FR1002757A - Perfectionnements aux étais de mines - Google Patents

Perfectionnements aux étais de mines

Info

Publication number
FR1002757A
FR1002757A FR1002757DA FR1002757A FR 1002757 A FR1002757 A FR 1002757A FR 1002757D A FR1002757D A FR 1002757DA FR 1002757 A FR1002757 A FR 1002757A
Authority
FR
France
Prior art keywords
mine props
props
mine
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)
Inventor
John Maurice Towler
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.)
Mavor and Coulson Ltd
Original Assignee
Mavor and Coulson Ltd
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 Mavor and Coulson Ltd filed Critical Mavor and Coulson Ltd
Application granted granted Critical
Publication of FR1002757A publication Critical patent/FR1002757A/fr
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21D23/08—Advancing mechanisms
    • E21D23/081—Advancing mechanisms forming parts of the roof supports
    • E21D23/082—Advancing mechanisms forming parts of the roof supports acting solely on the elements of the supports

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)
FR1002757D 1949-12-13 1949-12-13 Perfectionnements aux étais de mines Expired FR1002757A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1002757T 1949-12-13

Publications (1)

Publication Number Publication Date
FR1002757A true FR1002757A (fr) 1952-03-10

Family

ID=9562420

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1002757D Expired FR1002757A (fr) 1949-12-13 1949-12-13 Perfectionnements aux étais de mines

Country Status (1)

Country Link
FR (1) FR1002757A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539810A1 (fr) * 1983-01-25 1984-07-27 Manche Atel Chantiers Pile mobile de soutenement a lemniscate a embase en deux elements pouvant etre ripes independamment l'un de l'autre

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539810A1 (fr) * 1983-01-25 1984-07-27 Manche Atel Chantiers Pile mobile de soutenement a lemniscate a embase en deux elements pouvant etre ripes independamment l'un de l'autre

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