GB658998A - Improvements in mine roof supports - Google Patents

Improvements in mine roof supports

Info

Publication number
GB658998A
GB658998A GB23081/48A GB2308148A GB658998A GB 658998 A GB658998 A GB 658998A GB 23081/48 A GB23081/48 A GB 23081/48A GB 2308148 A GB2308148 A GB 2308148A GB 658998 A GB658998 A GB 658998A
Authority
GB
United Kingdom
Prior art keywords
props
pressure
passage
jack
valve
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
Application number
GB23081/48A
Inventor
Richard Northam Knights
Colin Michael Frye
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.)
Dowty Equipment Ltd
Original Assignee
Dowty Equipment 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 Dowty Equipment Ltd filed Critical Dowty Equipment Ltd
Priority to GB23081/48A priority Critical patent/GB658998A/en
Priority to US113454A priority patent/US2641906A/en
Priority to BE490921A priority patent/BE490921A/en
Priority to FR994590D priority patent/FR994590A/en
Priority to DEP53483A priority patent/DE974199C/en
Publication of GB658998A publication Critical patent/GB658998A/en
Expired legal-status Critical Current

Links

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
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • 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
    • E21D23/0065—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 driven, or automatically, e.g. electrically-hydraulically controlled

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)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Press Drives And Press Lines (AREA)

Abstract

658,998. Hydraulic jacks. DOWTY EQUIPMENT, Ltd. Sept. 1, 1948, Nos. 23081/48 and 14470/49. [Class 78 (iii)] [Also in Groups X and XXIX] A mine roof support comprises two sets of props each consisting of at least two props 11, 11a and 12, 12a. The props in each set are rigidly connected by cross-tubes 15 and the sets are pivotally interconnected by links 17. Roof bars 18, 19 and floor bars 20, 21 are pinjointed to the props. When the props of one set are loosened, they are advanced by means of a hydraulic jack 28. The props may be operated hydraulically. The supply of pressure fluid to the props and to the jack 28 may be controlled by a valve box 30, Fig. 3. With the props in the full line position, pressure-fluid is supplied by a pump 39 from a reservoir 38 into a valve chamber 42. The fluid passes through a valve 43, passage 45 and pipe 37 to the jack 28, and through a non-return valve 51 and pipe 33 to the props 11, 11a. The props 12, 12a are closed to the reservoir so that they also support the desired roof load. As the jack 28 is in its contracted position and the piston cannot move inwards, pressure builds up in the passage 45 causing a piston 54 to move up and open a non- return valve 50, to open the props 12, 12a to the reservoir. The pressure in the chamber 42 also builds up and acts on a plunger 73 which through a spring-operated, dead-centre mechanism 65, 68 moves the valve 43 down to open the passage 45 to the reservoir and supply fluid through passage 44 and pipe 36 to expand the jack, and move the props 12, 12a to the position shown dotted. A similar cycle then takes place, pressure building up in the passage 44 and the chamber 42, to move the props 11, 11a. Relief valves 55, 56 are set to limit a maximum roof load of 50 tons for each pair of props. The pipes to the prop also include non- return valves 58 and relief valves 59 which ensure that the props support a roof load of 1 ton, when loosened. Manually operated valves may be provided for relieving the props. According to the first Provisional Specification the props may be provided with springs which act against the fluid pressure.
GB23081/48A 1948-09-01 1948-09-01 Improvements in mine roof supports Expired GB658998A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB23081/48A GB658998A (en) 1948-09-01 1948-09-01 Improvements in mine roof supports
US113454A US2641906A (en) 1948-09-01 1949-08-31 Mine roof support
BE490921A BE490921A (en) 1948-09-01 1949-08-31 Sky support for mines
FR994590D FR994590A (en) 1948-09-01 1949-09-01 Sky support for mines
DEP53483A DE974199C (en) 1948-09-01 1949-09-01 Longwall extension team

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23081/48A GB658998A (en) 1948-09-01 1948-09-01 Improvements in mine roof supports

Publications (1)

Publication Number Publication Date
GB658998A true GB658998A (en) 1951-10-17

Family

ID=10189812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23081/48A Expired GB658998A (en) 1948-09-01 1948-09-01 Improvements in mine roof supports

Country Status (5)

Country Link
US (1) US2641906A (en)
BE (1) BE490921A (en)
DE (1) DE974199C (en)
FR (1) FR994590A (en)
GB (1) GB658998A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2757515A (en) * 1952-08-04 1956-08-07 Noble Co Tunnel breasting jumbo
US2795936A (en) * 1952-09-30 1957-06-18 Joy Mfg Co Walking roof support
DE974199C (en) * 1948-09-01 1960-10-13 Dowty Equipment Ltd Longwall extension team
DE1169399B (en) * 1956-06-18 1964-05-06 Gewerk Eisenhuette Westfalia Removable expansion for mining operations
US3201943A (en) * 1960-12-24 1965-08-24 Rheinstahl Gmbh Wanheim Mine roof support

