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

Table 6

Type III fracture.

Aquifer	Water exit points	Total volume of injected grout (t)	Volume of injected grout into one borehole (t)
L8	80	2921.9	48.7
L10	50	3235.0	95.1
L11	9	766.0	95.8
Total	139	6922.9	239.6