Experimental Investigation of the Effects of the Gangue Particle Size on the Evolution Rules of Key Seepage Parameters

Table 2

Conversion between axial stress and oil pressure.

(MPa)	1.5	2	4	6	8	10	16	20
(m^2)	0.00785	0.00785	0.00785	0.00785	0.00785	0.00785	0.00785	0.00785
(N)	11775	15700	31400	47100	62800	78500	125600	157000
Oil pressure (KN)	11.775	15.7	31.4	47.1	62.8	78.5	125.6	157