Investigation of Multiple Hole Grouting for Reducing Water Inrush Risk in Underground Engineering

Table 4

Type 1 fracture.

Aquifer	Water exit points	Total volume of injected grout (t)	Volume of injected grout into one borehole (t)
L8	10	127	15.9
L10	0	0	0.0
L11	0	0	0
Total	10	127	15.9