US3800546A - Mine roof support frames - Google Patents

Mine roof support frames Download PDF

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Publication number
US3800546A
US3800546A US00243943A US3800546DA US3800546A US 3800546 A US3800546 A US 3800546A US 00243943 A US00243943 A US 00243943A US 3800546D A US3800546D A US 3800546DA US 3800546 A US3800546 A US 3800546A
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US
United States
Prior art keywords
fender
spigot
shear pin
frame according
roof girder
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
US00243943A
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English (en)
Inventor
N Holken
H Meya
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.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Application granted granted Critical
Publication of US3800546A publication Critical patent/US3800546A/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
    • E21D23/0454—Trailing plates; Coal face or goaf side sprags
    • 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

Definitions

  • the spigot has a support shoe which engages the fender to retain the latter in aworking position.
  • a shearpin extends through the guide piece and the spigot and the pin is designed to fracture when the fender is subjected to excessive loading to cause the spigot to slide inwardly of the guide piece to thereby allow the fender to pivot inwards to a near vertical position.
  • the invention relates to a mine roof support frame, 5 especially but not solely, to such frames as employed in the so-called walking roof support systems.
  • fenders serve to prevent the goaf or stowage material from entering the longwall space adjacent the mineral face being worked.
  • these fenders are apt to be damaged as a result of the high pressure exerted by the bulk of the stowage material.
  • the pertinent support arrangements and also the roof girders can also be damaged. It is not possible to reinforce the fenders to a sufficient extent to preclude all danger of damage since the restrictions on space imposed on equipment for mine workings is severe.
  • the invention provides in a mine roofsupport frame with a plurality of props a roof girder carried by the props and a fender connected to the goaf-side end of the roof girder; the improvement comprising support means for supporting the fender at a first working position in relation to the roof girder and means for causing the fender to move from said first position to a second position in relation to said girder when the external loading force on the fender exceeds a pre-determined value.
  • a mine roof support frame comprises a plurality of props; a floor rail interconnecting said props; a roof girder carried at the upper ends of the props; a fender pivotably connected to one end of the roof girder; a guide piece connected to the roof girder; a spigot slidably received within the guide piece and engageable with the fender; and a detachable sheer pin extending through the guide piece and the spigot.
  • the sheer pin is designed to fracture when the load on the fender becomes intolerably high to allow the spigot to slide inwardly of the guide piece until the fender pivots inwardly of the girder to a near vertical position where a wall surface of the guide piece provides a delimiting abutment face preventing further pivoting of the fender. In this innermost near vertical position the fender is still effective to screen off the stowage material.
  • The'guide piece may be carried on a plate which is attached to a series of parallel shaped webs so as to dispose the spigot in an inclined position.
  • a further plate also attached to the webs may serve to connect the supplates and webs can be provided on the underside of a 1 single roof girder or where the invention is applied to parallel frames to the undersides of adjacent roof girders.
  • the guide piece may locate two bushes which receive end portions of the shear pin and the spigot has a transverse bore aligned with these bushes. It is preferable to provide the sheer pin with grooves or notches to produce deliberately weakened regions.
  • a support shoe is disposed at an end of the spigot, said shoe serving to engage the fender. It is desirable for this shoe to be articulated to the spigot.
  • FIG. 1 is a side view of part of a mine roof support frame made in accordance with the invention
  • FIG. 2 is a part-sectional enlarged side view of the fender support means of the frame shown in FIG. 1;
  • FIG. 3 is an end view of part of the support means shown in FIG. 2;
  • FIG. 4 is a section taken along the line IV-IV of FIG. 3.
  • a mine roof support assembly made in accordance with the invention is composed in known manner, of several telescopic props interconnected through a resilient floor rail at the floor region of the mine working.
  • the numeral .10 denotes one of the props and the numeral 11 denotes the floor rail which is in the form of a pack of leaf springs.
  • a roof girder 12 is carried at the upper ends or heads 13 of the props 10.
  • the girder 12 is composed of a plurality of pivotably interconnected parts which are supported on the heads 13 of the props 10 in the manner of a universal joint denoted 14.
  • a goaf or stowage fender 16 At the goaf side end 12 of the gider 12 there is provided a goaf or stowage fender 16.
  • the aforesaid end 12' is bifurcated and the fender 16 is pivotably supported on a spindle 15 which is received in holes 17 in the bifurcated end 12' of the girder 12.
  • the fender 16 itself is of hollow box-like construction and is reinforced transversely by means of interior ribs or the like. A shield is suspended from the fender 16.
  • the fender 16 can take otherconstructional forms. I
  • the fender 16 is held in a pre-determined angular position, for example at 30 to the vertical, with the aid of support means.
  • This support means is constructed from a series of parallel webs 18 each of quadrilateral form disposed between plates 19, 20.
  • the webs 18 can be welded to the plates 19, 20 to form a convenient bracket assembly.
  • the plate 19 is attached to a lower wall 12 inches of the girder l2.
