GB786538A - Improvements in and relating to caps for supporting mine roofs - Google Patents

Improvements in and relating to caps for supporting mine roofs

Info

Publication number
GB786538A
GB786538A GB22572/55A GB2257255A GB786538A GB 786538 A GB786538 A GB 786538A GB 22572/55 A GB22572/55 A GB 22572/55A GB 2257255 A GB2257255 A GB 2257255A GB 786538 A GB786538 A GB 786538A
Authority
GB
United Kingdom
Prior art keywords
flanges
caps
relating
cap
engage
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
GB22572/55A
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.)
Gutehoffnungshutte Sterkrade AG
Original Assignee
Gutehoffnungshutte Sterkrade AG
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 Gutehoffnungshutte Sterkrade AG filed Critical Gutehoffnungshutte Sterkrade AG
Publication of GB786538A publication Critical patent/GB786538A/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
    • E21D17/01—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)
  • Devices Affording Protection Of Roads Or Walls For Sound Insulation (AREA)

Abstract

786,538. Mine roof supports. GUTEHOFFNUNGSHUTTE STERKRADE AKT.- GES. Aug. 5, 1955 [Sept. 14. 1954], No. 22572/55. Class 20(2) A cap for supporting mine roofs is of box section and comprises two juxtaposed I-sections of high heat-treated steel the top and bottom flanges 1, 2 of which are welded together along edges 3 and have outside surfaces inclined inwardly towards the edges 3. The flanges of each I-section are inclined and oppositely arranged so that the top and bottom surfaces of the cap are concave and only engage a pit prop directly below the flanges 4. The outside flanges have parts 6 to engage lugs on the pit props.
GB22572/55A 1954-09-14 1955-08-05 Improvements in and relating to caps for supporting mine roofs Expired GB786538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE786538X 1954-09-14

Publications (1)

Publication Number Publication Date
GB786538A true GB786538A (en) 1957-11-20

Family

ID=6699042

Family Applications (1)

Application Number Title Priority Date Filing Date
GB22572/55A Expired GB786538A (en) 1954-09-14 1955-08-05 Improvements in and relating to caps for supporting mine roofs

Country Status (1)

Country Link
GB (1) GB786538A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001680A1 (en) * 1986-08-28 1988-03-10 Armo Gesellschaft Für Bauelemente, Bau- Und Wohnbe Section for the shoring of mines and tunnels
EP0331618A2 (en) * 1988-03-02 1989-09-06 Preussag Stahl Aktiengesellschaft Method for manufacturing a steel section, and its use and section

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1988001680A1 (en) * 1986-08-28 1988-03-10 Armo Gesellschaft Für Bauelemente, Bau- Und Wohnbe Section for the shoring of mines and tunnels
US4881853A (en) * 1986-08-28 1989-11-21 Benning Guenter Support section for mines and tunnels
EP0331618A2 (en) * 1988-03-02 1989-09-06 Preussag Stahl Aktiengesellschaft Method for manufacturing a steel section, and its use and section
EP0331618A3 (en) * 1988-03-02 1991-01-02 Preussag Stahl Aktiengesellschaft Method for manufacturing a steel section, and its use and section

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