US3393522A - Face support - Google Patents

Face support Download PDF

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Publication number
US3393522A
US3393522A US524528A US52452866A US3393522A US 3393522 A US3393522 A US 3393522A US 524528 A US524528 A US 524528A US 52452866 A US52452866 A US 52452866A US 3393522 A US3393522 A US 3393522A
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United States
Prior art keywords
frame
guide
parallel
supporting frames
face
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Expired - Lifetime
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US524528A
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English (en)
Inventor
Freerk J Fontein
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Stamicarbon BV
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Stamicarbon BV
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Publication date
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Publication of US3393522A publication Critical patent/US3393522A/en
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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
    • E21D23/0409—Aligning or guiding means for the supports or for the constitutive parts of the supports
    • 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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith

Definitions

  • the present invention relates to a face support device for coal mines and the like consisting of two supporting frames which can be alternately advanced parallel to each other by means of an advancing device and a parallel guide composed of guide rails and guide members cooperating with these rails and more particularly to improved means for maintaining such Supporting frames in proper perpendicular relation to the seam as they are advanced even when side-to-side inclinations in the seam are encountered.
  • Face support devices of the present type are well known.
  • One problem presented by prior art devices of this type occurs when a side to side inclination is encountered in the seam.
  • the moment which has to be exerted on a frame placed in an inclined face gallery to prevent it from leaning sidewards when it is released is absorbed by the parallel guide.
  • this guide is subjected to large transverse forces Iwhich considerably increase the resistance that has to Ibe overcome to advance a released frame.
  • the released lframe will not be exactly parallel to the clamped frame, but sightly lean towards the delivery or lower end of the face gallery. After this frame has Ibeen reset, it will retain this position.
  • An object of the present invention is to provide a face support device of the type described having improved means for alleviating the above problem.
  • the guide rails and the guide members cooperating therewith are constructed so that the guide members can turn with respect to the center line of the guide rails, and coupling means is provided between the pair of :supporting frames which permits the usual advancing movements but which is made so rigid that a released frame is kept upright and parallel to the engaged frame irrespective of the seam inclination.
  • the parallel guide may consist of rods of circular cross section and sleeves cooperating therewith so that the sleeves can turn with respect to the rods.
  • each supporting frame is provided with a guide rod, and the rods of these frames are connected by a runner fitted with guide sleeves.
  • the moment to be exerted on a released frame to prevent it from leaning over too much in an inclined face gallery is produced not by the parallel guide, but by an improved coupling means, so that no extra transverse forces encum'fbering the advance of the released frame can act on the parallel guide.
  • These forces now act on the pivot pins of the coupling means.
  • the work calculated as the product of force and the distance covered by this force, is considerably less in the case of a hinge than in the case of a straight guide.
  • the forces acting on the hinges can be kept small by using hinges with a great height and, consequently, a large moment arm.
  • the coupling means preferably comprises strips of spring steel the ends of which are bent at right angles and are pivotally interconnected by hinges. This makes it possible to use hinges with a large height.
  • the parts of the coupling means may be given the shape of a frame by interconnecting the bent ends of the strips. If the coupling members are deflected, the props will move parallel to themselves.
  • the guide rods may tbe so eonstructedthat the guide members enclose these rods with ample play. If the frames are moreover advanced by means of a pulling member extending from a point of the face conveyor to the leading sides of the frames, an aligning effect is produced on the frames when these are advanced. That is, a support remains in line with a given point of the conveyor as the coal face advances and will not shift towards the lower end of an inclined face gallery or assume an oblique position with respect to the conveyor.
  • a released frame When a face support of the known type has shifted towards the delivery end of the force gallery, a released frame will 'be forced by the guide connected to the clamped frame to move parallel to this clamped frame so that it twill retain its wrong position.
  • the released frame can move freely with respect to the clamped frame due to the ample play, and, as the frame is pulled forward from a fixed point of the conveyor, it will automatically follow the course of this point.
  • FIGURE l is a perspective -view of a face support ⁇ device embodying the principles of the present invention.
  • FIGURE 2 is a side elevational view of the support device
  • FIGURE 3 is a sectional view taken along the line 3-3 of FIGURE 2, with certain parts broken away;
  • FIGURE 4 is a sectional view taken along the line 4-4 of FIGURE 3.
  • a face support device including two supporting frames, 1 and 1', of generally conventional construction.
  • the frames 1 and 1 comprise two hydraulic props 2 and 3 and 2' and 3', respectively, which support roof plates 4 and 5 and 4' and 5', respectively, and are supported on the iloor of the seam by means of base plates 6 and 6', respectively.
  • guide means are provided, preferably in the form of -a rod or rail 7 of circular section connected to the base plate 6 of frame 1 and a similar rod 7' connected to the frame 1.
  • the rods 7 and 7', and consequently the frames 1 and 1', are spaced by a runner or guide member 8, which is provided with ⁇ sleeves 9 and 9', respectively, which can slide along the rods with ample play.
