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8162569 |
High-strength anchor system, safe room bulkhead, and method of anchoring a support to mine strata
A high-strength anchor system for anchoring a support to mine strata is disclosed. The system includes an anchor plate and a connecting member on the anchor plate for connection of the support to...
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8070394 |
Versatile grout bag type of underground support
A support assembly (1) is provided for the roof or hanging wall (36, 114) of an underground mine. The assembly comprises at least one support elongate (30) and a grout bag (2, 60, 80, 90, 102, 108,...
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8021083 |
Grout pack assembly
The invention provides a grout pack assembly having a plurality of elongate elements shaped to extend about a grout pack and which are characterized in that they are configured to control...
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7896581 |
Re-tensionable cable bolt apparatus and related method
A re-tensionable cable bolt and related methods are provided. In one aspect of the invention, the bolt includes a sleeve for connecting or securing to a cable. The sleeve includes a lower end...
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7789593 |
Grout pack restraining system
The invention provides a grout pack restraining system, comprising a plurality of elongate elements shaped to extend about a grout pack and which are characterized in that they are configured to...
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7712838 |
Ground support insertion tool
An improved ground support member insertion device comprising means for attaching the device to a jackleg drill, a clutch assembly disposed adjacent to the attaching means and adapted for holding a...
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7654777 |
Grout pack restraining system
The invention provides a grout pack restraining system, comprising a plurality of elongate elements shaped to extend about a grout pack and which are characterized in that they are configured to...
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7585460 |
Method for inhibiting the biological acidification of water in contact with materials containing sulfur
The invention relates to a method for inhibiting the biological acidification of water which is in contact with materials containing sulfur in reduced form or with elemental sulfur, susceptible to...
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7490440 |
Support device for a rib
A support device (8) for a rib (14) between a floor (18) and a roof (16). The device includes an expansion means (10) and a pair of resilient members (12a, 12b). Each of the resilient members (12a,...
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7438506 |
Jack for carrying and installing mine panels
A jack includes a base, a guide extending from the base, and an extensible member having an extensible fit with the guide and extending from the guide to have a free end. A support is located at...
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7357458 |
Boring rig
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...
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7207632 |
Shield system for coal mining
A mining system for remotely mining ores and minerals which protects against falling rock and allows evacuation of a miner and conveying system in the case of a cave in. A shield is advanced into a...
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7097389 |
Forklift movable cribbing column
A prefabricated cribbing column for supporting a mine roof. The column includes a plurality of concrete cribbing elements the majority of which are interleaved with load transfer disks. Two of the...
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6966610 |
Treatment of rock surfaces
A method for providing a protective coating in a mine comprising spraying onto the rock surfaces of the mine a hot melt adhesive in an amount to form a coating at least 1 mm, preferably at least 2...
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6942301 |
Method for boring and placing bolts for imbedding adhesively and device for carrying out this method
A method and device for drilling and setting adhesive anchor bolts close to the mine face during the cutting operation of a tunneling or mining machine which is capable of being displaced on a...
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6910834 |
Mine prop
A mine prop is comprised of an elongate tube having a slenderness ratio that would generally allow buckling or kneeling of the elongate tube when exposed to a sufficient axial force. A plurality of...
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6851757 |
Mining method
A method of mining an underground ore body includes the steps of: excavating a plurality of laterally spaced first, ventilation tunnels in the ore body using an auger mining machine; excavating a...
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6785988 |
Driving or mining machine
A driving or mining machine includes a pivotable cantilever arm that is hinged so as to be pivotable in the height direction to a pivoting mechanism capable of being pivoted about a substantially...
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6729806 |
Crib platform device, kit and method of using
A crib platform device, kit and associated method of using for building a temporary buttress underneath an overhanging obstruction. The crib employs a two platforms, and a lock bar for reversibly...
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6695543 |
Method for filling voids with aggregate material
A method for filling a void using an aggregate material, such as mine tailings, the fill material being pumped from a site which is located remote from the void. A fluid, aerated material is formed...
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6655877 |
Yielding column
A yielding column for support mine roofs or the like includes a tube provided with one or more circumferential rows of slots which provide a preferred locus for buckling. A reinforcing sleeve...
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6586497 |
Transport of solid particulates
A method is provided for incorporating a foaming agent into mixtures of particulates and then forming a foam within the mixture to increase the flowability of the particulates. A method is also...
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6520718 |
Sardine-bone construction method for large-section tunnel
This invention relates to a method for boring a large-section tunnel safely and quickly by reinforcing and improving in advance the ground over the full length of the tunnel section, which...
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6481933 |
Powered support frame for large seam thicknesses with controlled gap sealing plates
It is provide in a powered support frame, for large seam thicknesses with controlled gap sealing, that double acting gap cylinders (16, 27, 30) of several gap sealing elements (15) on a powered...
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6428107 |
Heat added to underground cemented fill to obtain both early and long term strength increases
A method and apparatus for increasing the early and long term strength of underground cemented backfills includes adding heat to the backfill. A cementitious binder is mixed with a sand component...
