Mechanism and Application of Static Fracturing Technology on Deep Working Face

Table 8

Stress ΔU range of each model.

	Hole diameter A	Hole spacing B	Hole depth C
k1	11.4525	30.35333	22.45
k2	21.8325	27.6	22.50667
k3	37.5975	12.085	28.18333
k4		20.25	21.37
k5		22.5
Range	26.145	18.26833	6.813333