A rock drill feed support beam comprises longitudinal side plates and a base member which are formed of folded metal plate welded together to form a channel-like support beam with a substantially clear unobstructed space between the members for containing a plurality of pressure fluid hoses which are trained over a hose guide supported by the feed beam and also disposed generally between the side members in the space. A feed mechanism comprising an endless chain is disposed in the channel-like space and includes a support member connected to the hose guide and supporting spaced apart sprockets. One run of the chain is connected to the drill motor and the opposite run of the chain is anchored to the feed beam. A motor is drivably connected to the chain through one of the sprockets for advancing the drill motor at twice the rate of the hose guide and the feed support member.
Drilling apparatus which comprises support structure mounted guide tracks which extend in a drilling direction. A rotating and pushing unit is mounted on said guide tracks for movement in the drilling direction. The apparatus is provided with a series of members for adjusting the height of the rotating and pushing unit in relation to the guide tracks, the members extending in the drilling direction and allowing the rotating and pushing unit to glide in the drilling direction.
