Mechanism and Application of Static Fracturing Technology on Deep Working Face

Table 9

Range for width of plastic zone ΔL of each model.

	Hole diameter A	Hole spacing B	Hole depth C
k1	0.6375	1.697	0.86
k2	0.9625	0.65	1.087
k3	1.1575	0.555	1.04
k4		0.71	0.687
k5		0.73
Range	0.52	1.142	0.4