Mechanical Constitutive and Seepage Theoretical Model of Water Storage Media Based on Fractional Derivative

Table 2

Seepage model parameters of water storage media in underground reservoir of coal mine.

Size (mm)	Fractional model			Forchheimer model
	k ×10^-3 (m/s)			Fitting equation
Mixed size	0.8605	0.4893	0.9943		0.9781
5~10	3.864	0.4199	0.9992		0.9945
10~15	2.653	0.5828	0.9980		0.9918