A New Method for Predicting Coal and Gas Outbursts

Table 1

Statistics pertaining to times and intensity of outbursts in the mine.

Grade of outburst intensity (t)	Times of outburst		Outburst intensity
	Times	Proportion (%)	Maximum amount of coal burst (t)	Average amount of coal burst (t)	Maximum amount of gas emitted (10^4 m^3)
Submassive outburst (100 to 499 t)	2	8.7	235	186	3.3
Medium outburst (50 to 99 t)	2	8.7	94	72	3.4
Small outburst (<50 t)	19	82.6	39	12.4	8.3
Total	23	—	235	32.7	8.3