Abstract: An apparatus for drilling short and long holes and for fitting bolts to the short holes has a generally stationary support positioned adjacent the face and a turret angularly displaceable on the support between two end positions about a longitudinal turret axis. A drill slide longitudinally displaceable on the turret carries a drill having a rotatable stem centered on a drill axis parallel to the turret axis. A drill bit can be fitted to the stem. A bolt slide longitudinally displaceable on the turret adjacent the drill slide carries a bolting unit having a ram centered on a bolt axis. A magazine mounted on the support adjacent the turret has a plurality of seats adapted to hold the bolts and extension rods fittable between the bit and the drill stem, depending on whether the device is to be used for short-hold drilling and bolting or for long-hole drilling.

Abstract: This turret has a head 6 enabling, after the drilling of a hole 15, the injection of a resin cartridge without modifying the position of the turret 1. A movable member 8, displaced by a jack 14, has a first passage 11 traversed by the drilling rod 4, and a second passage 12 connected to the hose 13 for the injection of resin cartridges. After the drilling of the hole 15 and the retraction of the drilling apparatus 2, the movable member 8 is displaced such that the drilling rod 4 is laterally retracted by bending. The second passage 12 is simultaneously brought in line with the axis of the hole 15 so as to enable the injection of one or more resin cartridges.

Abstract: A turret for mining appliances comprises a girder serving as a guide for a drilling carriage and a bolting carriage, which is mounted to pivot and slide along an axis at the end of a support arm. The girder is integral with two bearings, mounted to rotate freely and to slide on a tube provided with an anchoring point and integral with a support box articulated on the arm. The two bearings are connected by a second tube which passes through a connecting-rod which is mounted to rotate but prevented from moving longitudinally on the first tube, the pivoting of the turret being controlled by a jack pivotally connected on the one hand to the box and on the other hand to the connecting-rod. The withdrawal of the girder is controlled by another jack housed partly in the first tube.

Abstract: A feed device on a drilling and bolting turret retains anchoring bolts, before they are driven into a bore in a subterranean structure. A centering member is supported by the front part of the turret and comprises a cylindrical housing into which a circular support plate of a bolt is introduced. The shank of the bolt is introduced laterally through an aperture in the centering member. A clamping jack of the rotary and linear type, actuates a push-rod which, when it is located opposite the centering member, makes it possible to push the plate of the bolt to the bottom of the housing and retain it there.

Abstract: The body of a bit guide assembly is mounted on a base which pivots on a frame about a first pivot point and may thus be retracted in order to allow the passage of the anchoring bolt screwed after drilling a hole. A double-acting jack has its rod pivoted on the base, whereas its body is pivoted on a dog, in turn mounted to pivot on the frame about a second pivot opposite the pivot point. The dog comprises a locking tooth which cooperates with the end of the base remote from the first pivot point. The free end of the dog cooperates with a retaining tooth formed on a connecting-rod, mounted to pivot about a fixed pin and biased by a spring against a stop. The same jack thus controls the retraction of the bit guide, for bolting and its locking in the lowered position, for drilling.