Optimization of Indirect Fracturing Process Parameters Based on Mechanical Properties of Fractured and Low-Permeability Coal

Table 2

Stress state of hydraulic fracturing experiments.

Specimen number	Stress (MPa)
	σv	σH	σh
1#	9	5	3
2#	9	5	3
3#	8	5	3
4#	8	5	3
5#	7	5	3