Abstract: A hydraulic drilling machine has a metal chassis shaped as a rectangular parallelepiped, drilling resources located at the front of the chassis, a rotary motor to drive drilling rods, and a hydraulic circuit. An electrical circuit powers the various components of the drilling machine. The machine can be mounted on the arm of a hydraulic mini-digger and operate without an extra hydraulic unit.

Abstract: A hydraulic drilling machine has a metal chassis shaped as a rectangular parallelepiped, drilling resources located at the front of the chassis, a rotary motor to drive drilling rods, and a hydraulic circuit. An electrical circuit powers the various components of the drilling machine. The machine can be mounted on the arm of a hydraulic mini-digger and operate without an extra hydraulic unit.

Abstract: A telescopic feed beam for a rock drill includes a lower beam and an upper beam arranged to move with respect to each other in the longitudinal direction. The cross section of the lower beam is such that there is a groove-like open space at the bottom of the lower beam and a transfer cylinder between the lower beam and the upper beam is mounted in the groove.

Abstract: A hydraulic drilling machine has a metal chassis shaped as a rectangular parallelepiped, drilling resources located at the front of the chassis, a rotary motor to drive drilling rods, and a hydraulic circuit. An electrical circuit powers the various components of the drilling machine. The machine can be mounted on the arm of a hydraulic mini-digger and operate without an extra hydraulic unit.

Abstract: A boring rig (14) for underground boring for excavating purposes and including a substructure (21, 22), a propulsion device, a stabilizing device (31, 32, 35, 36, 37, 38, 39, 42), and a boring unit (20) having a cutter head (29) and a rotation and forcing device (26), in which the rig has a first direction of general travel and two sideways directions, and in which the boring unit (20) is pivotally attached to the substructure for pivotal movement of the boring unit into an operating direction. The stabilizing device includes horizontal (31, 32) and vertical (35, 36, 37, 38, 39) stabilizing elements that are attached to the substructure (21, 22) in order, in active positions, to be pressed against an adjacent rock face so as to transmit forces from the boring unit (20), that are occurring during boring, to the rock face.

Abstract: A process to transport and assemble a drilling or workover rig substructure. The process includes the steps of transporting a driller side substructure section and an off driller side substructure section to a rig site so that the sections are spaced from and parallel to each other. A center substructure section is transported to the rig site. The center substructure section is moved into a space between the driller side and the off driller side sections. The center substructure section is thereafter connected to the driller side and to the off driller side subsections. A floor of the driller side substructure and a floor of the off driller side substructure are raised while both connected to the center substructure section from a transport position to a use position while maintaining the floors parallel to the bases.

Abstract: An arrangement in a rock drilling apparatus comprising supports (5) directed toward the rear part of the feed, the supports being moveable by means of support cylinders (6) to support the feed during the drilling operation. The arrangement comprises a pressure detector (9), which is arranged to detect the pressure of the pressure fluid in the support cylinders (6) and to make the control unit supply more pressure fluid to the support cylinders (6) when the pressure drops below a pre-set threshold value.

Abstract: An earth boring machine 10 with a frame and a linearly movable slide 22 on the frame has an apparatus for holding and rotationally driving a boring rod 24, and a forward feed drive for moving the slide parallel to the boring direction. The machine with especially small space requirement creates a large force for movement of the slide 22 in and opposite to the forward feed direction. Moreover, the forward feed drive of the earth boring machine 10 has a rotationally drivable forward feed spindle 20 arranged on the frame 18, which spindle is received by a spindle nut non-rotationally connected with the slide 22.

Abstract: A self-propelled percussion boring tool apparatus (10) and method for incrementally boring a generally vertical hole (12) to substantial depths. The boring tool (10) includes a torpedo-shaped elongated cylindrical casing (13) having a trailing pipe (22) coupled to and extending away from the back end (14) of the casing (13). In another instance, the boring tool (10) includes a trailing pipe (34) extending away from the back end (14) of the casing (13), and formed to be retained in the hole (12) after removal of the boring tool (10). In either arrangement, the present invention facilitates recovery of the boring tool (10) from bored vertical holes (12) of substantial depth.

Abstract: A mining roof bolt drill feed mechanism whereby the drill is supported on a horizontal pylon extending from an elongate slot in a vertical box section inner strut. The inner strut telescopes within an outer box section strut with an aligned elongate slot, and the pylon is supported on the nut of a dual concentric worm and nut drive system located within the telescopic struts. Elastomeric seals are provided over the elongate slots to prevent the ingress of dust from the mining operation.

