Impact of Depressurizing Boreholes on Energy Dissipation in Deep Roadway

Table 2

Simulation schemes for the depressurizing boreholes.

Constants	Orientation		Length		Interspacing
	Horizontal boreholes drilled in ribs		9 m		1.2 m
Simulation schemes	I	II	III	IV	V	VI
	2 : 3	1 : 2	1 : 4	1 : 6	1 : 8	1 : 10
Diameter	400 mm	300 mm	300 mm	300 mm	300 mm	300 mm
Row spacing	600 mm	600 mm	1200 mm	1800 mm	2400 mm	3600 mm

Note that the simulation results without boreholes were regarded as a reference for comparison.