - 45 VL - 33 IS - 12 UR - http://ckyyb.crsri.cn N1 - 10.11988/ckyyb.20150492 ER -