GB748081A - Connecting means for mine roof-supporting bars - Google Patents

Connecting means for mine roof-supporting bars

Info

Publication number
GB748081A
GB748081A GB28577/52A GB2857752A GB748081A GB 748081 A GB748081 A GB 748081A GB 28577/52 A GB28577/52 A GB 28577/52A GB 2857752 A GB2857752 A GB 2857752A GB 748081 A GB748081 A GB 748081A
Authority
GB
United Kingdom
Prior art keywords
bars
bar
wedge
mine roof
abutments
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
GB28577/52A
Other languages
English (en)
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 GB748081A publication Critical patent/GB748081A/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)
  • Emergency Lowering Means (AREA)
GB28577/52A 1951-11-12 1952-11-12 Connecting means for mine roof-supporting bars Expired GB748081A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE748081X 1951-11-12

Publications (1)

Publication Number Publication Date
GB748081A true GB748081A (en) 1956-04-18

Family

ID=6648781

Family Applications (1)

Application Number Title Priority Date Filing Date
GB28577/52A Expired GB748081A (en) 1951-11-12 1952-11-12 Connecting means for mine roof-supporting bars

Country Status (3)

Country Link
BE (1) BE515437A (is)
FR (1) FR1066401A (is)
GB (1) GB748081A (is)

Also Published As

Publication number Publication date
FR1066401A (fr) 1954-06-04
BE515437A (is)

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