Study on Activation Behavior of Complex Fracture Network in Weak-Planar Rock

Figure 1

Shale outcrop with conjugate cross distribution of weak planes and its model grid diagram. (a) Sanmin shale outcrop. (b) Shale outcrop of Xiaoheba formation. (c) Conjugate weak plane shale. (d) Matrix unit. (e) Matrix cohesive unit. (f) Conjugate weak-plane cohesive unit.