Fracture Characteristics and Geometric Fractal of Damaged Sandstone under Impact Load

Table 2

Size distribution of broken rock blocks of sandstone with different damage degrees under impact load.

Upper limit of stress	m (g)	31.5 (g)	26.5 (g)	19 (g)	10 (g)	4.75 (g)	2.36 (g)	1.25 (g)	0.63 (g)	0.3 (g)	(mm)
0	139.160	0	127.081	0	0	0	4.590	4.435	2.087	0.966	20.993
	140.647	85.674	0	33.758	0	0	4.082	6.794	9.256	1.082
	138.815	0	126.464	0	0	0	5.029	4.740	2.189	0.394
20%	135.780	0	98.9463	25.985	3.497	2.683	0	1.578	1.444	1.647	19.770
	137.192	0	103.398	24.652	3.473	1.454	0	0	1.873	2.342
	138.281	0	102.753	23.754	3.887	2.648	0	2.130	2.030	1.079
40%	136.685	0	62.463	44.768	11.548	4.548	4.937	2.1274	4.8593	1.433	16.182
	136.082	0	62.749	47.674	9.335	3.335	3.356	2.9873	5.5766	1.069
	137.412	0	64.729	45.850	10.989	2.989	4.558	2.0879	4.1518	2.056
60%	139.662	0	37.356	45.854	28.278	8.038	4.257	5.1138	4.8492	5.915	12.414
	139.8546	0	35.337	43.575	30.569	7.653	4.569	6.2376	6.3875	5.527
	136.9837	0	35.347	44.014	28.424	7.842	4.413	5.6053	5.618	5.721
80%	137.0231	0	30.165	32.868	30.656	8.073	8.755	8.5764	8.1538	9.776	10.362
	138.5824	0	29.645	32.377	28.357	9.659	9.765	8.7548	9.4356	10.589
	140.2160	0	30.905	31.122	30.506	8.866	9.670	8.6689	8.7947	11.683