  • the upper edge of the plate 20 is affixed as by welding to a tube 21 and this tube 21 receives the spindle 15.
  • a guide piece 22 is affixed as by welding to the lower region of the plate 20.
  • This guide piece 22 is provided with an inclined bore 23 which freely receives part of a spigot 24 carrying a support shoe 26 at its outer end.
  • the shoe 26 is articulatedly connected to the spigot 24 with the aid of a hinge bolt 25 extending through aligned bores in the shoe 26 and the spigot 24.
  • the bolt 25 has transverselyextending securing pins at its outer end portions which retain the bolt 25 in position.
  • the shoe 26 is basically of U-shaped cross-section with a convex wall portion 27 which serves to engage the fender 16.
  • the spigot 24 has at its innermost end region a transverse bore 29 which receives a shear pin 28.
  • the pin 28 has a head at one end and underlying this head is a groove 33.
  • the outer end portion of the interior of the bush 31 has a corresponding groove and a ring 34 seats in the grooves to locate and retain the pin 28.
  • the pin 28 has weakened zones located at the exterior of the spigot 24 and these zones are produced by peripheral grooves or notches 35 or the like.
  • the stowage material exerts a force P (FIG. 1) upon the fender 16 held in position by the shoe 26 of the support means.
  • This shoe 26 is of relatively great length, i.e., in a direction transverse to the fender l6, and this length is greater than the distance between two adjacent ribs so that deformation of the fender 16 is precluded.
  • the fender 16 When the fender 16 is subjected to loading the forces are transmitted via the support means to the wall 12 inches of the girder 12 while the plate 20, which acts as a tie plate, is subjected to tensile stress. If the force P exerted on the fender l6 exceeds a pre-determined value, typically about eight tons, the shear pin 28 will fracture along the weakened zones 35. The entire fender 16, which remains connected to the girder 12, will now pivot about the spindle as the spigot 24 moves inwardly of the guide piece 22 sliding within the bore 23. The shoe 26 will finally come to rest against the outer face 22 of the guide piece 22 and the fender 16 will again be held firmly in a near vertical disposition so as to still screen off the stowage material.
  • a pre-determined value typically about eight tons
  • the spindle 15 is made sufficiently strong in comparison to the shear pin 28 that the pin 28 fractures before the spindle 15 is damaged.
  • several shear pins 28 with different shear force characteristics can be provided.
  • the shear pins 28 can easily be withdrawn and re-inserted into the guide piece 22 so that the appropriate pin 28 can be selected and readily incorporated into the support means.
  • a mine roof support frame with a plurality of props, a roof girder carried by the props, and a fender connected to the goaf-side end of the roof girder, support means for supporting the fender at a first working position in relation to the roof girder, said support means being mounted on said roof girder in a position to bear against said fender and including a shear pin means through which the force on the fender may be transmitted, said shear pin being adapted to break when the force on the fender exceeds a predetermined value, means for allowing the fender to move from said first position to a predetermined second position in relation to said girder when the shear pin has broken and support means for supporting the fender in said predetermined second position, whereby the fender can continue to function as such while in said predetermined second position.
  • said support means includes a guide piece having a bore and a spigot slidably received in said bore, the shear pin extending through the spigot and the guide piece and generally transversely to the longitudinal'axis of the spigot.
  • a frame according to claim 1, wherein said support means comprises a plurality of parallel webs mounted between two plates, one of said plates being affixed to a lower wall of the roof girder and the other of said plates has a tube attached to one edge, said tube receiving a spindle pivotably supporting the fender.
  • shear pin means is a shear pin provided with weakened zones.
  • a frame according to claim 2 wherein a support shoe is disposed at an end of the spigot, said shoe serving to engage the fender.
  • a frame according to claim 2 wherein the guide piece has a wall surface which serves to define said second position and the outer end of the spigot defines said first position.
  • the support means further includes a plate connected to the roof girder, a further plate supporting said guide piece and means interconnecting said plates.
  • a mine roof support frame with a-plurality of props a roof girder carried by the props, and a fender connected to the goaf-side end of the roof girder
  • support means for supporting the fender at a first working position in relation to the roof girder said support means being mounted on said roof girder in a position to bear against said fender and including a shear pin means through which the force on the fender may be transmitted, said shear pin being adapted to break when the force on the fender exceeds a predetermined value
  • a plurality of parallel webs mounted between two plates, one of said plates being affixed to a lower wall of said roof girder and the other of said plates havspindle pivotably supporting the fender, means for allowing the fender to pivot inwardly from said first position extending at about 30 to the vertical to a second the shear pin has broken.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
US00243943A 1971-04-21 1972-04-14 Mine roof support frames Expired - Lifetime US3800546A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712119246 DE2119246A1 (de) 1971-04-21 1971-04-21 Bruchabweiser, insbesondere für einen schreitenden Ausbau für Untertagebetriebe

Publications (1)

Publication Number Publication Date
US3800546A true US3800546A (en) 1974-04-02

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US00243943A Expired - Lifetime US3800546A (en) 1971-04-21 1972-04-14 Mine roof support frames

