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7775748 |
Shield support
A shield support for underground mining has a slider and a roof bar between which a ram is arranged, with an inclination detector being provided with which the inclination of the roof bar can be...
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6395359 |
Power cylinder non-metallic liner seal assembly
Corrosion resistance is provided for a power cylinder by providing a preloaded molded urethane elastomer sleeve liner within an outer cylinder of material such as a copper/nickel alloy which is...
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5961254 |
Hydraulic advancing support frame
An advancing support frame is connected to the face conveyor (9) via an advancing rod (7) engaging with the advancing cylinder (5). A lifting cylinder (10) is supported on the advancing rod (7),...
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5348425 |
Piston cylinder device with a protective coating and method of producing such a coating
A method is described for protecting piston cylinder devices against corrosion by a pressure resistant thermoset or cured material coating. At least the outer and inner cylindrical surfaces, for...
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5252006 |
Mine roof support
A mine roof support employs a pair of floor skids carrying hydraulic props on which a roof-engaging structure is mounted. A goaf-shield is pivotably mounted to the roof-engaging structure and is...
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5190414 |
Walking prop for mine tunnels
A walking mining prop has a skid-lifting assembly in the region of the ram which braces the roof cap with respect to the skid formed by a bridge from which lifting cylinders are articulated and...
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5133626 |
Mobile stope support apparatus
The mobile stope support apparatus comprises a number of individual units (10) which are interconnected by hydraulic cylinders (12). Each of the units (10) has a series of upright, double-acting...
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5100263 |
Mine roof support assembly
A mine roof support includes a ground engaging base section, a roof engageable canopy, and hydraulic props for raising and lowering the canopy relative to the base section. An advancing mechanism...
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5039257 |
Mine roof supports
Mine roof support comprising a base including a pair of skids, a roof engaging canopy, jacks acting between the base and the canopy, an auxiliary jack connected to the base for lifting or lowering...
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4946316 |
Method and device for moving a shield-type support trestle
A method and device is provided for the moving of a shield-type support trestle 1 having stamps 4, 5 arranged between a roof pressure cap 3 and a lying skid 2, a pushing ram 6 is in the lying skid...
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4662796 |
Supporting pillar for mines
The invention relates to a travelling support pillar for use in underground mines.The support pillar has a link subjected to the action of a positioning jack. The positioning jack extends between a...
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4605341 |
Mine roof support and attachment means therefor
Attachment means are provided for attaching a mine roof support to an abutment, (e.g. a flexible conveyor) the attachment means comprising a ram arrangement in the form of at least two rams 25, 26...
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4600340 |
Mine roof support unit
A mine roof support unit includes a pair of generally parallel floor girders, and an advance mechanism positioned between the floor girders. The advance mechanism comprises a hydraulic advance ram...
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4568222 |
Mine-roof supports
A mine-roof support has a floor beam, an advancing ram and a relay bar. A bell-crank lever is pivotally-connected to the floor beam and the advancing ram is pivotally-connected to the bell-crank...
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4557635 |
Shield-type support frame
A shield-type support frame for serving as a face support in underground mining operations having a bottom structure, a one-piece roof cap, at least one hydraulic plunger connecting the bottom...
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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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4480946 |
Gob canopy for a mine roof support
A support for the roof in longwall mining operations includes a gob canopy at the rear of a roof canopy. The gob canopy can move about a vertical pivot and a horizontal pivot by operation of a...
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4380410 |
Mine-roof support
A self-advancing mine roof support has a beam-like abutment adapted to be disposed generally adjacent and parallel to a work face. Three roof support elements are spaced apart along the abutment...
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4348138 |
Sliding supporting gallery
A gantry support for supporting a roof of a passage is advanceable along a floor of the passage. The support has two parallel supporting elements mutually spaced apart laterally of the support,...
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4311417 |
Mine roof support
A self-advancing, hydraulically powered mine roof support comprises a base means, a double-acting hydraulic advancing ram extending in the intended direction of advance of the support in use, the...
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4307982 |
Mobile mine roof support system
A mobile self-propelled mine roof support system employing pairs of individually self-propelled roof support units movable along opposite ribs of a mine room to follow an advancing mine face. Each...
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4274764 |
Mine roof supporting system
A stabilizing arrangement for mine roof support systems of the type in which a series of support units, each including a transverse beam supported at opposite ends by extensible props, are...
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4118939 |
Mine roof support
This invention provides a mine roof support in which the cover, or canopy, is connected to a framework in such a way that the canopy can tilt relatively to the framework both in the fore-and-aft...
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4094153 |
Breast roof support system for longwall mining
In a longwall mining operation the roof of the breast extending laterally from a heading or gangway is supported by at least two pairs of pit props. Each pair is substantially identical, having an...
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4062194 |
Mine roof supports
A roof-engaging assembly for a mine roof support having prop or jack means to engage and support the roof-engaging assembly, comprises a rigid part to engage said prop or jack means, and a...
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3928981 |
Mine proof support
A roof support for use in a mine comprising, a roof-engaging canopy, a floor-engaging beam, a plurality of variable length struts extending between the floor beam and the canopy, and guide means...
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3890793 |
Support advancing apparatus for mines
An advancing support system which is adapted to follow the dip of a longwall in an underground mine operation, comprises an abutment made up of a plurality of individual beams which are arranged in...
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3855802 |
WALKING SUPPORTING PIER FOR COAL MINES
A walking supporting pier for coal mines comprising two props mounted on a common lower frame on a wall, the lower frame supports a common upper frame extended by a front shield which is pivotally...
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3811288 |
TRAVELING FACE SUPPORT WITH AN ATTACHED EXTENSIBLE SHIELD
A travelling face support has an attached extensible shield which, besides providing the means of shoring up the roof of the seam and providing a connected coal cutting shield, has both a packing...
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3748861 |
MINE ROOF SUPPORT WITH MEANS FOR LIFTING THE BASE ELEMENTS
The invention provides an advancing mine roof support in which successively advanced units each comprise a base element, hydraulic props thereon and a superstructure carried by the props with the...
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3748862 |
ROOF SUPPORT FRAME
A roof-support frame for use in mines comprising front and rear upright hydraulic props which support, at their upper ends, an articulated roof-support beam having two pivotally-connected beam...
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3651652 |
SUPPORT ASSEMBLIES FOR MINERAL MINES
A support assembly with two frames each having telescopic props carried by base members pivotably interconnected to a rigid member disposed therebetween. The rigid members are connected through a...
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3550383 |
SUPPORT PIERS FOR MINES
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3494135 |
UNDER LOAD ADVANCEABLE MINE ROOF SUPPORT
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3488966 |
MINE ROOF SUPPORTS
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3606758 |
HYDRAULIC PIT PROP ARRANGEMENTS
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3563040 |
CONNECTING DEVICE FOR ROOF SUPPORT FRAMES
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3438209 |
ROOF SUPPORT ASSEMBLY OF THE TYPE USED ON THE LONGWALL FACE OF A COAL SEAM
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3435620 |
WALKING MINE ROOF SUPPORT
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3431737 |
HYDRAULIC ROOF SUPPORTS
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3415065 |
Advanceable mining prop arrangement containing stabilizer means
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3399927 |
Self-advancing mine roof support including a protective mat for the roof
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3397544 |
Mine roof support
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3383867 |
Mine roof supports
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3367117 |
Mine roof support
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3347050 |
Traveling hydraulic mine roof propping apparatus
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3344610 |
Self-traveling propping apparatus
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3342034 |
Roof supports
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3333809 |
Hydraulic chocks
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3333426 |
Self-advancing hydraulically extensible mine roof supports
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