  • ⁇ Coupling means is provided in accordance with the present invention in conjunction with the guide means.
  • the props 3 and 3' are provided with brackets 10 and 10' to which straps 11 and 11' are connected by means of pivot pins 12 and 12' running parallel to the props.
  • springs 13 and 13' Fitted to these stra-ps are springs 13 and 13' fixed to straps 14 and 14', which are interconnected by a pivot shaft 15 running parallel to the props.
  • the springs have a box-shaped longitudinal section with a relatively great height.
  • the hinges or pivot pins 12, 12' and 15 are fitted to the upright sides of the springs so that the height of these hinges is great and the forces produced in the hinges to keep a released frame upright are consequently comparatively small.
  • a hydraulic cylinder 16 is mounted in the base plate 6 of frame 1.
  • the end of the piston rod 17 extending outside the cylinder is fitted wit-h a roller 18 on which a pulling element, such as a chain or rope 19, runs.
  • the pulling element is fixed at one end to the leading side of base plate 6, as at 20, and, after passing over roller 18, runs through a guide 21 on the leading side of the base plate 6 and then around a pair of rollers 23 and 24 mounted on the face conveyor 22.
  • the opposite end of the pulling element 19 is attached to the lea-ding side of base plate 6', as at 25. Since the cylinder pulls at two portions 19 and 19' of the chain, the stroke of the cylinder need be equal only to half the step length of a frame.
  • pivoting parts 13 and 13' are attached to the trailing sides of the hindmost props 3, 3' of the support and t-he common pivot is so mounted that it is in front of the line of connection between the hinges 12, 12' of the props, the passage through the Iface gallery will hardly be obstructed by the upright coupling members 13, 13.
  • a face support device for a coal mine or the like comprising: a pair of parallel supporting frames each including base means for engaging the door of the rnine; yroof plate means for engaging the roof of the mine; and extensible and retractable prop means between said base means and said roof plate means; guide means between said supporting frames interconnecting the latter for generally parallel longitudinal movement with respect to each other between two limiting positions and for pivotal movement about axes parallel to the direction of said relative longitudinal movement, said guide means comprising a longitudinally extending guide rail carried by each of said supporting ⁇ frames and a guide member slidably receiving each of said guide rails; means for effecting an advancing longitudinal movement of either one of said supporting frames with respect to the other when the prop means of said one supporting frame is retracted and the prop means of said other supporting frame is extended; and coupling means connected between said supporting .frames permitting said relative longitudinal and pivotal movements for maintaining the one ⁇ frame in parallel relation with respect to the other frame during such advancing movements; said coupling means comprising a pair of coup
  • a face support device as defined in claim 1 wherein said supporting frame advancing means comprises an elongated flexible pulling element having two opposite ends, each operatively connected to respective of said supporting frames and adapted to be trained, intermediate said two opposite ends, about roller guide elements carried 'by a face conveyor at 4fixed positions thereon in longitudinal alignment with the respective operative connections with said supporting frames.
  • a face support device for a coal mine or the like comprising: a pair of parallel supporting frames each including base means for engaging the floor of the mine; roof plate means for engaging the roof of the mine; and extensible and retractable prop means lbetween said base means and said roof plate means; guide means between said supporting frame interconnecting the latter for generally parallel longitudinal movement with respect to each other between two limiting positions and for pivotal movement about axes parallel to the ⁇ direction of said relative longitudinal movement, means for effecting an advancing longitudinal movement of either one of said supporting frames with respect to the other when the prop means of said one supporting frame is retracted and the prop means of said other supporting frame is extended; and coupling means connected between said supporting frames .permitting said relative llongitudinal and pivotal movements -for maintaining the one frame in parallel relation with respect to the other frame during such advancing movements; said supporting frame advancing means comprising a flexible pulling element having its ends -iixed respectively to the base means of said supporting frames and adapted to be trained about roller guide elements carried by a face
  • a face support device for a coal mine or the like comprising: a -pair of parallel ⁇ supporting frames each including base means for engaging the oor of the mine; roof plate means for engaging the roof of the mine; and extensible ,and retractable prop means between said base means and said roof plate means; guide means between said supporting frames linterconnecting the latter for general-1y parallel longitudinal movement with respect to each other between two limiting positions and for pivotal movement about axes parallel to the direction of said relative longitudinal movement; means for effecting an advancing longitudinal movement of either one of said supporting frames with respect to the other when the prop means of said one supporting frame is retracted and the prop means of said other supporting frame is extended; and coupling means connected between said supporting frames permitting said relative longitudinal and pivotal movements for maintaining the one frame in parallel relation with respect to the other frame during such advancing movements; said prop means of each of said supporting frames including a hydraulic prop having an upright axis, and wherein said coupling means comprises a pair of coupling members having adjacent ends pivotally interconnected and opposite ends pivotally connected
  • each of said coupling members comprises spring means having hinge means secured to opposite ends thereof.
  • each coupling member comprises spaced upper and lower strips of spring steel having their opposite ends bent and fixedly interconnected by a rigid hinge element.
  • a face support device as defined in claim S wherein the axis of the pivotal interconnection between said coupling members is disposed in advance of .a plane passing through the axes of the pivotal connections of said coupling members with said respective props.