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6352392 |
Mine roof support crib having only two or three planes, and method
A mine roof support crib. The crib includes a plurality of chocks that are connected together through notches in the chocks to form only three planes with at least two of the planes in...
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6322293 |
Method for filling voids with aggregate material
A method for filling a void using an aggregate material, such as mine tailings, the fill material being pumped from a site which is located remote from the void. A fluid, aerated material is formed...
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6322292 |
Backfilling underground voids
A method for filling an underground void, such as a mine stope, without danger of causing mud slides therein, with the material being pumped from a site which is located remote from the void. A...
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6196635 |
Method of installation of cuttable mine support
A method and apparatus are provided for installing a mine support (pillar, or pillar and grout bag) in a mine. The following are practiced: Locating a form in the mine where it is desired to...
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6109700 |
Mine roof bolting apparatus and method of using the same
A modular roof bolting apparatus adapted to be installed on a face conveyor track of longwall mining equipment. A roof drilling assembly is rotationally mounted on a platform to an operating...
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6086289 |
Mini drainage immobilization system and method
The present invention relates to an apparatus and in-situ method for immobilizing mine drainage from spent mine works. This apparatus and preferred method are readily adapted for use in any mine,...
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5836089 |
Excavating equipment fitted with surface clamps
Excavating equipment comprising a rigid support structure with articulately mounted surface clamps, an excavating device downstream of the surface clamps in a direction of excavation and an urging...
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5782539 |
Wall-to-wall surface mining process
A mining process that consists of a combination of surface mining and underground mining techniques carried out in a novel extraction sequence. The coal seam is first mined by surface-mining...
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5769504 |
Equipment for shortwall mining useful for extraction of pillars in underground coal mines
Shortwall mining equipment for extraction of some pillars in an underground coal mine has a series of self-advancing powered roof supports (1) for placement along the pillars (2) under extraction,...
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5746547 |
Mine support cribs
The invention is concerned with a mine support crib of the type which comprises a series of superimposed layers of elongate chocks. There is a plurality of parallel, spaced apart chocks in each...
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5669739 |
Prestressing of mine props
The mine prop prestressing device (10) has a tube (12), a cup-shaped member (14) inside the tube which has a base (18) and a cylindrical side wall (20) fixed internally to the wall of the tube. A...
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5584611 |
Roof support for underground excavations
The present invention is directed to a movable load support used for supporting the roof in underground excavations. The load support includes a primary roof support carried on a base frame and an...
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5567018 |
Continuous mining linear advance system
A continuous mining linear advance system comprises a dual action drum cutter for removing coal from a face of the entry. The dual action drum cutter removes the coal from the face by shearing...
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5522676 |
Undercut excavation method
An excavation method is provided, which is particularly suitable as an undercut-and-fill mining method, wherein posts are inserted into the ground and are used to support a concrete floor of the...
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5380127 |
Non-entry method of underground excavation in weak or water bearing grounds
A method of excavating an underground area liable to flooding or collapsing during excavation, wherein the area is susceptible to disaggregation by high pressure water jet and is located above rock...
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5368369 |
Equipment useful for winning ores particularly coal in longwall mining
The present invention relates to an improved equipment useful for winning of ores particularly coal in longwal mining, the equipment comprises hydraulic master chock shield having atleast two legs...
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5137337 |
Method for working steeply dipping vein ores with vertically downwards propagating pillars
The invention relates to a cut-and fill method of a mine, where the working is done by pillar working, which propagates vertically downwards. The working is done by placing the stope and the...
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4986696 |
Method of dewatering a subterranean space, especially a mine
A method of dewatering a subterranean space, especially a mine, comprising artificially tapping a water storage zone or collecting water of imbibition and flooding a refill zone, which is separated...
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4979780 |
Mining or underground quarrying method and installation for implementing same
In a mining or underground quarrying method by downward slicing under a roof, the roof is divided into a plurality of areas supported independently of one another. As the core is mined from under...
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4974689 |
Drill hole filling method and apparatus
A drill hole filling method involves drilling of a hole by using a tubular drill rod through which, in the course of drilling, a flushing medium is supplied through at least one opening in a...
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4964675 |
Method of electro-hydraulic control of longwall mine units
A method of electro-hydraulic control of the cutting and self-advancing mine-roof support units in an automated longwall is carried out in dependence on the measured lengths to which the rams...
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4957327 |
Methods of translating a face support
Methods are provided for translating a face support comprising a plurality of support units arranged side-by-side at an initial position. In the first embodiment, a first pair of alternately...
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4904125 |
Process for strengthening geological formations
The present invention is directed to a process for the strengthening of geological formations in underground workings and mines by the introduction of reaction mixtures which react to form...
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4892446 |
Group control means for hydraulic mine-roof supports
An electro-hydraulic control system for self-advancing mine-roof supports in a high-output longwall mine is used to form a sequence zone behind the mining machine whereby individual supports...
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4889191 |
Gooseneck assembly for rock drill and method for inserting friction rock stabilizer
A gooseneck interposed between a rock drill and supporting jack leg includes an offset pivot bearing for the rock drill and an adjacent pin to facilitate initial insertion of a friction rock...
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