GB805091A - Improvements in, or relating to, mine roof supporting bars - Google Patents

Improvements in, or relating to, mine roof supporting bars

Info

Publication number
GB805091A
GB805091A GB3489054A GB3489054A GB805091A GB 805091 A GB805091 A GB 805091A GB 3489054 A GB3489054 A GB 3489054A GB 3489054 A GB3489054 A GB 3489054A GB 805091 A GB805091 A GB 805091A
Authority
GB
United Kingdom
Prior art keywords
ears
mine roof
bar
relating
supporting bars
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
GB3489054A
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.)
HORACE VICTOR WESTWOOD
Original Assignee
HORACE VICTOR WESTWOOD
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 HORACE VICTOR WESTWOOD filed Critical HORACE VICTOR WESTWOOD
Priority to GB3489054A priority Critical patent/GB805091A/en
Publication of GB805091A publication Critical patent/GB805091A/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)
  • Joining Of Building Structures In Genera (AREA)

Abstract

805,091. Mine roof support bars. WESTWOOD, H. V. Dec. 2, 1955 [Dec. 2, 1954], No. 34890/54. Class 20(2) A mine roof support bar is of channel section widest at the middle whence there is a platform 9 spanning the channel against which a pit prop 10 bears. The side plates 1 of the bar are extended to form ears 3, 4 the ears 3 have a block 8 between them and are adapted to fit between the ears 4 of another bar, the ears being connected by a pin 5 and the bars locked in alignment by a wedge 14 engaging slots in the ears 4 and the inclined ends of the ears 3 and block 8. The bar is reinforced by webs 15, 16, 17.
GB3489054A 1954-12-02 1954-12-02 Improvements in, or relating to, mine roof supporting bars Expired GB805091A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3489054A GB805091A (en) 1954-12-02 1954-12-02 Improvements in, or relating to, mine roof supporting bars

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3489054A GB805091A (en) 1954-12-02 1954-12-02 Improvements in, or relating to, mine roof supporting bars

Publications (1)

Publication Number Publication Date
GB805091A true GB805091A (en) 1958-11-26

Family

ID=10371172

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3489054A Expired GB805091A (en) 1954-12-02 1954-12-02 Improvements in, or relating to, mine roof supporting bars

Country Status (1)

Country Link
GB (1) GB805091A (en)

Similar Documents

Publication Publication Date Title
GB1160513A (en) Improvements relating to Roof Supports for Mine Workings.
GB805091A (en) Improvements in, or relating to, mine roof supporting bars
GB1213019A (en) Improvements in or relating to underground roof support systems
GB865922A (en) Mine roof supports
GB885645A (en) Improvements in or relating to mine roof supports
GB825023A (en) Improvements in or relating to roofing bars for use in mines
GB854978A (en) Improvements in supporting elements for mines
GB814350A (en) Improvements in roof supports for mine workings
GB537485A (en) Improvements in or relating to mine timbering
GB930996A (en) Improvements in mine roof supports
GB909178A (en) Improvements in or relating to mining gallery support structures
GB874435A (en) Advancing mine roof support structure for mine working faces
GB901070A (en) Improved support for mine roadways
GB1451373A (en) Longwall roof support unit of the shield type
GB972381A (en) Improvements in and relating to travelling longwall support means
GB888756A (en) Improvements in and relating to shoring frames having locked joints
GB683142A (en) Improvements in or relating to pit roof supporting girders
GB725958A (en) Improvements in mine roof supports
GB884384A (en) Means for withdrawing roof-support elements in long-wall mine workings
GB776194A (en) Roof support structure for mine workings using props and pivotable girders
GB799889A (en) Improvements in or relating to the staying of arched ribs in the supporting structure of underground roadways and tunnels
GB934062A (en) Improvements in or relating to roof supports for mines
GB1440568A (en) Mine roof supports
GB838190A (en) Improvements in or relating to struts for mine arches
GB892179A (en) Improvements in or relating to hydraulically actuated self advancing roof props