BM-500A

Raise Boring Rig, BIG MAN series

BM-500A

Primary Use :

Raise boring

Descriptions :
The BM-500A had been the largest model for holes ranging to 4,750 mm in diameter at the maximum at its launch in 1993. Still now, this model is operating at various job sites.

Model		BM-500A
Reaming dia.	mm	4,775
Spindle rotation	rpm	43
Torque	kN-m	450
Thrust	kN	2,570 (Push) / 4,810 (Pull)
Power unit	kW	110-4P x 2, 37-4P
Drill unit size	mm	3,607 x 3,000 x 6,850
Control unit size	mm	1,200 x 900 x 1,050
Power unit size	mm	4,100 x 2,200 x 2,400
Weight (Drill unit / Control unit / Power unit)	kg	35,500 / 300 / 10,000
Standard drill pump (Model MG-50)	Max. discharge rate 880 L / min, Max. discharge pressure 2.2 MPa

Reaming digging

To take advantage of the high power of Big Man BM600A, we have developed a φ6m reaming bit.

Big Man is installed on the rock above the mine, and first, a small vertical shaft is drilled for passing the Big Man rod toward the mine. This is called pilot digging. After piercing the lower tunnel, remove the bit for pilot drilling that has penetrated and connect it to the reaming bit installed in the tunnel. The basic procedure of reaming excavation is to excavate the large diameter reaming bit with a big man.