| 摘要 |
A drill pot for rotating a drill steel is supported at the front end portion of a drill boom that extends forwardly from a self-propelled frame. The drill boom raises the drill pot in a straight line to advance the rotating drill steel into the mine roof and drill a bore hole for the installation of a roof bolt. A drill guide carriage is supported at the front end portion of a drill guide boom that also extends forwardly from the machine frame. The drill guide boom is positioned in overlying relation with the drill boom and is raised to move the drill guide carriage in vertical alignment with the drill pot. A pair of drill guide members is pivotally connected to the drill guide carriage for movement into a closed drill guide position surrounding the drill steel. As the drill steel advances into the mine roof, the drill guides members maintain the drill steel axially aligned with the bore hole to prevent rubbing of the drill steel with the sidewall of the bore hole and avoid the necessity for hands-on guiding of the drill steel. |
