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. 13. Comparison of crack initiation strengths and damage strengths from cumulative AE count and cumulative AE energy methods and crack volume strain method.