Country Status (4)

Country Link
US (1) US3800546A (OSRAM)
BE (1) BE774271A (OSRAM)
DE (1) DE2119246A1 (OSRAM)
FR (1) FR2111138A5 (OSRAM)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889475A (en) * 1973-01-26 1975-06-17 Gullick Dobson Ltd Mine roof supports
US3985328A (en) * 1974-12-21 1976-10-12 Hermann Hemscheidt Maschinenfabrik Prop-and-shoe assemblies of self-advancing mine roof-supports
US4126002A (en) * 1976-02-06 1978-11-21 Dowty Mining Equipment Limited Mine roof support
US4191497A (en) * 1977-07-05 1980-03-04 Gewerkschaft Eisenhutte Westfalia Mine roof supports
US5538364A (en) * 1995-02-14 1996-07-23 Huntsman; Steven D. Yieldable mine post having a double ball and socket configuration
US20130140029A1 (en) * 2011-11-28 2013-06-06 Michael Keith Sullivan Torque limiting device
CN108581258A (zh) * 2018-05-10 2018-09-28 郑州煤矿机械集团股份有限公司 焊接机器人爬坡工件焊接方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3236907A1 (de) * 1982-10-06 1984-04-12 Gewerkschaft Eisenhütte Westfalia, 4670 Lünen Ausbaugestell, insbesondere fuer gewinnungsbetriebe der geneigten lagerung mit schuettversatz
DE3404925A1 (de) * 1984-02-11 1985-08-22 Bergwerksverband Gmbh, 4300 Essen Rueckpfaendkappe fuer schreitausbau

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE481357C (de) * 1925-11-27 1929-08-20 Albert Ilberg Einrichtung zum Einbringen und Stopfen von Bergeversatz
FR1288550A (fr) * 1961-05-05 1962-03-24 Hoesch Bergbautechnik Gmbh Coffrage de remblai avec cadre de soutènement hydraulique, en particulier pour les forts pendages
DE1154061B (de) * 1962-09-14 1963-09-12 Hemscheidt Maschf Hermann Schreitender hydraulischer Ausbaurahmen fuer halbsteile Lagerung bei schwebendem Verhieb
DE1278977B (de) * 1967-05-26 1968-10-03 Rheinstahl Wanheim G M B H Kappen-Einbauhilfe
US3439508A (en) * 1965-04-29 1969-04-22 Dobson Ltd W E & F Mine roof support means
US3576110A (en) * 1969-05-14 1971-04-27 Gewerk Eisenhuette Westfalia Movable support assemblies for mineral mines

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE481357C (de) * 1925-11-27 1929-08-20 Albert Ilberg Einrichtung zum Einbringen und Stopfen von Bergeversatz
FR1288550A (fr) * 1961-05-05 1962-03-24 Hoesch Bergbautechnik Gmbh Coffrage de remblai avec cadre de soutènement hydraulique, en particulier pour les forts pendages
DE1154061B (de) * 1962-09-14 1963-09-12 Hemscheidt Maschf Hermann Schreitender hydraulischer Ausbaurahmen fuer halbsteile Lagerung bei schwebendem Verhieb
US3439508A (en) * 1965-04-29 1969-04-22 Dobson Ltd W E & F Mine roof support means
DE1278977B (de) * 1967-05-26 1968-10-03 Rheinstahl Wanheim G M B H Kappen-Einbauhilfe
US3576110A (en) * 1969-05-14 1971-04-27 Gewerk Eisenhuette Westfalia Movable support assemblies for mineral mines

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3889475A (en) * 1973-01-26 1975-06-17 Gullick Dobson Ltd Mine roof supports
US3985328A (en) * 1974-12-21 1976-10-12 Hermann Hemscheidt Maschinenfabrik Prop-and-shoe assemblies of self-advancing mine roof-supports
US4126002A (en) * 1976-02-06 1978-11-21 Dowty Mining Equipment Limited Mine roof support
US4191497A (en) * 1977-07-05 1980-03-04 Gewerkschaft Eisenhutte Westfalia Mine roof supports
US5538364A (en) * 1995-02-14 1996-07-23 Huntsman; Steven D. Yieldable mine post having a double ball and socket configuration
US20130140029A1 (en) * 2011-11-28 2013-06-06 Michael Keith Sullivan Torque limiting device
US9453374B2 (en) * 2011-11-28 2016-09-27 Weatherford Uk Limited Torque limiting device
US10036211B2 (en) 2011-11-28 2018-07-31 Weatherford Uk Limited Torque limiting device
CN108581258A (zh) * 2018-05-10 2018-09-28 郑州煤矿机械集团股份有限公司 焊接机器人爬坡工件焊接方法
CN108581258B (zh) * 2018-05-10 2020-04-07 郑州煤矿机械集团股份有限公司 焊接机器人爬坡工件焊接方法

Also Published As

Publication number Publication date
FR2111138A5 (OSRAM) 1972-06-02
BE774271A (fr) 1972-02-14
DE2119246A1 (de) 1972-11-02

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