A Capillary Model for Predicting Saturated Hydraulic Conductivity of Ion-Adsorption Rare Earth Ore Based on Improved Kozeny–Carman Equation

Table 3

Calculation results of different equations.

Porosity (%)	Tested values	Capillary model	Original KC equation	Terzaghi’s formula [43]	Chapuis’s formula [23]
	Saturated hydraulic conductivity (×10^−4 cm/s)
44.4	5.126	3.708	9.169	0.720	4.351
47.4	7.347	7.579	17.280	0.911	5.499
50.0	13.442	12.793	27.290	1.125	6.765
52.4	21.230	19.226	38.807	1.361	8.144
54.5	27.737	26.727	51.492	1.620	9.632
56.5	33.484	35.136	65.055	1.901	11.226
58.3	38.251	44.301	79.257	2.205	12.922
Average relative error (%)		-3.10	98.15	-91.64	-49.94