Orthogonal Experimental Study on Multifactor Conditions for Gas Desorption in Coal

Table 3

Orthogonal experimental design.

Level	A: particle size (mm)	B: temperature (°C)	C: pressure (MPa)	D: moisture content (%)	E: molding pressure (kN)	F: empty form
1	2.0–5.0	30	5.0	10	200	1
2	2.0–5.0	10	4.0	8	170	2
3	2.0–5.0	0	3.0	6	140	3
4	2.0–5.0	−10	2.0	4	110	4
5	2.0–5.0	−30	1.0	2	80	5
6	1.0–2.0	30	4.0	6	110	5
7	1.0–2.0	10	3.0	4	80	1
8	1.0–2.0	0	2.0	2	200	2
9	1.0–2.0	−10	1.0	10	170	3
10	1.0–2.0	−30	5.0	8	140	4
11	0.5–1.0	30	3.0	2	170	4
12	0.5–1.0	10	2.0	10	140	5
13	0.5–1.0	0	1.0	8	110	1
14	0.5–1.0	−10	5.0	6	80	2
15	0.5–1.0	−30	4.0	4	200	3
16	0.25–0.5	30	2.0	8	80	3
17	0.25–0.5	10	1.0	6	200	4
18	0.25–0.5	0	5.0	4	170	5
19	0.25–0.5	−10	4.0	2	140	1
20	0.25–0.5	−30	3.0	10	110	2
21	0.2–0.25	30	1.0	4	140	2
22	0.2–0.25	10	5.0	2	110	3
23	0.2–0.25	0	4.0	10	80	4
24	0.2–0.25	−10	3.0	8	200	5
25	0.2–0.25	−30	2.0	6	170	1