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. 4. Typical crack volume strain curves of coal reservoir samples with different bedding angles.