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4526495 |
Mine roof support assembly
A mobile mine roof support assembly has three mine roof support units coupled together by a common transverse beam. Roller devices are mounted beneath the floor sills of the support units. The...
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4514012 |
Excavatory machine for use in coal and other mining opertions
An excavatory machine for use in coal and other mining, has a pair of rotary cutters for simultaneous presentation to the work. The cutters are mounted on the ends of a medially fulcrumed lever...
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4506931 |
Method and apparatus for mining
A method of mining a mineral deposit from a remote point, particularly useful in mining pitching or horizontal seams, comprises boring, casing and preparing a log of a probe hole; the casing will...
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4505517 |
Self-advancing mine roof supports
A self-advancing mine-roof-support for use in or aligned with a main roadway or gate has a floor-engaging part and a roof engaging part spaced apart by extensible load-bearing prop or jack means,...
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4494617 |
Shaft boring machine
A machine for boring a shaft in earth strata or the like. An annular support ring means having an outside diameter approximately equal to the diameter of the shaft which is selectively engageable...
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4486050 |
Rectangular tunnel boring machine and method
A machine for boring a tunnel having an end face wall, a roof wall, a bottom wall, and opposite side walls. The machine comprises a rotatable cutting wheel means having an annular peripheral wall...
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4483403 |
Shaft drilling machine
A shaft drilling machine has a circularly moving drilling head. The drilling head is angularly oriented with respect to the longitudinal axis of the shaft sought to be drilled. Loosened material is...
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4449755 |
Thin seam mining machine
A low profile thin seam miner includes a main frame mounting a lower transverse axis rotary cutter and a parallel axis conveyor rearwardly of the lower cutter. The main frame also mounts a forward...
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4432665 |
Tunnel driving apparatus
Apparatus for use in driving tunnels or the like comprises a front drive shield composed, for example, of elongate cutter knives supported for longitudinal displacement on a frame. In order to...
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4420278 |
Heading shield
The roof of a heading cut by a continuous mining machine is supported by cantilevered roof beams forming part of a shield. There are at least two sets of roof beams which can be raised and lowered...
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4420188 |
Double shield tunnel boring machine
Front and rear shields are telescopically joined together. The front shield carries a power driven rotary cutterhead means. Thrust rams are provided between the two shields for pushing the forward...
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4396072 |
Method and apparatus for producing a drill hole
Producing a vertical or inclined drill hole by full profile drilling taking place upwardly from a starting location and utilizing a rotatable and displaceable drilling tool and a train of drilling...
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4372618 |
Self-advancing mineral mining installation including tilting machine support
A mining installation includes a self-advancing roof support unit with which is associated a forward base part which is independent of the floor-engaging member of the unit. The forward base part...
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4371211 |
Tunnel boring machine and method of operating same
A tunneling machine adapted to cut tunnels on a continuous basis and to apply continuous pressure on the tunnel face even during repositioning of the gripping legs is disclosed. The machine...
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4363519 |
Continuous mining machine
A mining machine for performing a continuous mining operation in hard rock. The operating portions of the machine are mounted on substantial deck sections hingedly connected to each other to...
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4362337 |
Tunneling system
The system for digging subterranean galeries comprises a cutting tool articulated on a frame and mounted so as to be movable along the height of the mine face. This frame is provided with ground...
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4343512 |
Cutter drive regulation apparatus for a tunnelling machine
Apparatus is disclosed for regulating the capacity of a tunnelling machine. The tunnelling machine is of the type having a rotatable cutting head mounted at one end of an arm. The other end of the...
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4332420 |
Reciprocably supported dual drive member and features thereof
The reciprocably supported member is accompanied by means whereby its stroke can be relocated so that it can be used to drive its support if desired, even while it is simultaneously driving a tool...
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4312541 |
Hard rock trench cutting machine having anchoring and steering structure
There is disclosed a hard rock trench cutting machine comprising a main body assembly and a cutting wheel assembly. A cylinder is transversely mounted on the main body assembly and carries a pair...
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4303275 |
Slideway means and excavating machines comprising slideway means
A slideway arrangement comprises a slideway component and a slide component guidably slidable with respect to the slideway component under the action of a hydraulic ram. At least one of the...
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4302054 |
Cutter unit assemblies for excavating machines and to excavating machines including cutter unit assemblies
The cutting machine body comprises a non-rotary housing mounted on a slideway and a boom carrying rotary housing rotatably supported by annular support means arranged adjacent to a radially outer...
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4286681 |
Bottom plates for walking mechanisms, connected by means of connection pieces
Bottom plates for walking mechanisms for the movement of heavy loads, which bottom plates are connected by means of connection pieces. The bottom plates are elastically connected with connection...
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4278293 |
Apparatus for advancing a low-height drift through a subterranean structure
An apparatus for cutting a flat elongated channel, chamber or passage in subterranean strata, e.g. a crosscut between two mine galleries or shafts, which comprises upper and lower shoes or shields...
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4274675 |
Shaft-sinking apparatus with milling head and central worm conveyor
An apparatus for the sinking of a shaft in which a machine platform can be anchored against the wall of the incipient shaft and carries an orbiting tool for cutting away the floor of the shaft,...
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4272129 |
Mineral mining installation
A mining installation includes a mine roof support the base of which has a forward part on which is located an elevated track on which a mining machine can be supported for reciprocal movement. A...
