| 摘要 |
PURPOSE: A perforator is provided to easily cut rock by sequentially penetrating holes on the rock without using powder and to conveniently perforate deep hole of a burn cut method in blasting a tunnel. CONSTITUTION: A perforate inducer(2) inserts an inducing bar(3) on a lower inside and contains a spring(4) on an upper side, and then fixes an inducing hole on an end portion of the inducing bar. A perforator is provided to easily remove rock without generating dust and vibration while constructing road or building and penetrating a deep hole of burn cut in subway tunnel. An adapter(7) is inserted to a connect unit(6) welded(12) on a side face of the perforate inducer, and a screw unit(11) of a rod(10) is engaged to an upper side of the adapter, and then, a bit(9) is combined to a lower screw unit(8). A free face perforator(1) is used by connecting the rod into a rock drill in perforating. The rod connected to the rock drill rotates the bit by being rotated through hydraulic pressure and pneumatic pressure to perforate the hole on the rock.
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