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FR838366A - Pressure trigger for mine pillars - Google Patents

Pressure trigger for mine pillars

Info

Publication number
FR838366A
FR838366A FR838366DA FR838366A FR 838366 A FR838366 A FR 838366A FR 838366D A FR838366D A FR 838366DA FR 838366 A FR838366 A FR 838366A
Authority
FR
France
Prior art keywords
pressure trigger
pillars
mine
mine pillars
trigger
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)
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.)
GEWERKSCHAFT CHRISTINE
Original Assignee
GEWERKSCHAFT CHRISTINE
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 GEWERKSCHAFT CHRISTINE filed Critical GEWERKSCHAFT CHRISTINE
Application granted granted Critical
Publication of FR838366A publication Critical patent/FR838366A/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
    • E21D15/60—Devices for withdrawing props or chocks

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)
FR838366D 1938-03-14 1938-05-24 Pressure trigger for mine pillars Expired FR838366A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE838366X 1938-03-14

Publications (1)

Publication Number Publication Date
FR838366A true FR838366A (en) 1939-03-03

Family

ID=6761637

Family Applications (1)

Application Number Title Priority Date Filing Date
FR838366D Expired FR838366A (en) 1938-03-14 1938-05-24 Pressure trigger for mine pillars

Country Status (1)

Country Link
FR (1) FR838366A (en)

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