US3754402A - Mine roof supports - Google Patents

Mine roof supports Download PDF

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Publication number
US3754402A
US3754402A US00156013A US3754402DA US3754402A US 3754402 A US3754402 A US 3754402A US 00156013 A US00156013 A US 00156013A US 3754402D A US3754402D A US 3754402DA US 3754402 A US3754402 A US 3754402A
Authority
US
United States
Prior art keywords
support
mine roof
cantilever
arms
pivot
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00156013A
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English (en)
Inventor
Smith D Beaumont
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fletcher Sutcliffe Wild Ltd
Original Assignee
Fletcher Sutcliffe Wild Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fletcher Sutcliffe Wild Ltd filed Critical Fletcher Sutcliffe Wild Ltd
Application granted granted Critical
Publication of US3754402A publication Critical patent/US3754402A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/0004—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor along the working face
    • E21D23/0013—Frame type supports

Definitions

  • ABSTRACT A support means for a cantilever of a mine roof support which cantilever includes two spaced parallel arms, comprising a bar located transversely of and beneath said two arms and adapted to urge said arms upwardly towards the mine roof, said bar being pivoted at approximately its mid-length about an axis parallel to the axes of said two arms, and means to urge said pivot bar upwardly, whereby said arms are able to extend upwardly to different extents due to the pivoting of said pivot bar.
  • This invention relates to mine roof supports and, in particular, to means for supporting a cantilever of a mine roof support which cantilever includes two spaced parallel arms, whether it be a fixed cantilever, a forepoling cantilever, or other known types.
  • pivot bar located transversely of and beneath the I two arms and adapted to urge the arms upwardly towards the mine roof, the bar being pivoted at approximately its mid-length about an axis parallel'to the axes of the two arms, and means to urge the pivot bar upwardly.
  • the arms are able to extend upwardly to different extents due to the pivot bar pivoting about its axis when urging the arms upwardly and when roof problems previously outlined are encountered, so that the arms are in effect urgeddifferentially towards the roof.
  • a roof engaging member constituted by two spaced parallel arms 8 that are pivotally attached, one to each side, of the canopy means 7 on pivot pins 9 and slidably supported by the canopy gether at their forward ends by a cover plate 10.
  • the arms 8 are urged upwardly by a pivot barll located beneath the arms, the bar being provided at its point of contact with each arm 8 with wear pads and, beyond each arm 8, with side members 12 to retain each arm 8 on the pivot bar 11.
  • the pivot bar 11 is pivotally attached, about an axis that is parallel to that of the arms 8, to a pivot shaft 13, carried by a fabricated cantilever bracket indicated generally
  • the cantilever bracket 14 is pivotally attached to the canopy means 6 by transversely extending pins 21.
  • the cantilever bracket 14 includes two pairs of pivot brackets 15, 16, one pair located towards each side of thecantilever bracket and welded to two transversely extending angle irons l7, 18, through apertures in which one end of the pivot shaft 13 passes, to be secured by a pin 19.
  • Adjacent the canopy means 6 are holes 20 in the upper ends of the pivot brackets l5, 16 through which two co-axial pivot pins 21 pass, by which the cantilever bracket is pivotally attached to the roof support.
  • the pins 21 pass through apertured brackets 22 that extend forwardly from the canopy means 6.
  • the lower end of the pivot brackets 15, 16 carry slotted brackets 23, 24 which constitute means for pivotal attachment to each and hence to the cantilever bracket
  • the invention may be readily applied to the cantile- I ver of a support of any of the types mentioned above.
  • the pivot bar may be pivotally located on one end of a pivot shaft, carried by a fabricated cantilever bracket, the latter being provided at each side and adjacent the support with attachment means'for two co-axial pivot pins, and generally beneath these means, with means for pivotal attachment to the cantilever bracket of the free end of a piston rod of a pressure capsule, the cylinder of each capsule being pivotally attached to an upper part of the front of the roof support.
  • a fabricated cantilever bracket the latter being provided at each side and adjacent the support with attachment means'for two co-axial pivot pins, and generally beneath these means, with means for pivotal attachment to the cantilever bracket of the free end of a piston rod of a pressure capsule, the cylinder of each capsule being pivotally attached to an upper part of the front of the roof support.
  • FIG. 1 is a side elevation of a poweredself-advancing mine roof support
  • FIG. 2 is a plan view in the direction of arrowA of a portion of FIG. 1;
  • FIG. 3 is a side elevation of FIG. 2;
  • FIG. 4 is a front elevation of FIG.'2.
  • the mine roof support can be seen to comprise a forward chock leg I mounted on a base means 2 and a pair of rearward chock legs 3 (one only visible) mounted on a base means 4, the two base means being interconnected by a pair of double-acting advancing rams 5 one only visible.
  • the chock leg 1 carries a roof contacting canopy means 6 while the chock legs 3 carry a roof contacting canopy means 7.
  • the roof support operates in a well known manner, while the pivot bar arrangement according to the present invention, for supporting the cantilever portion of the arms 8, enables the arms 8 to extend automatically upwardly to different extents should roof conditions make this necessary.
  • a mine roof support including a main support means for supporting a cantilever section of said mine roof support and urging said cantilever section to the mine roof, which cantilever section comprises at least two spaced parallel longitudinally extending arms each pivotally attached to said main support means said support means comprising a bracket secured to the main support means by transverse pivots and hydraulic ram means carried by an upper part of said support means bracket, said bar being pivotally attached at approxithe same time allowing pivoting action to accommodate side-to-side variation in the mine roof height.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Body Structure For Vehicles (AREA)
US00156013A 1970-06-26 1971-06-23 Mine roof supports Expired - Lifetime US3754402A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3100570 1970-06-26

