Experimental Investigation of Water-Sand Mixed Fluid Initiation and Migration in Filling Fracture Network during Water Inrush

Table 1

Experimental scheme 1.

Number	Test mode	Angle (°)	Upstream pressure (MPa)	Porosity of skeleton (%)	Porosity of filled sand (%)	Moving particle content (%)	Uneven coefficient Cu	Curvature coefficient Cc
FF1	Variable water pressure test	30	—	43.71	21.14	26.56	37.94	11.90
FF2		30	—	43.71	21.14	26.56	24.28	7.62
FF3		30	—	43.71	21.14	26.56	46.70	14.82
FF4		30	—	43.71	21.14	26.56	31.50	9.72
FF5		45	—	43.71	21.14	26.56	37.94	11.90
FF6	Constant water pressure test	30	0.2	43.71	21.14	26.56	37.94	11.90
FF7		30	0.2	43.71	21.14	26.56	24.28	7.62
FF8		30	0.2	43.71	21.14	26.56	31.50	9.72
FF9		30	0.15	43.71	21.14	26.56	37.94	11.90
FF10		45	0.2	43.71	21.14	26.56	37.94	11.90