Swelling Pressure of Double-Expansive Material and Its Active Support Effect for Coal Seam Gas Drainage Borehole

Table 2

Fitting parameters of the fitting curves.

Fitting curves	A1	A2	a	b	R^2
1-Pr-T	−0.27	1.58	41.31	21.48	0.991
1-Pa-T	0.03	1.37	49.43	24.39	0.990
2-Pr-T	−0.09	1.68	91.77	31.00	0.987
2-Pa-T	−0.08	1.53	91.77	31.00	0.987
3-Pr-T	−1.42	2.15	28.67	49.57	0.986
3-Pa-T	−0.34	1.97	66.46	45.75	0.993
4-Pr-T	−0.35	2.21	47.48	22.59	0.997
4-Pa-T	−0.33	2.09	47.48	22.59	0.997