US3169377A - Base for mine props and the like - Google Patents

Base for mine props and the like Download PDF

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Publication number
US3169377A
US3169377A US98923A US9892361A US3169377A US 3169377 A US3169377 A US 3169377A US 98923 A US98923 A US 98923A US 9892361 A US9892361 A US 9892361A US 3169377 A US3169377 A US 3169377A
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US
United States
Prior art keywords
rods
cylinders
rod
skid
pair
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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
US98923A
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English (en)
Inventor
Hoffmann Erich
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
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Gewerkschaft Eisenhutte Westfalia GmbH
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Filing date
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Publication of US3169377A publication Critical patent/US3169377A/en
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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
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices
    • E21D23/0073—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices with advancing shifting devices connected therewith
    • 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
    • E21D23/08—Advancing mechanisms
    • E21D23/081—Advancing mechanisms forming parts of the roof supports

Definitions

  • This invention relates to mining machinery and particularly to roof supporting apparatus in underground Working.
  • a convenient form of roof support consists of a plurality of props mounted as a unit and arranged to be stepped forward alternately. Thus, if there are four such props the arrangement permits two of them to be loosened and stepped forward and raised against the roof, whereupon the other two are moved up into position beside the first two.
  • the pairs of props usually have a common shoe or base so that they move as a unit and the pairs are also interconnected at the roof. They may be connected to provide a substantial bearing area. As coal removal progresses, the roof behind the props may be otherwise supported or permitted to cave.
  • This invention provides a base for supporting the props or columns and includes a pair of skid members which are interconnected and provided with an improved mechanism for stepping the skids forward alternately.
  • the props are adapted to be permanently or at least rigidly mounted on the skids so as to move with them.
  • a further object of the invention is to provide a sturdy base construction simple to manufacture, easily erected and disassembled, and easily adapted to conditions commonly encountered.
  • the base of this invention has a pair of frames A and B similar to each other and arranged side by side, each frame being provided with a pair of prop shoes 1 having sockets or apertures 1 for receiving suitable pit props 2 adapted to extend parallel to each other and vertically with respect to the prop shoes. Suitable clamps 13 are provided to hold the pit props in position.
  • Prop shoes 1 are spaced apart and held so by a skid member 3 which may be flexible enough to allow the prop shoes to rest solidly on the rock floor.
  • Extending laterally from prop shoes 1 are a pair of arms 4- supporting at their ends a rod 5 parallel to skid 3. Skid 3, arms 4 and rod 5 comprise a rectangular structure which preferably has no flexibility horizontally.
  • Frames A and B are connected through a cylinder block 6 which consists of cylinders 7 and 8 as well as a rigid intermediary piece 9.
  • cylinders 7 and 8 are provided a pair of pistons 10 and 11, piston 10 being mounted on rod 5 of frame A and piston 1i being mounted on rod 5 "ice of frame B.
  • Rods 5 are cylindrical and smooth to act as piston rods for pistons 10 and 11.
  • Pistons 1t and 11 are situated near the center point of rods 5 and cylinders '7 and S extend in opposite directions and parallel to each.
  • cylinders 7 and 8 slide on rods 5-5 to permit frames A and B to move parallel and longitudinally with respect to each other, a distance approximately the length of either frame from a starting position in which the frames are side by side. Having been thus moved apart, frames A and B can, of course, he slid back to their original positions.
  • cylinders 7 and 8 are preferably hydraulically actuated.
  • connecting member 9 is provided with an inter-connecting passage 12. leading to the two corresponding ends or heads of cylinders 7 and 8 which are in longitudinal proximity to each other, and a second inter-connecting passage 14 for the other two ends or heads of cylinders 7 and 3 which are longitudinally removed from one another.
  • a suitable fitting 15 is adapted to be connected to a source of hydraulic pressure (not shown) from which is admitted liquid under pressure to cylinder 8 and passage 12 leading to cylinder 7. The reverse actuation is accomplished by admission of such hydraulic liquid at the fitting 16 to cylinder 7, passage 14, and cylinder 8.
  • frames A and B would normally lie fiat on the mine floor supporting the four pit props or jacks to hold up the mine roof.
