Parametric Study on the Ground Control Effects of Rock Bolt Parameters under Dynamic and Static Coupling Loads

Table 10

Model design with different bolt spacings.

Model	L (mm)	φ (mm)	Lg (mm)	S (mm)
Lg1	2000	20	600	1000
Lg2	2000	20	800	1000
Lg3	2000	20	1000	1000
Lg4	2000	20	1200	1000

Lg is the bolt spacing, L is the bolt length, φ is the bolt diameter, and S is the grouting length.