PL76221B1 - - Google Patents

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Publication number
PL76221B1
PL76221B1 PL15846872A PL15846872A PL76221B1 PL 76221 B1 PL76221 B1 PL 76221B1 PL 15846872 A PL15846872 A PL 15846872A PL 15846872 A PL15846872 A PL 15846872A PL 76221 B1 PL76221 B1 PL 76221B1
Authority
PL
Poland
Prior art keywords
canopy
additional
main
pin
lever
Prior art date
Application number
PL15846872A
Other languages
English (en)
Polish (pl)
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 filed Critical
Publication of PL76221B1 publication Critical patent/PL76221B1/pl

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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
    • E21D17/04—Cantilever extension or similar protecting devices for use in longwall working
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D23/00—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E21D23/066—Pivoted cantilever extensions therefor

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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
  • Pivots And Pivotal Connections (AREA)
PL15846872A 1971-10-27 1972-10-25 PL76221B1 (en, 2012)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19712153496 DE2153496C3 (de) 1971-10-27 1971-10-27 Schreitendes Strebausbaugestell

Publications (1)

Publication Number Publication Date
PL76221B1 true PL76221B1 (en, 2012) 1975-02-28

Family

ID=5823521

Family Applications (1)

Application Number Title Priority Date Filing Date
PL15846872A PL76221B1 (en, 2012) 1971-10-27 1972-10-25

Country Status (2)

Country Link
DE (1) DE2153496C3 (en, 2012)
PL (1) PL76221B1 (en, 2012)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2601341A1 (de) * 1976-01-15 1977-07-28 Kloeckner Werke Ag Ausbaueinheit fuer untertaegige strebbetriebe
GB2048355A (en) * 1979-05-08 1980-12-10 Gewerk Eisenhuette Westfalia Mine roof supports
CN114607433B (zh) * 2022-04-11 2024-08-09 内蒙古工业大学 主动安全液压支架步足式顶梁装置

Also Published As

Publication number Publication date
DE2153496A1 (de) 1973-06-28
DE2153496C3 (de) 1978-12-14
DE2153496B2 (de) 1978-04-20

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