Analysis of the Occurrence Mechanism for Coal and Gas Outburst Based on Multiple Discriminant Indices

Table 4

Gas pressure and gas content in inlet roadway of Panel 31020.

Drilling position	Drilling number	Measuring point depth (m)	Measuring point elevation (m)	Peak pressure (MPa)	Gas content (m^3·t^−1)
50 m inward opening of low control roadway	1	904	−654	0.30	5.0667
	2	904	−654	0.35	4.7032
100 m inward opening of low control roadway	3	906	−656	0.25	4.8338
	4	906	−656	0.30	4.1869
150 m inward opening of low control roadway	5	909	−659	0.40	5.4853
	6	909	−659	0.50	4.7330
200 m inward opening of low control roadway	7	910	−660	0.35	4.8716
	8	910	−660	0.30	5.2290
250 m inward opening of low control roadway	9	911	−661	0.30	5.0219
	10	911	−661	0.40	5.6859
300 m inward opening of low control roadway	11	913	−663	0.45	4.5965
	12	913	−663	0.40	4.3454
350 m inward opening of low control roadway	13	915	−665	0.30	5.1005
	14	915	−665	0.30	4.8301
400 m inward opening of low control roadway	15	918	−668	0.40	5.0038
	16	918	−668	0.50	4.9156
450 m inward opening of low control roadway	17	918	−668	0.30	5.2622
	18	918	−668	0.40	5.0408
500 m inward opening of low control roadway	19	920	−670	0.30	5.2569
	20	920	−670	0.35	5.1177