GB756069A - Improvements in or relating to coal face shoring structures - Google Patents

Improvements in or relating to coal face shoring structures

Info

Publication number
GB756069A
GB756069A GB3408953A GB3408953A GB756069A GB 756069 A GB756069 A GB 756069A GB 3408953 A GB3408953 A GB 3408953A GB 3408953 A GB3408953 A GB 3408953A GB 756069 A GB756069 A GB 756069A
Authority
GB
United Kingdom
Prior art keywords
wedge
girders
relating
coal face
bolt
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
GB3408953A
Inventor
August Fischer
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.)
Becorit Grubenausbau GmbH
Original Assignee
Becorit Grubenausbau GmbH
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
Priority to DEP55763A priority Critical patent/DE895884C/en
Application filed by Becorit Grubenausbau GmbH filed Critical Becorit Grubenausbau GmbH
Priority to GB3408953A priority patent/GB756069A/en
Publication of GB756069A publication Critical patent/GB756069A/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
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type

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)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

756,069. Mine roof supports. BECORITGRUBENAUSBAU GES. Dec. 8, 1953, No. 34089/53. Class 20(2). Mine roof supporting girders are connected by a unit 3 comprising a pivot bolt 5 formed in one unit with a wedge 6 which is driven between the ends of two girders to hold one of them against the roof while props are placed beneath it. The bolt and wedge may be releasably connected. The girders engage by a tongue 10 and a fork 9 and the wedge is driven in an aperture 7a in the tongue 10 and engages the end of the fork. In Fig. 4 the wedge 6 engages downwardly extending parts of the girders beneath the bolt 5.
GB3408953A 1949-09-24 1953-12-08 Improvements in or relating to coal face shoring structures Expired GB756069A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DEP55763A DE895884C (en) 1949-09-24 1949-09-24 Longwall mining
GB3408953A GB756069A (en) 1953-12-08 1953-12-08 Improvements in or relating to coal face shoring structures

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3408953A GB756069A (en) 1953-12-08 1953-12-08 Improvements in or relating to coal face shoring structures

Publications (1)

Publication Number Publication Date
GB756069A true GB756069A (en) 1956-08-29

Family

ID=10361237

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3408953A Expired GB756069A (en) 1949-09-24 1953-12-08 Improvements in or relating to coal face shoring structures

Country Status (1)

Country Link
GB (1) GB756069A (en)

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