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Geoenvironmental Disasters

Table 4 Range analysis of the main factors of the plugging efficiency in a tunnel with flowing water

From: Plugging efficiency of pouring aggregates through multiple boreholes into an inundated tunnel to prevent groundwater inrush disasters

Levels

Aggregate particle size A (mm)

Distance between boreholes B (m)

Initial water flow rate C (10−2 m/s)

Tunnel inclination D (°)

PE1

91.39

95.56

97.50

95.52

PE2

94.29

95.21

95.39

95.28

PE3

94.28

93.90

92.94

92.77

PE4

96.67

91.95

90.78

93.05

Range

5.28

3.60

6.71

2.74

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