FR1201325A - New hydromechanical prop for mines - Google Patents

New hydromechanical prop for mines

Info

Publication number
FR1201325A
FR1201325A FR1201325DA FR1201325A FR 1201325 A FR1201325 A FR 1201325A FR 1201325D A FR1201325D A FR 1201325DA FR 1201325 A FR1201325 A FR 1201325A
Authority
FR
France
Prior art keywords
hydromechanical
mines
prop
new
new hydromechanical
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
Other languages
French (fr)
Inventor
Jean Varay
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
Application granted granted Critical
Publication of FR1201325A publication Critical patent/FR1201325A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/15—Means counteracting entry of dirt; Built-in cleaning devices
    • E21D15/155—Built-in cleaning devices
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/50—Component parts or details of props
    • E21D15/51—Component parts or details of props specially adapted to hydraulic, pneumatic, or hydraulic-pneumatic props, e.g. arrangements of relief valves
    • E21D15/517—Extension elements

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)
FR1201325D 1958-08-14 1958-08-14 New hydromechanical prop for mines Expired FR1201325A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1201325T 1958-08-14

Publications (1)

Publication Number Publication Date
FR1201325A true FR1201325A (en) 1959-12-29

Family

ID=9671415

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1201325D Expired FR1201325A (en) 1958-08-14 1958-08-14 New hydromechanical prop for mines

Country Status (1)

Country Link
FR (1) FR1201325A (en)

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