Influence of different dynamic load calculating methods on rock dynamic fracture toughness test
ZHANG Sheng1,LI Xin-wen1, 2,YANG Xiang-hao1
1. College of Energy Science and Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, China; 2. Yuwu Coal Industry Corporation, Lu’an Group, Changzhi, Shanxi 046103, China