US3753595A - Longwall mining machine overhanging face side of conveyor - Google Patents

Longwall mining machine overhanging face side of conveyor Download PDF

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Publication number
US3753595A
US3753595A US00235155A US3753595DA US3753595A US 3753595 A US3753595 A US 3753595A US 00235155 A US00235155 A US 00235155A US 3753595D A US3753595D A US 3753595DA US 3753595 A US3753595 A US 3753595A
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US
United States
Prior art keywords
conveyor
machine
skid
combination recited
housing
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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
US00235155A
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English (en)
Inventor
W Lanfermann
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.)
Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
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Gebr Eickhoff Maschinenfabrik u Eisengiesserei GmbH
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Publication of US3753595A publication Critical patent/US3753595A/en
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Expired - Lifetime legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/02—Machines which completely free the mineral from the seam solely by slitting

Definitions

  • ABSTRACT A coal cutting machine extends across a conveyor that is spaced from the working face of a coal mine, and across most of the space between it and the working face.
  • One side of the machine is supported on the side wall of the conveyor along its gobbing side.
  • the opposite side of the machine is supported by a skid on the foot wall of the mine.
  • the machine houses a winch and drive motor, and a cutter head housing is connected to an end of the machine body in the same area and contains a horizontal axle that projects from the conveyor side of the housing. Mounted on this axle is the inner end of an arm that extends lengthwise of the machine away from the cutter housing.
  • the outer end of the arm carries a roll cutter that extends laterally from it across the housing.
  • Coal mining machines provided with rotating cutter rolls and used in longwall mining are moved forward along the wall on a chain, ends of which are anchored. Such a machine usually slides along the two side walls of the frame of a face conveyor which rests on the foot wall close to the longwall. The coal that is loosened by the machine is carried to the end of the longwall by the conveyor and then carried away by another conveyor.
  • the conveyor is moved onto the freshly cut foot wall beneath the new working face and the roof supports are likewise moved in that direction.
  • the weight is distributed by it over a great area of the foot wall.
  • the machine is stable as it moves forward slowly. This would not be true if the conveyor is near the gobbing side of the machine in respect of the path of the machine so that the machine projects from the working face said of the conveyor and overhangs that side.
  • machines that can be moved on the frame of a conveyor and in which the machine body is borne by a slide-like gantry that extends above the conveyor can only be worked into seams with a given minimum thickness.
  • This thickness is established prin cipally by the height of the machine body, including the gantry, to which the height of the conveyor itself is added.
  • Another object of the invention is to provide the machine with a cutter head housing, from the gobbing side of which projects the usual axle that supports the arm carrying the cutter roll.
  • a further object is to partially support the machine on the freshly cut part of the foot wall between the conveyor and the new working face to the extent that the foot wall is capable of receiving the great weight of the machine.
  • Related objects are to provide for adjusting the extent of the weight displacement of the machine on the foot wall with the ability to assure the correct positioning of the roll cutters relative to the working face at all times.
  • FIG. 1 is a plan view
  • FIG. 2 is an enlarged cross section taken on the line ll-Il of FIG. 1;
  • FIG. 3 is an enlarged end view in cross section taken on the line IIIlIl of FIG. 1;
  • FIG. 4 is a longitudinal section taken on the line IVIV of FIG. 2.
  • a coal cutting machine is shown that is moved along a working face 1 of a mine in a longwall mining system. It also moves along a face conveyor 2 that rests on the foot wall of the mine and is spaced from the working face. At its gobbing side the conveyor has an upwardly extending side wall 3 provided at its top with a horizontal surface and with a guide rail 4 that is circular in cross section.
  • the cutting machine has a low body that extends from wall 3 of the conveyor across the conveyor and also across most of the space between it and the working face.
  • This body includes two housings 6 and 7 connected end to end, one for a winch 8 and the other for a drive motor 9. These housings are in the space between the conveyor and the working face and therefore constitute an overhanging portion of the machine body.
  • gantry 11 Connected to these housings is a gantry 11 that bridges the space between them and the guide rail 4 of the conveyor.
  • the outer side of the gantry portion of the machine body is supported by the conveyor's gobbing-side wall. This is done by skids 12 that slide on the side wall and encircle the guide rail.
  • the central portion of the machine body is supported by a downwardly extending skid 13 that slides along a plate 14 resting on the foot wall near the working face side of the conveyor.
  • This plate extends lengthwise of the conveyor frame and is connected to it by a ramp 15. The weight of the machine on this plate prevents any tendency of the adjacent side of the conveyor to rise due to the weight of the machine on the opposite side of the conveyor frame. Plate 14 also distributes weight of the machine over a large area of the foot wall.
  • skid 17 At the side of the machine nearest the working face there is another skid that engages and loads the foot wall directly.
  • This skid 17 is designed to take some of the weight off the middle skid 13, depending upon the bearing capacity of the foot wall.
  • the skid is provided with a vertical recess 18, in which a lower toggle link 19 is mounted on a transverse pin 20.
  • the upper end of the link is forked and straddles the lower end of an upper toggle link 21.
  • the two links are pivotally connected by a pin 22.
  • the upper link is also pivoted on a pin 23 that is mounted in a frame 24 secured to the adjoining sides of the winch and motor housings.
  • the upper end of the upper link is pivotally connected to a piston rod 26 that extends lengthwise of the machine into a fluid pressure cylinder 27.
  • the closed end of the cylinder is pivotally mounted on a pin 28 that is likewise mounted in frame 24.
  • the fluid pressure is adjusted by the operator by means of a pressure reducing valve.
  • the fluid pressure line for the cylinder can be connected into the hydraulic circuit (not shown) that operates the winch.
  • parallel bars 30 project from the opposite ends of the skid and have transverse pins 31 welded to their bottoms. Each pin extends through a slot in the lower end of an inclined guide bar 32 between the parallel bars.
  • the outer upper ends of the guide bars are mounted on pivot pins 33 secured to the bottom of a pair of cutter head housings 34.
  • Each of these housings is connected by a vertical plate 36 to the adjoining ends of housing 6 or 7.
  • the cutter head housings are offset laterally relative to housings 6 and 7 so that they extend toward the working face farther than the body of the machine, with frame 24 between their laterally projecting portions.
  • Each cutter head housing contains the usual transverse horizontal axle 37 that projects from the conveyor side of the housing for supporting the inner end of an arm 38 that can be swung up and down.
  • the arms are therefore disposed between the cutter head housings and the conveyor, with the conveyor side of the arms aligned with the correspondingsides of housings 6 and 7, to reduce the width of the machine.
  • the arms contain the usual trains of gears for driving roll cutters 39 journalled in their outer ends and extending laterally therefrom across the outer ends of the cutter head housings. There is therefore a roll cutter at each end of the machine with the four housings in the space between them as shown in FIG. 1.
  • This machine can be tilted transversely around a longitudinal axis to keep the axes of the roll cutters horizontal even though the foot wall may be inclined toward or away from the working face.
  • double-acting fluid pressure cylinders 41 are secured to the opposite ends of the gantry above guide rail 4.
  • the pistons 42 of these cylinders extend down into recesses in skids 12 as shown in FIG. 3 and are held in place by pins 43 that have tapered ends projecting into openings in the skids. This connection allows universal movement of the ends of the pistons in the skids as the cylinders are moved up or down on the pistons to tilt the machine relative to the conveyor.
  • a chain 45 extends along the gobbing side of the conveyor and has its ends anchored in any suitable manner.
  • This chain extends over a pair of guide sprockets 46 that are spaced a shortdistance apart in the gantry near guide rails 4', as shown in F 1G. 1.
  • a drive sprocket 47 Between these two sprockets there is a drive sprocket 47, around the lower portion of which the chain is directed by the guide sprockets.
  • the drive sprocket is mounted on the outer end of a drive shaft 48 rotatable in bearings 49 in a heavy bar 50 that is welded in the gantry and extends lengthwise of it.
  • the guide sprockets rotate around rigid axles 51 also supported by this bar and the outer side wall of the gantry.
  • the inner end of the drive shaft is provided with a bore with internal teeth that engage external teeth on the end of the drive shaft 52 of winch 8, whereby the drive sprocket is driven by the winch to move the machine along the chain.
  • the height of the machine is reduced so that it can operate in coal seams of less thickness than heretofore. Yet, the machine is so designed that it remains stable as it moves along the stable face conveyor, in spite of one side of the machine overhanging the conveyor a considerable distance.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Rollers For Roller Conveyors For Transfer (AREA)
US00235155A 1971-03-19 1972-03-16 Longwall mining machine overhanging face side of conveyor Expired - Lifetime US3753595A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2113399A DE2113399C3 (de) 1971-03-19 1971-03-19 Walzenschrämmaschine

