BE459213A - - Google Patents

Info

Publication number
BE459213A
BE459213A BE459213DA BE459213A BE 459213 A BE459213 A BE 459213A BE 459213D A BE459213D A BE 459213DA BE 459213 A BE459213 A BE 459213A
Authority
BE
Belgium
Prior art keywords
circles
wood
buffer according
log
buffer
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE459213A publication Critical patent/BE459213A/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21DSHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14Telescopic props
    • E21D15/16Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure
    • E21D15/18Telescopic props with parts held together by positive means, with or without relative sliding movement when the prop is subject to excessive pressure with one part resting on a supporting medium, e.g. rubber, sand, bitumen, lead, located in the other part, with or without expulsion or displacement of the medium upon excessive pressure

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Absorbent Articles And Supports Therefor (AREA)
BE459213D BE459213A (cs)

Publications (1)

Publication Number Publication Date
BE459213A true BE459213A (cs)

Family

ID=112341

Family Applications (1)

Application Number Title Priority Date Filing Date
BE459213D BE459213A (cs)

Country Status (1)

Country Link
BE (1) BE459213A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2284024A1 (fr) * 1974-09-05 1976-04-02 Mine Support Syst Pty Ltd Etai compressible pour mine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2284024A1 (fr) * 1974-09-05 1976-04-02 Mine Support Syst Pty Ltd Etai compressible pour mine

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