Research Article
Experimental Investigation on the Propagation of Hydraulic Fractures through Coal-Rock Interfaces
Figure 7
The hydrofracture morphology of the 3D coal-rock combination sample. The fracture morphology of (a) 1# sandy mudstone sample, (b) 3# coal sample, and (c) 4# coal-rock combination sample.
(a) |
(b) |
(c) |