| 摘要 |
A device that is used to guide a drill, drill steel, drill rod or drill bit parallel to another drill hole. This device is put on the drill rod or steel after the first hol e is drilled to guide the consecutive holes. The device comprises of a rock drill guide(RDG) which is made of a high strength material and is adjustable to change the spacing or burden t o fit the required drill pattern. The RDG is made of a hollow tube which is fixed to a horizontal bar or beam which is coupled around the drill rod or drill steel. The hollow tube is inserted into a previously drilled hole so when the drill bit is advanced to the collaring location the RDG lines up the new hole to the same angle and rotation as the previous hole so the holes are drilled parallel. The hollow tube is interchangeable t o meet different diameter holes.
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