Publications (1)

Publication Number Publication Date
US3754402A true US3754402A (en) 1973-08-28

Family

ID=10316498

Family Applications (1)

Application Number Title Priority Date Filing Date
US00156013A Expired - Lifetime US3754402A (en) 1970-06-26 1971-06-23 Mine roof supports

Country Status (3)

Country Link
US (1) US3754402A (de)
CA (1) CA942959A (de)
GB (1) GB1294917A (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796853A (en) * 1987-12-22 1989-01-10 General Motors Corporation Remotely configurable solenoid driver circuit for direct pressure electronic transmission control

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1180955A (fr) * 1956-08-18 1959-06-10 Dobson Ltd W E & F Perfectionnements aux supports de plafond pour mines souterraines
GB1037922A (en) * 1962-01-29 1966-08-03 Groetschel Karl Maria Improvements relating to roof supports for mine workings
US3324664A (en) * 1964-04-03 1967-06-13 Gullick Ltd Resilient biasing device for mine roof support props
US3466875A (en) * 1965-04-21 1969-09-16 Karl Maria Groetschel Roof supports for mine workings
US3494135A (en) * 1968-08-02 1970-02-10 Hans Joachim Von Hippel Under load advanceable mine roof support
US3512364A (en) * 1967-06-19 1970-05-19 Wild A G & Co Ltd Pillar and stall mining roof support
US3534559A (en) * 1968-01-17 1970-10-20 Gullick Ltd Mine roof supports

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1180955A (fr) * 1956-08-18 1959-06-10 Dobson Ltd W E & F Perfectionnements aux supports de plafond pour mines souterraines
GB1037922A (en) * 1962-01-29 1966-08-03 Groetschel Karl Maria Improvements relating to roof supports for mine workings
US3324664A (en) * 1964-04-03 1967-06-13 Gullick Ltd Resilient biasing device for mine roof support props
US3466875A (en) * 1965-04-21 1969-09-16 Karl Maria Groetschel Roof supports for mine workings
US3512364A (en) * 1967-06-19 1970-05-19 Wild A G & Co Ltd Pillar and stall mining roof support
US3534559A (en) * 1968-01-17 1970-10-20 Gullick Ltd Mine roof supports
US3494135A (en) * 1968-08-02 1970-02-10 Hans Joachim Von Hippel Under load advanceable mine roof support

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4796853A (en) * 1987-12-22 1989-01-10 General Motors Corporation Remotely configurable solenoid driver circuit for direct pressure electronic transmission control

Also Published As

Publication number Publication date
CA942959A (en) 1974-03-05
DE2131776A1 (de) 1972-01-05
GB1294917A (de) 1972-11-01

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