| 摘要 |
<p>An apparatus and method for inserting rebar bolts during mining ground or roof support operations is disclosed. The apparatus is removeably secured to the front head of an extendable stoper drill. The apparatus has a clutch assembly, comprising a roller, slide plate and an opposing backing plate. The axis of the roller is free to move along the slide plate at an oblique angle away from the pinch arm in the direction of extension. Extension of the drill causes the roller to apply pressure on a rebar bolt held between the slide plate and the backing plate locking it in place until the drill is retracted. When the drill is retracted, the roller moves away from the backing plate, releasing the pressure, and permitting the apparatus to slide down relative to the rebar bolt to grip the rebar bolt at a lower point. When the drill leg is next extended, the rebar bolt can be further driven into the hole penetrating the column of resin. The rebar bolt may be inserted using only the apparatus and the drill. The drill can be used in a normal fashion to drill holes, to spin the rebar bolt and to tension the rebar bolt with the apparatus mounted thereon.</p> |
