US3848420A - Mine roof supports - Google Patents

Mine roof supports Download PDF

Info

Publication number
US3848420A
US3848420A US00342304A US34230473A US3848420A US 3848420 A US3848420 A US 3848420A US 00342304 A US00342304 A US 00342304A US 34230473 A US34230473 A US 34230473A US 3848420 A US3848420 A US 3848420A
Authority
US
United States
Prior art keywords
support
roof
shield
walkway
base structure
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
US00342304A
Other languages
English (en)
Inventor
A Dawson
F Small
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson 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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Application granted granted Critical
Publication of US3848420A publication Critical patent/US3848420A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

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
    • E21D23/0004—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
    • E21D23/0017—Pile type supports
    • E21D23/003—Pile type supports consisting of a rigid pile
    • 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
    • E21D23/03—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor having protective means, e.g. shields, for preventing or impeding entry of loose material into the working space or support

Definitions

  • ABSTRACT 61/45 D Primary Examiner-Dennis L. Taylor Attorney, Agent, or Firm-Berman, Bishoff & Platt [5 7] ABSTRACT
  • the invention is for a mine roof support including a base, hydraulic prop means mounted on said base, a roof engaging member mounted on said prop means and a side shield for preventing mined mineral flushing into the support.
  • each such side shield comprises a plate extending up from the base of the support and a plate hanging down from the roof engaging member, the two plates overlapping so as to maintain continuity of the side shield at all times but without interferring with extension and retraction of the props.
  • the support includes means providing a walkway for miners, under the roof engaging member of the support, forward of the side shield or shields.
  • the support may also include a rear shield for preventing mined mineral flushing into the support through the rear thereof.
  • the side shield or shields and said rear shield may constitute an integral w structure or structures.
  • the invention is particularly, but not exclusively, concerned with roof supports for use in a shortwall system of mining in which a mining machine removes a substantial web of mineral from the mineral face as it travels or moves therealong.
  • the thickness of the web may, for example, be of the order of feet.
  • This thickness of the web of mineral removed, each time the machine travels along the face, means that the roof sup ports have to be advanced with respect to one another, by a substantial distance, e.g. in stepped distances of the order of 5 feet as the removal of the mineral by the machine proceeds.
  • An object of the present invention is to overcome this problem.
  • a mine roof support including a base, hydraulic prop means mounted on said base, a roof-engaging member mounted on said prop means, a side shield for the support comprising a side shield member extending up from said base, and a side shield member extending down from said roof engaging member, said side shield members overlapping to maintain continuity of the side shield during extension of the props to put the support in a roof supporting condition, and means providing a walkway for miners under the roof engaging member of the support forward of said side shield.
  • a mine roof support comprising a floor engaging member, a roof engaging member, at least one front and one rear extensible prop therebetween, an advancing means for the support adapted to be attached to an anchorage, an extensible rear shield and a shield at at least one side of the support, the length of said side shield being not less than the maximum travel of the advancing means, the arrangement being such that a walkway is provided between said anchorage and said front prop.
  • the rear shield and/or the side shield is or are extensible between the floor engaging member and the roof engaging member and extend from the top to the bottom of the support or thereabouts.
  • the base projects forwardly to provide said walkway.
  • a part of the advancing means may project forwardly of the support to provide said walkway.
  • the side shield projects up to or beyond the foremost prop or props.
  • the side shield may comprise two side walls one at each side of the support.
  • the rear shield and the side shield or shields are of telescopic form.
  • the rear shield and the side shield or shields may constitute an integral structure or structures.
  • the roof engaging member may comprise a canopy, a cantilever roof engaging bar pivotally connected to said canopy and an extension bar slidable in or on said cantilever bar, the permissible extension of said extension bar being not greater than the maximum stroke of the advancing means.
  • the pivotal connection of the cantilever extension bar to the canopy is positioned above the walkway.
  • a pressure fluid ram may I act on the cantilever roof engaging bar to apply it to the roof.
  • the anchorage may be a rail, conveyor or the like, which extends along the face, and to which a hydraulic ram, incorporated in the support, may be anchored for the advance of the support in the well known way.
  • a double-acting ram incorporated in each support first advances a section of the rail which is then held by neighbouring supports so that it serves as an anchorage for the advance of said support by the retraction of the ram.
  • the support may be advanced in two stages of, say, 5 feet.
  • the rail may also serve as a guide means or track for the mineral mining machine.
  • FIG. 1 is a side elevation of one of the several roof supports used in the arrangement
  • FIG. 2 is a plan view of the support shown in FIG. 1, and
  • FIG. 3 is a diagram illustrating the roof support arrangement.
  • the reference numeral 10 indicates the mineral face from which a web of material is removed by the mining machine 11.
  • a plurality of self-advancing roof supports 12 are arranged along the face in side-by-side relationship and are advanced behind the machine 11 as it moves along the face.
  • Each'of the roof supports (see FIGS. 1 and 2) comprises a base 13 having mounted on it a pair of front hydraulically extensible props 14 and a pair of rear hydraulically extensible props 15. These props support on their upper parts a canopy 16.
  • a cantilever roofengaging member 17 is pivotally connected to the canopy at 18.
  • the cantilever roof engaging member 17 has slidably supported in it an extension bar 19 for supporting the forward area of the roof adjacent the face.
  • the support is provided with antiflushing shields 20, 21 and 22 which extend from top to bottom of the support, the shield 22 being of I-section and being in three parts, spaced along the width of the canopy 16, to absorb the initial and greater impact encountered in caving than is experienced by the side plates 23.
  • the support is also provided with anti-flushing side shields which extend substantially from the top to bottom of the support.
  • These side shields comprising upper and lower plates 23 and 24 which overlap, the upper plate 23 being hingedly suspended from the canopy 16.
  • the side shields prevent mineral flushing into the sides of a support when it is advanced relatively to one of its neighbouring supports as shown in FIG. 3.
  • a double-acting support advancing ram (not shown) is housed in the box-section beam 25 which is incorporated in the base 13 of the support. At its forward end said ram is provided with means 26, which is guided in beam 25, for connecting it to a section of rail 27 which extends along the mineral face, the sections of rail of the several roof supports being hinged or pivoted together on a vertical axis.
  • This rail serves as an anchorage for advancing each support, in the well known way, and also as a guide or path defining means for the mineral mining machine 11.
  • the rail 27 may be snaked or advanced towards the mineral face in sections, by extending the advancing rams of the supports. The rams are then ready to be retracted so as subsequently to draw the supports up to the rail. It will be appreciated that when one support is being advanced it is temporarily released from between floor and roof and the rail 27 will be held firmly by its neighbouring supports. To provide roof support close up to the face the roof extension bars 19 of the supports are advanced as shown at the left hand side of FIG. 3.
  • Conveyor means is, of course, provided for carrying away the mineral as it is removed from the face by the mining machine.
  • a pressure fluid ram 28 may be provided for applying the bar 17 to the roof.
  • a mine roof support comprising a base structure
  • hydraulic prop means including foremost and rearmost props mounted on said base structure, said base structure being extended forwardly of all said prop means to provide a walkway for miners, a roof-engaging canopy mounted on said prop means for application thereby to a roof to be supported, a cantilever roof-engaging member pivotally attached to and projecting forwardly from said canopy and over said walkway, a lower sideshield plate extending up from and secured to the base structure along the side thereof and closing the space between said foremost and rearmost props for a part of the height thereof, an upper side-shield plate hingedly attached to said canopy along the side thereof and depending therefrom and overlapping said lower side shield plate for substantially the full length thereof so as to close the remaining space between said foremost and rearmost props, an extensible shield closing the support at the rear of all said prop means, whereby the flushing of mineral into the support at the sides and rear thereof is prevented, and a pressure-fluid ram means acting between said canopy and said cantilever roof-engaging member to apply the latter to a roof to be supported
  • a mine roof support as claimed in claim 1 wherein included in the base structure of the support there is a self-advancing means for the support and a part of said self-advancing means projects forwardly of all said prop means so as to provide said walkway.

