Anisotropy of crack initiation strength and damage strength of coal reservoirs |
HAO Xianjie,WEI Yingnan,YANG Ke,SU Jian,SUN Yingfeng,ZHU Guangpei,WANG Shaohua,CHEN Haibo,SUN Zhuowen |
Fig. 6. The variation trends of crack initiation ratio and damage ratio with bedding angle. |