GB871374A - Improvements relating to mine roof supports - Google Patents

Improvements relating to mine roof supports

Info

Publication number
GB871374A
GB871374A GB22039/57A GB2203957A GB871374A GB 871374 A GB871374 A GB 871374A GB 22039/57 A GB22039/57 A GB 22039/57A GB 2203957 A GB2203957 A GB 2203957A GB 871374 A GB871374 A GB 871374A
Authority
GB
United Kingdom
Prior art keywords
roof
mine roof
improvements relating
roof supports
supports
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
GB22039/57A
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB871374A publication Critical patent/GB871374A/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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section

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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Tents Or Canopies (AREA)

Abstract

871,374. Mine roof supports. SCHMID, F. July 11, 1957 [July 12, 1956], No. 22039/57. Class 20(2) A mine roof support comprises telescopic props 10, 11 carrying a bar 12 to which roof f engaging members 13, 14 are connected by ball and socket joints so that they can be turned into a diagonal position when cracks in the roof are in the direction of the arrow 15. The roof engaging members of adjacent supports are intercalated.
GB22039/57A 1956-07-12 1957-07-11 Improvements relating to mine roof supports Expired GB871374A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE871374X 1956-07-12

Publications (1)

Publication Number Publication Date
GB871374A true GB871374A (en) 1961-06-28

Family

ID=6813040

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22039/57A Expired GB871374A (en) 1956-07-12 1957-07-11 Improvements relating to mine roof supports

Country Status (1)

Country Link
GB (1) GB871374A (en)

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