Publications (1)

Publication Number Publication Date
US3753595A true US3753595A (en) 1973-08-21

Family

ID=5802124

Family Applications (1)

Application Number Title Priority Date Filing Date
US00235155A Expired - Lifetime US3753595A (en) 1971-03-19 1972-03-16 Longwall mining machine overhanging face side of conveyor

Country Status (5)

Country Link
US (1) US3753595A (enrdf_load_stackoverflow)
JP (1) JPS5118322Y2 (enrdf_load_stackoverflow)
DE (1) DE2113399C3 (enrdf_load_stackoverflow)
FR (1) FR2130158B1 (enrdf_load_stackoverflow)
GB (1) GB1363022A (enrdf_load_stackoverflow)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088370A (en) * 1974-10-04 1978-05-09 Coal Industry (Patents) Limited Haulage arrangements for mineral mining machines
US4166652A (en) * 1977-07-16 1979-09-04 Gebr. Eickhoff Maschinenfabrik Und Eisengiesserei M.B.H. Mining machine, particularly for the working of low mine seams
US4266828A (en) * 1978-06-22 1981-05-12 Taiheiyo Engineering Inc. Apparatus on drum shearer for cutting through safety wall in long wall mining
US4372619A (en) * 1979-09-22 1983-02-08 Halbach & Braun Chain having longitudinal stiffness used with hauling and cutting equipment
US4435018A (en) 1980-08-13 1984-03-06 Dresser Europe S.A. Mineral winning machine for "in web" mining system
US20110163590A1 (en) * 2008-09-17 2011-07-07 Rag Aktiengesellschaft Longwall Equipment Having Vertically Adjustable Disc Shearer Loader Guided on the Face Conveyor