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)
  • Excavating Of Shafts Or Tunnels (AREA)
US00342304A 1972-03-24 1973-03-16 Mine roof supports Expired - Lifetime US3848420A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1397272A GB1387311A (en) 1972-03-24 1972-03-24 Mine roof supports

Publications (1)

Publication Number Publication Date
US3848420A true US3848420A (en) 1974-11-19

Family

ID=10032710

Family Applications (1)

Application Number Title Priority Date Filing Date
US00342304A Expired - Lifetime US3848420A (en) 1972-03-24 1973-03-16 Mine roof supports

Country Status (4)

Country Link
US (1) US3848420A (en, 2012)
AU (1) AU466853B2 (en, 2012)
GB (1) GB1387311A (en, 2012)
PL (1) PL84776B1 (en, 2012)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4094153A (en) * 1976-10-15 1978-06-13 Bochumer Eisenhutte Heintzmann Gmbh & Co. Breast roof support system for longwall mining
US4102140A (en) * 1975-07-19 1978-07-25 Gullick Dobson Limited Self-advancing mine roof supports
US4189257A (en) * 1977-07-07 1980-02-19 Taiheiyo Engineering Inc. Sheltering apparatus for use in long wall mining
US4747729A (en) * 1986-01-22 1988-05-31 Voest-Alpine Aktiengesellschaft Movable trestle
US5019651A (en) * 1990-06-20 1991-05-28 Merck & Co., Inc. Process for preparing 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid (ABP) or salts thereof
EP0795680A1 (en) * 1996-03-11 1997-09-17 Council of Scientific and Industrial Research Shortwall mining equipment for extraction of pillars in underground coal mines
US20110006586A1 (en) * 2009-07-10 2011-01-13 Joy Mm Delaware Longwall mining roof supports
CN102536288A (zh) * 2012-01-10 2012-07-04 中煤北京煤矿机械有限责任公司 绿色环保高水充填支架

