GB848534A - Mine roof bars - Google Patents

Mine roof bars

Info

Publication number
GB848534A
GB848534A GB2462858A GB2462858A GB848534A GB 848534 A GB848534 A GB 848534A GB 2462858 A GB2462858 A GB 2462858A GB 2462858 A GB2462858 A GB 2462858A GB 848534 A GB848534 A GB 848534A
Authority
GB
United Kingdom
Prior art keywords
pin
pins
rings
mine roof
bar
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
GB2462858A
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
Priority to DEV11478A priority Critical patent/DE1078070B/de
Priority to US748843A priority patent/US3043108A/en
Application filed by Individual filed Critical Individual
Priority to GB2462858A priority patent/GB848534A/en
Priority to FR1210085D priority patent/FR1210085A/fr
Priority to BE570620A priority patent/BE570620A/xx
Publication of GB848534A publication Critical patent/GB848534A/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)
  • Forklifts And Lifting Vehicles (AREA)
GB2462858A 1956-11-07 1958-07-31 Mine roof bars Expired GB848534A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
DEV11478A DE1078070B (de) 1956-11-07 1956-11-07 Loesbare Kappenverbindung fuer Grubenbetriebe unter Tage
US748843A US3043108A (en) 1958-07-16 1958-07-16 Mine roof bar arrangement
GB2462858A GB848534A (en) 1958-07-31 1958-07-31 Mine roof bars
FR1210085D FR1210085A (fr) 1958-07-31 1958-08-23 Assemblage de flandres métalliques démontable pour exploitations minières souterraines
BE570620A BE570620A (enrdf_load_stackoverflow) 1958-07-31 1958-08-25

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2462858A GB848534A (en) 1958-07-31 1958-07-31 Mine roof bars

Publications (1)

Publication Number Publication Date
GB848534A true GB848534A (en) 1960-09-21

Family

ID=10214697

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2462858A Expired GB848534A (en) 1956-11-07 1958-07-31 Mine roof bars

Country Status (3)

Country Link
BE (1) BE570620A (enrdf_load_stackoverflow)
FR (1) FR1210085A (enrdf_load_stackoverflow)
GB (1) GB848534A (enrdf_load_stackoverflow)

Also Published As

Publication number Publication date
FR1210085A (fr) 1960-03-07
BE570620A (enrdf_load_stackoverflow) 1958-09-15

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