  • the two lower shoes would be closest to the coal seam and the two prop shoes 1 at the top of the drawing would be away from the seam.
  • the coal removal machinery would move up toward the seam and it would then be desirable to move the pit props closer to the working face.
  • this construction of base is very advantageous.
  • those of frame A When it is desired to set the props forward, those of frame A will be loosened with respect to the roof and pressure applied at the connection 15. This forces skid 3 forward by advancing piston 10 within the cylinder 7 and simultaneously advancing cylinder 8 with respect to piston 16. If only a short advance is desired, it may be stopped at a position above frame A in which the forward prop shoe 1 will assume the position shown dotted at C. The pit props of frame A would then be jacked against the roof in the usual manner and the pit props of frame B will then be loosened from the roof. Pressure fluid then admitted at fitting 16 reverses the action of cylinders 7 and 8 moving skid 3 of frame B forwardly to side-by-side position with frame A. Thus, with the pit props of frame B being again jacked against the roof, the work can then proceed.
  • This construction affords a means of stepping forward the skid 3 to a very advanced position.
  • the distance indicated at D is an advance comparable with the length of rod 5. Such an advance is possible without in any way straining the connection between the two rods 5 and any bending movement in the connection 9 between cylinders 7 and 8 is not substantially increased in spite of the extreme extension between the frames A and B.
  • Advanceable mine prop base arrangement which comprises a pair of fiexible skid members each adapted to support mine prop roof bearing means, a rod for each skid member, an arm at each end of the skid members rigidly supporing the rods in parallel spaced relation to the skid members, a pair of cylinders on said rodsand a pair of double acting pistons operatively disposed in said cylinders on said rods intermediate the ends of said rods, the ends of each rod extending through the ends of each cylinder, means connecting said cylinders together in staggered endwise fixed relation to each otherto maintain said rods parallel to each other and to permit said cylinders to move said rods longitudinally an additive. longitudinal distance substantially equal .to the length of one rod from a starting position where'both rods are side by side.
  • Base for mine props and the like comprising a pair of substantially parallel skid members each adapted to support a plurality of mine props and the like, a rod for each skid member supported thereby in substantially parallel spaced relation to the skid member, said rods being positioned betweensaid skids, and motive means including one longitudinallyextending first means displaceably mounted on one said rod, another longitudinally extending first means displaceably mounted on the other said rod,'one coacting second meansfixedly mounted on said one rod and connected with said one corresponding first means for relative longitudinal movement there with, and another coacting second means fixedly mounted on the other said rod and connected with the other corresponding first means for relative longitudinal movement therewith, both said first means being operatively interconnected with each other in fixed longitudinal relation and with their longitudinal axes substantially parallel to each other to maintain said rods in parall'elism'and to i move said rods longitudinally with respect to each other by coaction between the corresponding first and second means of the motive means.
  • Base for mine props and the like comprising a pair of vertically flexible skid members each adapted to support a pair of mine props in spaced relation with respect to each other, a rod for each said skid member supported thereby in spaced relation to the skid member, said rods being positioned between said skid members, motive means including a pair of cylinders displaceably mounted on said rods for relative movement therewith and a pair of pistons fixedly mounted on said rods in said cylinders, and connecting means operatively interconnecting said cylinder s with each other in substantially parallel staggered endwise fixed relation to maintain said rods in parallelism and to move said rods longitudinally with respect to each other by coaction of said cylinders with said pistons.
  • each cylinder extends longitudinally over the corresponding rod a distance substantially equal to about one-half of the length of such rod and each piston is positioned at about the longitudinal center of the corresponding rod, whereby the rods and in turn the skids thereof may be moved with respect to each other a longitudinal distance substantially equal to the length of one rod from a starting position where both rods are side by side.
  • skid members are provided with arms for supporting said rods to form a pair of similar rectangular frames rotatable with respect to each other on said cylinders via said rods for folding said skid members one upon the other to form a compact bundle.

