Effects of Water Immersion on the Long-Term Bearing Characteristics of Crushed Gangue in Goaf

Table 3

Grain size distribution and fractal dimensions of crushed rock of different lithology before and after compression (axial stress of 3.5 MPa).

Lithology	State	Quality (kg)
		0~10 mm	10~20 mm	20~30 mm	30~40 mm	40~50 mm	50~60 mm
Mudstone	Before compression	25.31	10.48	8.05	6.78	5.98	5.40	2.5000	0.2041
	After compression	37.04	12.73	8.26	3.19	0.78	0	2.7041
Sandy mudstone	Before compression	25.31	10.48	8.05	6.78	5.98	5.40	2.5000	0.1662
	After compression	34.66	10.5	7.73	4.72	3.07	1.32	2.6662
Limestone	Before compression	25.31	10.48	8.05	6.78	5.98	5.40	2.5000	0.0558
	After compression	28.36	8.74	7.50	7.42	5.56	4.42	2.5558
Sandstone	Before compression	25.31	10.48	8.05	6.78	5.98	5.40	2.5000	0.0914
	After compression	29.68	10.16	6.98	5.37	5.32	4.50	2.5914