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  • 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)
  • Transmission Devices (AREA)
  • Framework For Endless Conveyors (AREA)
US524528A 1965-02-03 1966-02-02 Face support Expired - Lifetime US3393522A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL6501331A NL6501331A (en, 2012) 1965-02-03 1965-02-03

Publications (1)

Publication Number Publication Date
US3393522A true US3393522A (en) 1968-07-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
US524528A Expired - Lifetime US3393522A (en) 1965-02-03 1966-02-02 Face support

Country Status (4)

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US (1) US3393522A (en, 2012)
BE (1) BE675885A (en, 2012)
GB (1) GB1134862A (en, 2012)
NL (1) NL6501331A (en, 2012)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293248A (en) * 1978-02-23 1981-10-06 Centralny Osrodek Projektowo-Konstrukcyjny Maszyn Gorniczych "Komag" Walking roof support

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106050284A (zh) * 2016-07-15 2016-10-26 山东兖煤黑豹矿业装备有限公司 平行作业式快速掘进支护系统及构建方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097829A (en) * 1959-01-16 1963-07-16 Gullick Ltd Roof support in mines
FR1346972A (fr) * 1962-03-19 1963-12-27 Gewerk Eisenhuette Westfalia Châssis de soutènement mobile à avancement automatique, utilisable notamment dans les mines
DE1170354B (de) * 1960-07-13 1964-05-21 Rheinstahl Gmbh Wanheim Fuehrungsvorrichtung fuer maschinell rueckbare Ausbaurahmen
US3197965A (en) * 1961-01-10 1965-08-03 Electro Hydraulies Ltd Self-advancing mine roof supports

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3097829A (en) * 1959-01-16 1963-07-16 Gullick Ltd Roof support in mines
DE1170354B (de) * 1960-07-13 1964-05-21 Rheinstahl Gmbh Wanheim Fuehrungsvorrichtung fuer maschinell rueckbare Ausbaurahmen
US3197965A (en) * 1961-01-10 1965-08-03 Electro Hydraulies Ltd Self-advancing mine roof supports
FR1346972A (fr) * 1962-03-19 1963-12-27 Gewerk Eisenhuette Westfalia Châssis de soutènement mobile à avancement automatique, utilisable notamment dans les mines

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4293248A (en) * 1978-02-23 1981-10-06 Centralny Osrodek Projektowo-Konstrukcyjny Maszyn Gorniczych "Komag" Walking roof support

Also Published As

Publication number Publication date
GB1134862A (en) 1968-11-27
BE675885A (en, 2012) 1966-08-01
NL6501331A (en, 2012) 1966-08-04

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