Experimental Investigation on the Mixture Ratio and Diffusion Performance of Grouting Materials for Water Bursting Prevention in Coal Mines

Table 4

Measured diffusion distance.

Grout mass ID	Hydraulic pressure (MPa)	Confining pressure (MPa)	Grouting pressure (MPa)	Z(+) distance (mm)	Z(−) distance (mm)	X(+) distance (mm)	X(−) distance (mm)
DS1	0	1	1	50.81	30.25	41.26	39.62
DS2	0.5	1	1	48.59	27.15	39.83	37.17
DS3	1	1	1	46.61	24.91	37.63	35.41
DS4	0.5	1	2	40.58	20.88	31.69	30.82
DS5	0.5	1.5	2	37.42	15.47	27.31	26.28
DS6	0.5	2	2	25.74	9.81	18.54	15.72