GB971632A - Improvements in or relating to bars of box section - Google Patents

Improvements in or relating to bars of box section

Info

Publication number
GB971632A
GB971632A GB1815462A GB1815462A GB971632A GB 971632 A GB971632 A GB 971632A GB 1815462 A GB1815462 A GB 1815462A GB 1815462 A GB1815462 A GB 1815462A GB 971632 A GB971632 A GB 971632A
Authority
GB
United Kingdom
Prior art keywords
bars
relating
box section
jan
roof support
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
GB1815462A
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 GB971632A publication Critical patent/GB971632A/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
    • E21D17/01—Caps for supporting mine roofs characterised by the shape of the cap, e.g. of specified cross-section
    • 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)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
  • Body Structure For Vehicles (AREA)

Abstract

971,632. Mine roof support bars. K. M. GROETSCHEL. Jan. 16, 1961 [Jan. 14, 1960], No. 18154/62. Divided out of 971,631. Heading EIE. In a mine roof support bar of box-section as disclosed in Specification 971,631 the horizontal walls, b<SP>1</SP>, b<SP>11</SP> are thickened locally adjacent to the laterally spaced webs a<SP>1</SP>, a<SP>11</SP> and are of reduced thickness in their central regions.
GB1815462A 1960-01-14 1961-01-16 Improvements in or relating to bars of box section Expired GB971632A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DEG28803A DE1122024B (en) 1960-01-14 1960-01-14 Box profile cap

Publications (1)

Publication Number Publication Date
GB971632A true GB971632A (en) 1964-09-30

Family

ID=7123580

Family Applications (2)

Application Number Title Priority Date Filing Date
GB169061A Expired GB971631A (en) 1960-01-14 1961-01-16 Improvements in or relating to bars of box section
GB1815462A Expired GB971632A (en) 1960-01-14 1961-01-16 Improvements in or relating to bars of box section

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB169061A Expired GB971631A (en) 1960-01-14 1961-01-16 Improvements in or relating to bars of box section

Country Status (3)

Country Link
BE (1) BE599032A (en)
DE (1) DE1122024B (en)
GB (2) GB971631A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114386A (en) * 1976-05-28 1978-09-19 Ruhrkohle, A.G. Method and device for removing resilient gallery lining frames in mining and tunnelling which consist of a number of section segments inserted one into another in a dissimilar manner

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8305873U1 (en) * 1983-03-02 1983-10-13 Heiliger, Martha-Catharina, 5166 Kreuzau STEEL JOINT CAP FOR UNDERGROUND REMOVAL

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4114386A (en) * 1976-05-28 1978-09-19 Ruhrkohle, A.G. Method and device for removing resilient gallery lining frames in mining and tunnelling which consist of a number of section segments inserted one into another in a dissimilar manner

Also Published As

Publication number Publication date
BE599032A (en) 1961-07-12
DE1122024B (en) 1962-01-18
GB971631A (en) 1964-09-30

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