Numerical Simulation of Blast Vibration and Crack Forming Effect of Rock-Anchored Beam Excavation in Deep Underground Caverns

Table 1

Different blast hole layout and charge parameter.

Name	Hole diameter	Hole distance	Hole depth	Hole amount	Cartridge diameter	Charging density
① Vertical holes	Φ 42 mm	30 cm	248 cm	68	Φ 25 mm	65/70/85 g/m
② Oblique holes	Φ 42 mm	30 cm	260 cm	68	Φ 25 mm	65/70/85 g/m
③ Auxiliary holes	Φ 42 mm	90 cm	242 cm	22	Φ 25 mm	186/206/250 g/m