GB949380A - Improvements in or relating to mine roof supports - Google Patents

Improvements in or relating to mine roof supports

Info

Publication number
GB949380A
GB949380A GB1642260A GB1642260A GB949380A GB 949380 A GB949380 A GB 949380A GB 1642260 A GB1642260 A GB 1642260A GB 1642260 A GB1642260 A GB 1642260A GB 949380 A GB949380 A GB 949380A
Authority
GB
United Kingdom
Prior art keywords
mine roof
prop
relating
roof supports
disposed
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
GB1642260A
Inventor
John Cooke
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 Ltd
Original Assignee
Gullick 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 Ltd filed Critical Gullick Ltd
Priority to GB1642260A priority Critical patent/GB949380A/en
Publication of GB949380A publication Critical patent/GB949380A/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
    • E21D23/0069—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 without essential advancing shifting devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/0206—Hydraulically operated extension devices

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)
  • Fluid-Pressure Circuits (AREA)

Abstract

949,380. Advancing mine roof supports. GULLICK Ltd. April 24, 1961 [May 10, 1960], No. 16422/60. Heading E1E. An advancing mine roof support frame 1, 3, 4, 5 having a double-acting jack 2 is provided with a pivoted cantilever 6 adapted to be urged against the mine roof by an auxiliary piston 8 disposed within the upper prop port 7 of the prop 3. The prop 3 is controlled by a valve 10 and the pressure therein also raises the piston 8, a relief valve (not shown) being disposed in the circuit. For details of a slightly modified framework, Fig. 3 (not shown), should be referred to.
GB1642260A 1960-05-10 1960-05-10 Improvements in or relating to mine roof supports Expired GB949380A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1642260A GB949380A (en) 1960-05-10 1960-05-10 Improvements in or relating to mine roof supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1642260A GB949380A (en) 1960-05-10 1960-05-10 Improvements in or relating to mine roof supports

Publications (1)

Publication Number Publication Date
GB949380A true GB949380A (en) 1964-02-12

Family

ID=10077034

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1642260A Expired GB949380A (en) 1960-05-10 1960-05-10 Improvements in or relating to mine roof supports

Country Status (1)

Country Link
GB (1) GB949380A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123885A (en) * 1982-07-09 1984-02-08 Dowty Mining Equipment Ltd Roof support for use in mines
CN102337909A (en) * 2010-07-16 2012-02-01 李泽宇 Socket

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2123885A (en) * 1982-07-09 1984-02-08 Dowty Mining Equipment Ltd Roof support for use in mines
US4492495A (en) * 1982-07-09 1985-01-08 Dowty Mining Equipment Limited Roof support for use in mines
CN102337909A (en) * 2010-07-16 2012-02-01 李泽宇 Socket

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