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE977365C (en) * 1950-06-18 1966-03-24 Konrad Grebe Wandering longwall mining
US2795934A (en) * 1952-09-30 1957-06-18 Joy Mfg Co Rotating hydraulic roof supporting jacks
US2795935A (en) * 1952-09-30 1957-06-18 Joy Mfg Co Walking roof support
US2756034A (en) * 1952-10-29 1956-07-24 Joy Mfg Co Roof supporting jacks on a continuous miner
BE526791A (en) * 1953-02-25
US2694293A (en) * 1953-05-08 1954-11-16 Hydrauliques Pour L Ind Minier Propping device for roofs of mine levels
DE1078514B (en) * 1954-10-01 1960-03-31 Kloeckner Bergbau Victor Icker Wandering longwall mining, preferably for mining in steep floezen
DE1112030B (en) * 1955-09-17 1961-08-03 Rheinstahl Gmbh Wanheim Vorpfaendvorrichtung for a stamp extension
DE1182614B (en) * 1956-05-17 1964-12-03 Gewerk Eisenhuette Westfalia Back device for a planer guide in steeply mounted Floezen
DE1168372B (en) * 1957-06-28 1964-04-23 Gutehoffnungshuette Sterkrade Mechanized longwall mining
DE1088904B (en) * 1957-08-10 1960-09-15 Gewerk Eisenhuette Westfalia Hydraulic expansion for mining operations
US3143862A (en) * 1958-08-11 1964-08-11 Dobson Ltd W E & F Support of roofs in mines
DE1151235B (en) * 1958-09-10 1963-07-11 Glueckauf Guenther Klerner Mas Distributor for hydraulically actuated, double-acting pre-pressure cylinders for laying face conveyors or the like.
DE1217907B (en) * 1958-12-20 1966-06-02 Bosch Gmbh Robert Use of a switching device with several fittings
US3115754A (en) * 1959-01-23 1963-12-31 Dowty Mining Equipment Ltd Mining shield
DE1130780B (en) * 1960-02-08 1962-06-07 Gewerk Eisenhuette Westfalia Moving hydraulic support frame for underground mining operations
US20060201322A1 (en) * 2005-03-10 2006-09-14 Kroeger E B Support column installation assembly

Family Cites Families (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1473157A (en) * 1923-11-06 morgan
BE457387A (en) *
BE456556A (en) *
US1450329A (en) * 1916-01-05 1923-04-03 Edmund C Morgan Mine-roof-supporting method and apparatus
US1473498A (en) * 1917-10-06 1923-11-06 Morgan Olive Eugenie Tunneling machine
US1710887A (en) * 1921-11-15 1929-04-30 Morgan Olive Eugenie Mining machine
DE510708C (en) * 1929-02-05 1930-10-22 Albert Hamel Extraction chamber with height-adjustable roof
US1870088A (en) * 1931-06-12 1932-08-02 Louis I Beckwith Refrigerating apparatus
DE667538C (en) * 1935-05-23 1938-11-14 Ernst Hoffmann Tunneling machine
GB453560A (en) * 1935-05-27 1936-09-14 Wilhelm Fehlemann Yieldable prop for mines
US2202584A (en) * 1935-06-18 1940-05-28 Sullivan Machinery Co Mining apparatus
US2163959A (en) * 1937-03-18 1939-06-27 John A Edeby Lifting jack
US2152654A (en) * 1937-11-22 1939-04-04 Jr Glenway Maxon Traction mechanism
DE733743C (en) * 1940-02-24 1943-04-01 Bergtechnik G M B H Device for lateral movement of conveyors
DE714182C (en) * 1940-02-24 1941-12-02 Konrad Frielinghaus Hiking pillar
US2420755A (en) * 1942-12-04 1947-05-20 Joy Mfg Co Apparatus for mining
DE919165C (en) * 1943-03-23 1954-10-14 Gerhard Werner Back machine for expansion elements for longwall construction
BE456862A (en) * 1943-06-28 1944-08-31
FR905292A (en) * 1943-07-31 1945-11-29 Pit prop
GB576700A (en) * 1944-04-13 1946-04-16 Ransomes & Rapier Ltd Improvements in or relating to excavating machines
GB658998A (en) * 1948-09-01 1951-10-17 Dowty Equipment Ltd Improvements in mine roof supports

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE974199C (en) * 1948-09-01 1960-10-13 Dowty Equipment Ltd Longwall extension team
US2757515A (en) * 1952-08-04 1956-08-07 Noble Co Tunnel breasting jumbo
US2795936A (en) * 1952-09-30 1957-06-18 Joy Mfg Co Walking roof support
DE1169399B (en) * 1956-06-18 1964-05-06 Gewerk Eisenhuette Westfalia Removable expansion for mining operations
US3201943A (en) * 1960-12-24 1965-08-24 Rheinstahl Gmbh Wanheim Mine roof support

Also Published As

Publication number Publication date
DE974199C (en) 1960-10-13
FR994590A (en) 1951-11-19
BE490921A (en) 1949-09-15
US2641906A (en) 1953-06-16

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