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)
  • Current-Collector Devices For Electrically Propelled Vehicles (AREA)
  • Transmission Devices (AREA)
  • Actuator (AREA)
  • Load-Engaging Elements For Cranes (AREA)
US98923A 1960-04-27 1961-03-28 Base for mine props and the like Expired - Lifetime US3169377A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG29546A DE1146829B (de) 1960-04-27 1960-04-27 Wanderndes hydraulisches Ausbaugestell

Publications (1)

Publication Number Publication Date
US3169377A true US3169377A (en) 1965-02-16

Family

ID=7123769

Family Applications (2)

Application Number Title Priority Date Filing Date
US98923A Expired - Lifetime US3169377A (en) 1960-04-27 1961-03-28 Base for mine props and the like
US393662A Expired - Lifetime US3225547A (en) 1960-04-27 1964-09-01 Travelling hydraulic development frame for mining operations

Family Applications After (1)

Application Number Title Priority Date Filing Date
US393662A Expired - Lifetime US3225547A (en) 1960-04-27 1964-09-01 Travelling hydraulic development frame for mining operations

Country Status (4)

Country Link
US (2) US3169377A (fr)
BE (1) BE603102A (fr)
DE (1) DE1146829B (fr)
GB (1) GB956012A (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320751A (en) * 1962-01-29 1967-05-23 Groetschel Karl Maria Support
US3438209A (en) * 1965-05-27 1969-04-15 Konrad Grebe Roof support assembly of the type used on the longwall face of a coal seam
US3590586A (en) * 1968-09-05 1971-07-06 Gullick Ltd Mine roof supports
US3628335A (en) * 1968-10-12 1971-12-21 Gewerk Eisenhuette Westfalia Support assemblies for mineral mines
US20070256555A1 (en) * 2006-05-04 2007-11-08 Bjorn Koop Telescopic lifting assembly

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1205035B (de) * 1964-07-25 1965-11-18 Hoesch Bergbautechnik G M B H Schreitender Ausbaubock
US3352117A (en) * 1964-11-12 1967-11-14 Dobson Ltd W E & F Driving gear anchor means for mines
US3435620A (en) * 1965-09-20 1969-04-01 Gewerk Eisenhuette Westfalia Walking mine roof support
DE2909165C2 (de) * 1979-03-08 1986-11-27 Gewerkschaft Eisenhütte Westfalia GmbH, 4670 Lünen Vorrichtung zum Anschluß eines hydraulischen Schreitausbaus an das Versorgungssystem eines untertägigen Gewinnungsbetriebes
US4256343A (en) * 1979-05-16 1981-03-17 Fairchild Incorporated Mechanism for advancing continuous mining machine through mining cycle and tramming modes

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039972B (de) * 1951-01-24 1958-10-02 Gerhard Werner Ausbauelement fuer Strebausbau
FR1192850A (fr) * 1957-04-26 1959-10-28 Hoesch Werke Ag Dispositif de suspension des cadres hydrauliques de soutènement évitant les distorsions
DE1078068B (de) * 1955-03-04 1960-03-24 Hoesch Westfalenhuette Ag Hydraulischer Ausbaurahmen
FR1245142A (fr) * 1959-01-16 1960-11-04 Gullick Ltd Dispositifs à vérin hydraulique particulièrement applicables aux soutènements detoit de mine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT197311B (fr) * 1956-01-27 1958-04-25 Gewerkschaft Eisenhuette Westfalia

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1039972B (de) * 1951-01-24 1958-10-02 Gerhard Werner Ausbauelement fuer Strebausbau
DE1078068B (de) * 1955-03-04 1960-03-24 Hoesch Westfalenhuette Ag Hydraulischer Ausbaurahmen
FR1192850A (fr) * 1957-04-26 1959-10-28 Hoesch Werke Ag Dispositif de suspension des cadres hydrauliques de soutènement évitant les distorsions
FR1245142A (fr) * 1959-01-16 1960-11-04 Gullick Ltd Dispositifs à vérin hydraulique particulièrement applicables aux soutènements detoit de mine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3320751A (en) * 1962-01-29 1967-05-23 Groetschel Karl Maria Support
US3438209A (en) * 1965-05-27 1969-04-15 Konrad Grebe Roof support assembly of the type used on the longwall face of a coal seam
US3590586A (en) * 1968-09-05 1971-07-06 Gullick Ltd Mine roof supports
US3628335A (en) * 1968-10-12 1971-12-21 Gewerk Eisenhuette Westfalia Support assemblies for mineral mines
US20070256555A1 (en) * 2006-05-04 2007-11-08 Bjorn Koop Telescopic lifting assembly
US7770868B2 (en) * 2006-05-04 2010-08-10 Hoerbiger Automatisierungstechnik Holding Gmbh Telescopic lifting assembly

Also Published As

Publication number Publication date
BE603102A (fr) 1961-10-27
DE1146829B (de) 1963-04-11
US3225547A (en) 1965-12-28
GB956012A (en) 1964-04-22

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