GB660738A - Improvements in or relating to pit supports - Google Patents

Improvements in or relating to pit supports

Info

Publication number
GB660738A
GB660738A GB20018/49A GB2001849A GB660738A GB 660738 A GB660738 A GB 660738A GB 20018/49 A GB20018/49 A GB 20018/49A GB 2001849 A GB2001849 A GB 2001849A GB 660738 A GB660738 A GB 660738A
Authority
GB
United Kingdom
Prior art keywords
girders
relating
pit
july
wedge
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
GB20018/49A
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.)
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 GB660738A publication Critical patent/GB660738A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/16—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/22—Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with member, pin, cross- piece, or the like, ruptured, sheared through, or permanently deformed upon excessive pressure
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/28—Telescopic props with parts held relatively to each other by friction or gripping
    • E21D15/43—Details of wedges
    • 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)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Joining Of Building Structures In Genera (AREA)
GB20018/49A 1948-07-30 1949-07-29 Improvements in or relating to pit supports Expired GB660738A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1010120T 1948-07-30

Publications (1)

Publication Number Publication Date
GB660738A true GB660738A (en) 1951-11-14

Family

ID=9568768

Family Applications (1)

Application Number Title Priority Date Filing Date
GB20018/49A Expired GB660738A (en) 1948-07-30 1949-07-29 Improvements in or relating to pit supports

Country Status (4)

Country Link
BE (1) BE485602A (enrdf_load_html_response)
FR (1) FR1010120A (enrdf_load_html_response)
GB (1) GB660738A (enrdf_load_html_response)
NL (1) NL70049C (enrdf_load_html_response)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780067A (en) * 1951-05-15 1957-02-05 Gutehoffnungshuette Oberhausen Roof supporting means or cap and a method of positioning the same
US3762172A (en) * 1970-09-11 1973-10-02 Gewerk Eisenhuette Westfalia Mine roof support bar assemblies

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2780067A (en) * 1951-05-15 1957-02-05 Gutehoffnungshuette Oberhausen Roof supporting means or cap and a method of positioning the same
US3762172A (en) * 1970-09-11 1973-10-02 Gewerk Eisenhuette Westfalia Mine roof support bar assemblies

Also Published As

Publication number Publication date
NL70049C (enrdf_load_html_response)
FR1010120A (fr) 1952-06-09
BE485602A (enrdf_load_html_response)

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