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

Table 5

Type II fracture.

Aquifer	Water exit points	Total volume of injected grout (t)	Volume of injected grout into one borehole (t)
L8	38	1428	42.0
L10	10	448	44.8
L11	2	106	53
Total	50	1981.8	139.8