Experimental Analyses of the Major Parameters Affecting the Intensity of Outbursts of Coal and Gas

Table 1

Experiments program.

Level	Vertical load (MPa)	Horizontal load (MPa)	Moisture (%)	Gas pressure (MPa)	Porosity (%)
1	2	1.4	0	0	1.57
2	3	2.4	2	0.5	2.51
3	3.6	3.2	4	0.65	3
4	4	3.4	8	0.72	3.6
5	—	—	—	1	—
6	—	—	—	1.5	—

Remarks: the fixed values are 3 MPa (vertical load), 2.4 MPa (horizontal load), 4% (moisture), 1 MPa (gas pressure), and 2.51% (porosity).