Blasting Impact Simulation Test and Fragmentation Distribution Characteristics in an Open-Pit Mine

Table 2

Cumulative mass and fractal dimension of the coal specimen fragments under different pressures.

p (MPa)	Original mass M (g)	Cumulative mass MR (g)						Slope d	Fractal dimension D
		0–1.0 mm	0.0–2.0 mm	0.0–5.0 mm	0.0–10.0 mm	0.0–15.0 mm	0.0–50.0 mm
0.13	119.7	0.05	0.12	0.39	1.07	1.07	100	1.78	1.22
0.17	118.8	0.47	1.28	3.38	9.5	25.02	100	1.39	1.61
0.25	122.3	1.59	5.28	11.41	25.92	50.01	100	1.06	1.94
0.30	118.2	1.66	5.88	12.72	27.88	62.86	100	1.06	1.94
0.50	120.8	2.21	7.19	16.21	37.36	67.48	100	0.99	2.01
0.70	121.8	1.81	6.6	18.47	44.49	69.75	100	1.05	1.95
0.90	121.8	2.95	9.42	25.07	56.3	89.73	100	0.94	2.06
1.20	120.1	3.07	17.21	37.53	67.6	90.93	100	0.86	2.14
1.50	127.5	4.52	20.23	41.6	73.71	89.7	100	0.77	2.23
2.00	132.3	9.45	32.78	51.04	80.67	95.35	100	0.58	2.42