Strength controlled by block proportion
At low block proportions, matrix cohesion difference significantly reduces UCS; at high proportions, strength approaches that of the strong matrix bimrock and the difference effect diminishes.
Li, Kai · Sun, Shaorui · Le, Huilin · Wei, Jihong · Hu, Yanran
Bulletin of Engineering Geology and the Environment 2023
Failure modes are mainly summarized as penetrating failure, extended failure, and semi-penetrating failure