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4260195 |
Contour miner
A contour miner has walker means carrying an external deck outside the formation being mined having power supply and control means for movement along the periphery of a coal seam with a...
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4256343 |
Mechanism for advancing continuous mining machine through mining cycle and tramming modes
An improved advancing mechanism for a dual auger continuous miner of the type adapted to be advanced by a pair of anchoring jack assemblies, a pair of cables extending from the anchoring jack...
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4240666 |
Device for mining of thick strata of useful minerals
A device for mining thick coal strata comprising a plough pressed in the ion of the floor by a ram, whereas in the vicinity of the roof the plough is pressed by a unit fixed to a canopy of the...
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4240665 |
Conveyor mounted vehicle
A track-mounted vehicle having legs which can be retracted or extended, so that the vehicle can be raised to permit advancement of the track and then lowered, the vehicle either being raisable off...
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4239289 |
Maneuverable full face miner
A full face miner including a simplified conveying arrangement and designed for easy maneuverability into and out of mine sites. A plow operatively mounted to and longitudinally movable with each...
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4232905 |
Tunnelling machine
A tunnelling machine has a swing unit (31) that is swingable about a horizontal axis (I). The swing unit has a head (50) that rotates about an axis (II) that is transverse to said horizontal axis...
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4231618 |
Tunnel-excavating machine
A tunnel-excavating machine in which a chassis carrying a cutting drum is displaceable toward the face of a subterranean structure in which a tunnel is to be formed, the chassis being provided...
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4226476 |
Continuous miner with improved roof-to-floor anchoring canopy units for advancing and turning machine and installing roof bolts
A continuous mining machine comprising a central longitudinally extending conveyor assembly, a pair of cutting and conveying mechanisms mounted on the forward end of the central conveyor assembly...
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4224004 |
Knife shield
A knife shield comprises a plurality of elongate knives which are arranged side-by-side upon a common support frame, the knives defining a generally cylindrical shield. Each knife is supported on...
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4199193 |
Underground mining machine having temporary roof support means and roof bolting means associated therewith
The mining machine consists of a main frame having a front portion and a rearwardly extending portion, and cutter heads disposed for movement across the front portion for dislodging mineral. A...
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4189186 |
Tunneling machine
A diametrically compact tunneling machine for boring tunnels is disclosed. The machine includes a tubular support frame having a hollow piston mounted therein which is movable from a retracted...
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4185873 |
Machine for mechanically advancing clean cut underground mining galleries of various profiles
A method for mechanically advancing clean cut underground mining galleries of various profiles, in which during a primary phase of the operation a pilot excavation of circular cross-section smaller...
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4178111 |
Apparatus for the excavation of subterranean tunnels
Tunnel excavating apparatus comprises a hollow cylindrical shield adapted to be axially forced through subterranean material and having a circular cutting edge at a leading end portion. An inclined...
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4169629 |
Tunneling machine with plural adjustable arms carrying single cutter
Machine for the digging of passages, galeries or tunnels in underground work, of the type in which the stoping device consists of a single stoping drum or mill of which the axis of rotation is...
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4165129 |
Shield tunneling machine and method
Shield tunneling machine and method which may minimize the variation in water- and earth-pressure at the tunneling face so as to hold the ground firm and to ensure the safe tunneling.
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4141414 |
Device for supporting, raising and lowering duct in deep bore hole
A duct section or other load to be moved axially along a bore hole has two reciprocating drivers mounted on it and two sets of gripping elements. Each driver reacts axially between the load and a...
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4140345 |
Tunnel-excavating machine with shield formed of segments
A tunnel-excavating machine comprises an excavating head, preferably a full-cut head, adapted to excavate the full-cross-section of the tunnel to be formed, which is slideably mounted for movement...
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4131317 |
Mining machine having advancing mine roof supports
The mining machine has a body portion mounted on a pair of endless propelling tracks which advance the mining machine forwardly in the mine. Pairs of forwardly extending arm members are pivotally...
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4127303 |
Coal mining method at a long-walled pit face of the coal mine
A coal mining method at a long-walled pit face of a coal mine comprises combining self-advancing supports with a conveyor which is arranged along the long-walled pit face and on which a shearer is...
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4123109 |
Mining method
A tabular mineral deposit is mined by drilling overlapping holes in the plane of the deposit, the first hole being drilled in any convenient manner and each subsequent hole being drilled by a box...
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4122683 |
Tunnel drive shield
A tunnel drive shield is provided with a plurality of bracing units spaced around its periphery. The bracing units are expansible against the surrounding tunnel wall to control the direction of...
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4120368 |
Supplying motive fluid to below ground tool drive from a pressurized bore hole
A bore hole to be deepened far into air-impermeable bedrock has an air-tight lining and an air lock in its upper portion, and it is pressurized below the air lock. A duct comprising endwise...
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4119346 |
Longwall mining system
This mining system utilizes a row of roof support units in conjunction with a row of conveyor sections and a continuous mining machine which rides on the conveyor sections. Each roof support...
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4118072 |
Variable wall mining machine
A variable wall mining machine to release coal from a longwall mine face includes an articulated auger assembly made up of a plurality of side-cutting auger sections joined together by universal...
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4113316 |
Funneling machine with inclined advancing rams
A vehicle for use in mine workings for enlarging a tunnel or for forming a heading and comprising a wheeled chassis having a rock breaker and a bucket loader mounted thereon further includes a...
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