Mechanical Mechanism of Water Injection to Enhance the Stability of Soft Coal

Table 1

Particle size distribution of raw coal.

Number	Particle size distribution									α	D
	Particle size (mm)	<0.1	0.1∼0.25	0.25∼0.45	0.45∼0.65	0.65∼1.25	1.25∼2.5	2.5∼5	5∼10
A1	Weight (g)	5.39	23.97	15.4273	18.63	48.89	20.78	115.99	59.72	0.812	2.188
	Percentage	1.75	7.76	4.99	6.03	15.83	6.73	37.57	19.34
A2	Weight (g)	8.23	56.66	25.17	24.91	55.75	20.26	73.64	61.62	0.676	2.324
	Percentage	2.52	17.37	7.72	7.64	17.09	6.21	22.57	18.89
A3	Weight (g)	2.03	28.84	19.21	20.30	50.90	22.53	120.59	96.61	0.996	2.004
	Percentage	0.563	7.990	5.321	5.624	14.099	6.240	33.403	26.760
Average	Percentage	1.61	11.04	6.01	6.43	15.67	6.39	31.18	21.66		2.172