FR1077857A - Perfectionnement aux supports de toit dans les mines - Google Patents

Perfectionnement aux supports de toit dans les mines

Info

Publication number
FR1077857A
FR1077857A FR1077857DA FR1077857A FR 1077857 A FR1077857 A FR 1077857A FR 1077857D A FR1077857D A FR 1077857DA FR 1077857 A FR1077857 A FR 1077857A
Authority
FR
France
Prior art keywords
mines
further training
roof supports
roof
supports
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
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.)
Mining Engineering Co Ltd MECO
Original Assignee
Mining Engineering Co Ltd MECO
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 Mining Engineering Co Ltd MECO filed Critical Mining Engineering Co Ltd MECO
Application granted granted Critical
Publication of FR1077857A publication Critical patent/FR1077857A/fr
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/60—Devices for withdrawing props or chocks
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/58—Devices for setting props or chocks
    • E21D15/581—Devices for setting props or chocks in which the props are pre- loaded
    • E21D15/5813—Devices for setting props or chocks in which the props are pre- loaded by means of power accumulators to be pre-charged by rock 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)
FR1077857D 1952-05-27 1953-05-27 Perfectionnement aux supports de toit dans les mines Expired FR1077857A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1077857X 1952-05-27

Publications (1)

Publication Number Publication Date
FR1077857A true FR1077857A (fr) 1954-11-12

Family

ID=10872322

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1077857D Expired FR1077857A (fr) 1952-05-27 1953-05-27 Perfectionnement aux supports de toit dans les mines

Country Status (1)

Country Link
FR (1) FR1077857A (fr)

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