Abstract: Apparatus for cleaning accumulated spent alumina, dross, aluminum pads, refractories and carbon rods from an aluminum cell including a first platform supported on outrigger members for spanning the open top of the aluminum cell. The ends of the outrigger members carry edge clamping and traveler devices thereon which are alternately activated by hydraulic cylinders. In a locked position, the outrigger arms resist lateral and upward forces imposed by the digging and cleaning tools of the apparatus. In an unlocked position, the traveler devices support the outrigger members on an adjacent surface for movement along the cell. A turntable carrying a second platform is rotatably mounted on the first platform to permit 360.degree. rotation of the second platform. A mounting head is pivotally mounted on the second platform and carries an elongated extensible boom for controlled 360.degree. rotation about the longitudinal axis of the boom.

Abstract: A supporting arrangement for a feed device for a drilling machine of a rock drilling unit (2) comprising a feed device (3) for a drilling machine (4), a cradle (5) supporting the feed device longitudinally displaceably and a supporting device (10) which is extendable in parallel with the feed device for supporting the feed device against a tunnel wall. The supporting device is supported by the cradle so that it remains stationary with respect to the cradle when the feed device is displaced.

Abstract: A mineral mining installation comprises a mine roof support assembly and apparatus for drilling bores. The roof support assembly comprises a plurality of roof support units positioned side-by-side, and the drilling apparatus comprises a drilling device which is movably guided on a track associated with the roof support assembly. Each of the roof support units has at least one roof bar. The track is arranged on the underneath sides of the roof bars of the roof support units. The drilling device is pivotally mounted on a trolley which is movably guided on the track.

Abstract: A horizontal deck extends forwardly from a self-propelled body portion. An elevating mechanism pivotally connects the deck to the body portion for vertical movement of the deck into and out of position on the mine floor. A mast-type roof drilling unit is mounted on the front of the deck and includes a vertically movable drill pot for advancing a rotating drill rod into the mine roof for drilling a bore hole therein. The deck is positioned on the mine floor during the drilling operation. During tramming of the body portion the deck is raised to an elevated position above the mine floor. A roof support assembly is supported by telescoping devices above the deck to provide overhead protection for the machine operator during the drilling and tramming operations. During drilling the roof support assembly is raised to abut the mine roof and support the mine roof above the operator on the deck.

Abstract: In an apparatus for drilling long holes in the surface of a rock bed for installation of roof bolts where the working distance perpendicular to the surface is limited, a flexible, segmented shaft drill string is fed along a curved path to a mechanism positioned directly under the working surface. The mechanism straightens the drill string perpendicular to the surface, and supplies torque and thrust to the string to drill the holes. Since torque and thrust are supplied to only the straightened portion of the drill string, rather than to the curved portion, greater thrust is imparted to the drill head with minimum wear of the segments. A special guide sleeve, mounted to a rigid starter section of the drill string behind the head, guides the string along a straight path in the rock.

Abstract: Method and apparatus for driving metal pins into a rock face in an underground mine to strengthen rock surfaces such as stratified overburden, or rock ribs, against failure. A cylinder containing a pin with its head resting on a driven member, and having lateral support within the apparatus, is positioned against the rock face to be pinned. The pin is then driven into the rock by a combination of pressure and vibration at sonic frequencies applied longitudinally to the pin to thus strengthen the rock face against collapse.

Abstract: Feed frame assembly for supporting and feeding drill head which rotates drill rod about axis. Assembly includes spaced front and rear end members, laterally spaced longitudinal members and first and second hydraulic feed cylinders. Longitudinal members and feed cylinders extend between end members and are parallel to rod axis. Piston rods of feed cylinders have double-acting pistons cooperating with cylinder bodies to feed head along the piston rods. Stabilizer cylinders in longitudinal members force bearing pads against rock face to counteract the drilling forces. Head mounting means secures rigidly one side of drill head to first cylinder body, and secures releasably with latch opposite side of head to second cylinder body. When latch is released drill head can swing outwards about first piston rod, and when engaged mutual actuation of feed cylinders moves drill head along rods. With head swung out, first cylinder is hydraulically locked to divert fluid to second cylinder.