Experimental Investigation on the Propagation of Hydraulic Fractures through Coal-Rock Interfaces

<div>The hydraulic fracture morphology of the combination plate. The hydrofracture morphology of (a) 1# combination plate, (b) 2# combination plate, and (c) 4# combination plate.</div>

Advances in Materials Science and Engineering

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Figure 4

Figure 4: Experimental Investigation on the Propagation of Hydraulic Fractures through Coal-Rock Interfaces 