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2250460C3 (de) * 1972-10-14 1981-09-10 Ibm Deutschland Gmbh, 7000 Stuttgart Magnetischer Aufzeichnungsträger
JPS5166810A (ja) * 1974-11-21 1976-06-09 Suwa Seikosha Kk Jikikirokutai
GB1521006A (en) * 1975-11-20 1978-08-09 G P Konstrukt I Experim I Ugol Mining machines
JPS5336205A (en) * 1976-09-16 1978-04-04 Hitachi Ltd Manufacture of magnetic disk of high recording density
JPS5350805A (en) * 1976-10-20 1978-05-09 Hitachi Ltd Production of high recording density magnetic disc
ES8104489A1 (es) * 1980-01-24 1980-12-16 Empresa Nac Hulleras Norte Maquina rozadora para explotaciones mineras
DE3042475A1 (de) * 1980-11-11 1982-06-16 Gebr. Eickhoff, Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Walzenschraemmaschine, insbesondere fuer den abbau niedriger floeze
JPS5862823A (ja) * 1981-10-08 1983-04-14 Nec Corp 垂直磁気記憶体
DE3247939C2 (de) * 1982-12-24 1986-08-21 Gebr. Eickhoff Maschinenfabrik U. Eisengiesserei Mbh, 4630 Bochum Zusatzwalze für eine niedrig bauende Walzenschrämmaschine

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1026053A (en) * 1962-02-13 1966-04-14 Coal Industry Patents Ltd Mineral mining machines
FR1444906A (fr) * 1965-05-26 1966-07-08 Lorraine Houilleres Machine d'abattage total à tambours
GB1061665A (en) * 1965-08-11 1967-03-15 G Pk I Exi Ugolnogo Mash Cutter-loader for coal getting
DE1272254B (de) * 1967-02-15 1968-07-11 Eickhoff Geb Verfahren und Vorrichtung zum Floezabbau im Bereich der Antriebs- bzw. Umkehrstation eines Strebfoerdermittels mit Hilfe einer Schraemmaschine
US3602549A (en) * 1969-02-19 1971-08-31 Eickhoff Geb Coal-mining machine

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1026053A (en) * 1962-02-13 1966-04-14 Coal Industry Patents Ltd Mineral mining machines
FR1444906A (fr) * 1965-05-26 1966-07-08 Lorraine Houilleres Machine d'abattage total à tambours
GB1061665A (en) * 1965-08-11 1967-03-15 G Pk I Exi Ugolnogo Mash Cutter-loader for coal getting
DE1272254B (de) * 1967-02-15 1968-07-11 Eickhoff Geb Verfahren und Vorrichtung zum Floezabbau im Bereich der Antriebs- bzw. Umkehrstation eines Strebfoerdermittels mit Hilfe einer Schraemmaschine
US3602549A (en) * 1969-02-19 1971-08-31 Eickhoff Geb Coal-mining machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4088370A (en) * 1974-10-04 1978-05-09 Coal Industry (Patents) Limited Haulage arrangements for mineral mining machines
US4166652A (en) * 1977-07-16 1979-09-04 Gebr. Eickhoff Maschinenfabrik Und Eisengiesserei M.B.H. Mining machine, particularly for the working of low mine seams
US4266828A (en) * 1978-06-22 1981-05-12 Taiheiyo Engineering Inc. Apparatus on drum shearer for cutting through safety wall in long wall mining
US4372619A (en) * 1979-09-22 1983-02-08 Halbach & Braun Chain having longitudinal stiffness used with hauling and cutting equipment
US4435018A (en) 1980-08-13 1984-03-06 Dresser Europe S.A. Mineral winning machine for "in web" mining system
US20110163590A1 (en) * 2008-09-17 2011-07-07 Rag Aktiengesellschaft Longwall Equipment Having Vertically Adjustable Disc Shearer Loader Guided on the Face Conveyor

Also Published As

Publication number Publication date
JPS5118322Y2 (enrdf_load_stackoverflow) 1976-05-17
DE2113399B2 (de) 1973-03-15
FR2130158B1 (enrdf_load_stackoverflow) 1975-04-25
JPS4720803U (enrdf_load_stackoverflow) 1972-11-09
DE2113399A1 (de) 1972-09-28
DE2113399C3 (de) 1973-10-04
GB1363022A (en) 1974-08-14
FR2130158A1 (enrdf_load_stackoverflow) 1972-11-03

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