GB379975A - Improved supporting-bar for supporting the roof at the working faces in mines - Google Patents

Improved supporting-bar for supporting the roof at the working faces in mines

Info

Publication number
GB379975A
GB379975A GB3448/32A GB344832A GB379975A GB 379975 A GB379975 A GB 379975A GB 3448/32 A GB3448/32 A GB 3448/32A GB 344832 A GB344832 A GB 344832A GB 379975 A GB379975 A GB 379975A
Authority
GB
United Kingdom
Prior art keywords
supporting
roof
mines
bar
working faces
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
GB3448/32A
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 GB379975A publication Critical patent/GB379975A/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

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)
  • Excavating Of Shafts Or Tunnels (AREA)

Abstract

379,975. Mine roof supports. SCHNEIDER, M., 64, Hafenstrasse, Ruhrort, Duisburg, Germany. Feb. 5, 1932, No. 3448. Convention date, March 14, 1931. [Class 20 (ii).] During excavation work in mines, the roof is supported adjacent to the working position by means of spring steel bars 1 which are driven into the working face 4 and supported at their projecting ends on supports 2. The bars 1 are of a shape to fit approximately the bore-holes and are formed of portions 5, 6 with curved faces 1 separated by a narrow web 7.
GB3448/32A 1931-03-14 1932-02-05 Improved supporting-bar for supporting the roof at the working faces in mines Expired GB379975A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE379975X 1931-03-14

Publications (1)

Publication Number Publication Date
GB379975A true GB379975A (en) 1932-09-08

Family

ID=6344786

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3448/32A Expired GB379975A (en) 1931-03-14 1932-02-05 Improved supporting-bar for supporting the roof at the working faces in mines

Country Status (1)

Country Link
GB (1) GB379975A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677535A (en) * 1950-02-17 1954-05-04 Paul V Malloy Mine roof support beam with wall drilling end

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2677535A (en) * 1950-02-17 1954-05-04 Paul V Malloy Mine roof support beam with wall drilling end

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