分级循环荷载下保护层开采扰动煤岩强度及裂隙特性研究
杨永波,周哲

Strength and fracture characteristics of coal rock disturbed by protective layer mining under graded cyclic loading
Yong-bo YANG,Zhe ZHOU
图 8 研究区煤体的裂隙体积分布
Fig.8 Fracture volume distribution of coal in study area