| 摘要 |
PURPOSE: A dual mast multi-drill machine is provided to make drilling in various directions with respect to a tunnel cross section by variously controlling a drilling direction and angle by a dual mast structural multi-drill machine. CONSTITUTION: A dual mast multi-drill machine comprises a driving unit(10), an operation unit for generating power, a first mast(30), a second mast(40), and an outer trigger. The operation unit for generating power is loaded on the upper part of the driving unit. The first and second masts are axis-joined by a worm swing gear. The out trigger is arranged in the end part of the second mast. The drilling machine drills a wall on a tunnel cross section while changing a drilling direction and angle. |
