Blast-Casting Mechanism and Parameter Optimization of a Benched Deep-Hole in an Opencast Coal Mine

Table 1

Measured blast-casting parameters and results (Part).

Profiles	q	B	H	a	W	V	L	Vs	Vq	ks	η
P18-18	0.67	7	35.2	11	7	964.5	84.4	3474.9	2825.6	1.23	27.76
P19-17	0.67	7	35.4	11	7	1031.1	85.7	3366.9	2709.5	1.24	30.63
P18-17	0.67	7	35.6	11	7	1105.6	86.6	3588.6	2793.3	1.28	30.81
P18-13	0.67	7	37.4	11	7	1105.6	86.6	3588.6	2793.3	1.28	30.81
P19-10	0.67	7	39.9	11	7	1284.1	102.2	3890.1	3108	1.25	33.01
P18-10	0.67	7	40.1	11	7	1286.2	105.9	3892.7	3207.6	1.21	33.04
P18-6	0.67	7	43.1	11	7	1323.9	109.1	3979.6	3353.9	1.19	33.27
P29-3	0.7	7	28.4	11	7	687.9	89.9	2765.2	2311.2	1.2	24.88
P29-14	0.7	7	29.8	11	7	827	91.4	2785.5	2293.8	1.21	29.69
P29-9	0.7	7	29.9	11	7	969.3	91.8	3040.9	2369.9	1.28	31.88
P29-17	0.7	7	31.8	11	7	1004.5	94.1	2953.7	2418.8	1.22	34.01