Geometric Model for Physical Simulation System of Coal and Gas Outburst

Table 3

Statistical sizes data of outburst coal particle’s out of the cavern [17].

	Size range (mm)	<0.1	0.1∼1	1∼5	5∼10	>10
Mass percent (%)	4th coal seam +90 m level of Yu Tianbao Coal Mine	3.6	38.0	31.0	17.6	9.8
	5th cross-cut K2 coal seam cut of +280 m level in Zhong Liangshan Coal Mine	25.4	26	27.6	1.0	20.0
	South-west 5th cross-cut K10 coal seam cut of +280 m level in Zhong Liangshan Coal Mine	3.5	30.4	30.5	19.4	16.2
	Southwest half pass 4th cross-cut K10 coal seam cut of +280 m level in Zhong Liangshan Coal Mine	6.6	27.5	16.9	18.2	30.8
	6th coal seam −100 m level of Nantong Coal Mine	1.1	11.9	23.9	23.5	39.5