GB1235873A - Improved advancing mine roof support - Google Patents

Improved advancing mine roof support

Info

Publication number
GB1235873A
GB1235873A GB2689368A GB2689368A GB1235873A GB 1235873 A GB1235873 A GB 1235873A GB 2689368 A GB2689368 A GB 2689368A GB 2689368 A GB2689368 A GB 2689368A GB 1235873 A GB1235873 A GB 1235873A
Authority
GB
United Kingdom
Prior art keywords
mine roof
canopy
advancing mine
roof support
advancing
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
GB2689368A
Inventor
Peter Shuttleworth
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.)
Mastabar Mining Equipment Co Ltd
Original Assignee
Mastabar Mining Equipment Co 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 Mastabar Mining Equipment Co Ltd filed Critical Mastabar Mining Equipment Co Ltd
Priority to GB2689368A priority Critical patent/GB1235873A/en
Publication of GB1235873A publication Critical patent/GB1235873A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21D17/04—Cantilever extension or similar protecting devices for use in longwall working
    • 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

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)
  • Ship Loading And Unloading (AREA)

Abstract

1,235,873. Advancing mine roof supports. MASTABAR MINING EQUIPMENT CO. Ltd. 6 June, 1968, No. 26893/68. Addition to 1,148,953. Heading E1P. In an advancing mine roof support as claimed in claims 1 and 2 of Specification 1,148,953, the canopy extends forwardly beyond the front end of the support by an amount at least equal to that required to cover the advancing ram in its fully extended position. The increased forward length may be obtained simply by using a canopy of suitable length. The canopy extension may, however, comprise a cantilevered arm formed of a load spreader plate 86 secured to and bridging the forward ends of two parallel leaf springs 84.
GB2689368A 1968-06-06 1968-06-06 Improved advancing mine roof support Expired GB1235873A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2689368A GB1235873A (en) 1968-06-06 1968-06-06 Improved advancing mine roof support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2689368A GB1235873A (en) 1968-06-06 1968-06-06 Improved advancing mine roof support

Publications (1)

Publication Number Publication Date
GB1235873A true GB1235873A (en) 1971-06-16

Family

ID=10250863

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2689368A Expired GB1235873A (en) 1968-06-06 1968-06-06 Improved advancing mine roof support

Country Status (1)

Country Link
GB (1) GB1235873A (en)

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