GB799739A - Improvements in or relating to roof-bars for use in long wall mining - Google Patents

Improvements in or relating to roof-bars for use in long wall mining

Info

Publication number
GB799739A
GB799739A GB23733/55A GB2373355A GB799739A GB 799739 A GB799739 A GB 799739A GB 23733/55 A GB23733/55 A GB 23733/55A GB 2373355 A GB2373355 A GB 2373355A GB 799739 A GB799739 A GB 799739A
Authority
GB
United Kingdom
Prior art keywords
pin
bars
slot
tongue
roof
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
GB23733/55A
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.)
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
Original Assignee
EBERHARD VON CAMPENHAUSEN
WILLY EGGEMANN
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 EBERHARD VON CAMPENHAUSEN, WILLY EGGEMANN filed Critical EBERHARD VON CAMPENHAUSEN
Publication of GB799739A publication Critical patent/GB799739A/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)
  • Heat Sensitive Colour Forming Recording (AREA)
GB23733/55A 1954-08-19 1955-08-17 Improvements in or relating to roof-bars for use in long wall mining Expired GB799739A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE799739X 1954-08-19

Publications (1)

Publication Number Publication Date
GB799739A true GB799739A (en) 1958-08-13

Family

ID=6711673

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23733/55A Expired GB799739A (en) 1954-08-19 1955-08-17 Improvements in or relating to roof-bars for use in long wall mining

Country Status (4)

Country Link
BE (1) BE540613A (enrdf_load_stackoverflow)
FR (1) FR1135845A (enrdf_load_stackoverflow)
GB (1) GB799739A (enrdf_load_stackoverflow)
NL (1) NL111909C (enrdf_load_stackoverflow)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE499766A (enrdf_load_stackoverflow) * 1948-07-08
DE1218382B (de) * 1958-03-18 1966-06-08 Hermann Schwarz Kommanditgesel Zugfeste Verbindung fuer gelenkig verbundene Kappen im Strebausbau
US3043108A (en) * 1958-07-16 1962-07-10 Vanwersch Aloys Mine roof bar arrangement

Also Published As

Publication number Publication date
NL111909C (enrdf_load_stackoverflow)
FR1135845A (fr) 1957-05-03
BE540613A (enrdf_load_stackoverflow)

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