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483705A (en) * 1966-04-29 1969-12-16 Gullick Ltd Mine roof supports
US3488966A (en) * 1967-07-28 1970-01-13 Gullick Ltd Mine roof supports
US3548601A (en) * 1967-04-21 1970-12-22 Dobson Ltd W E & F Mine roof supports
US3570255A (en) * 1968-06-10 1971-03-16 Mastabar Mining Equipment Co L Mine roof support
US3618325A (en) * 1969-01-23 1971-11-09 Kloeckner Werke Ag Hydraulic support systems for mine workings
US3686874A (en) * 1970-06-03 1972-08-29 Kloeckner Werke Ag Cap pull for a mining frame prop of an advancing pit support

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3483705A (en) * 1966-04-29 1969-12-16 Gullick Ltd Mine roof supports
US3548601A (en) * 1967-04-21 1970-12-22 Dobson Ltd W E & F Mine roof supports
US3488966A (en) * 1967-07-28 1970-01-13 Gullick Ltd Mine roof supports
US3570255A (en) * 1968-06-10 1971-03-16 Mastabar Mining Equipment Co L Mine roof support
US3618325A (en) * 1969-01-23 1971-11-09 Kloeckner Werke Ag Hydraulic support systems for mine workings
US3686874A (en) * 1970-06-03 1972-08-29 Kloeckner Werke Ag Cap pull for a mining frame prop of an advancing pit support

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102140A (en) * 1975-07-19 1978-07-25 Gullick Dobson Limited Self-advancing mine roof supports
US4094153A (en) * 1976-10-15 1978-06-13 Bochumer Eisenhutte Heintzmann Gmbh & Co. Breast roof support system for longwall mining
US4189257A (en) * 1977-07-07 1980-02-19 Taiheiyo Engineering Inc. Sheltering apparatus for use in long wall mining
US4747729A (en) * 1986-01-22 1988-05-31 Voest-Alpine Aktiengesellschaft Movable trestle
US5019651A (en) * 1990-06-20 1991-05-28 Merck & Co., Inc. Process for preparing 4-amino-1-hydroxybutylidene-1,1-bisphosphonic acid (ABP) or salts thereof
EP0795680A1 (en) * 1996-03-11 1997-09-17 Council of Scientific and Industrial Research Shortwall mining equipment for extraction of pillars in underground coal mines
US5769504A (en) * 1996-03-11 1998-06-23 Council Of Scientific & Industrial Research Equipment for shortwall mining useful for extraction of pillars in underground coal mines
US20110006586A1 (en) * 2009-07-10 2011-01-13 Joy Mm Delaware Longwall mining roof supports
US8590982B2 (en) 2009-07-10 2013-11-26 Joy Mm Delaware, Inc. Longwall mining roof supports
US9670777B2 (en) 2009-07-10 2017-06-06 Joy Mm Delaware, Inc. Longwall mining roof supports
CN102536288A (zh) * 2012-01-10 2012-07-04 中煤北京煤矿机械有限责任公司 绿色环保高水充填支架

Also Published As

Publication number Publication date
PL84776B1 (en, 2012) 1976-04-30
AU466853B2 (en) 1975-11-13
GB1387311A (en) 1975-03-12
AU5345773A (en) 1974-09-19

Similar Documents

Publication Publication Date Title
CN105909295B (zh) 无巷道无煤柱自留巷开采工法的快速回撤支架及装备系统
US4065929A (en) Mine roof support and method in longwall mining of thick mineral seams
CN108374684A (zh) 综采工作面端头异型支护设备
US3889475A (en) Mine roof supports
US3848420A (en) Mine roof supports
US3874734A (en) Advanceable support assembly with inclination control for longwall guide
US4055959A (en) Apparatus for use in mining or tunnelling installations
CN105715289B (zh) 沿空留巷端头支架
US4029361A (en) Longwall mining roof support for double deck machines
CN105736027A (zh) 沿空留巷支架组
US4192632A (en) Support systems for mineral mining installations
US3483705A (en) Mine roof supports
US3856356A (en) Method of mining mineral
US3504944A (en) Devices for tensioning a conveyor in a mineral mining installation
US4094153A (en) Breast roof support system for longwall mining
US3333426A (en) Self-advancing hydraulically extensible mine roof supports
US3621661A (en) Mine roof supports
US3812681A (en) Mine roof supports
US4041714A (en) Mine roof supports
US3471201A (en) Mineral mining arrangement including track for a mining machine
US3375668A (en) Mine roof supports
US4002036A (en) Mine roof supports
CN205558951U (zh) 一种沿空留巷端头支架
US4183700A (en) Walking mine support
US3851480A (en) Mine roof support assemblies