FR1255432A - Pile d'étançons à commande hydraulique du déplacement - Google Patents

Pile d'étançons à commande hydraulique du déplacement

Info

Publication number
FR1255432A
FR1255432A FR816675A FR816675A FR1255432A FR 1255432 A FR1255432 A FR 1255432A FR 816675 A FR816675 A FR 816675A FR 816675 A FR816675 A FR 816675A FR 1255432 A FR1255432 A FR 1255432A
Authority
FR
France
Prior art keywords
props
stack
displacement control
hydraulic displacement
hydraulic
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
FR816675A
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.)
Sagem SA
Original Assignee
Sagem SA
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 Sagem SA filed Critical Sagem SA
Priority to FR816675A priority Critical patent/FR1255432A/fr
Priority to GB237361A priority patent/GB915998A/en
Application granted granted Critical
Publication of FR1255432A publication Critical patent/FR1255432A/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
    • E21D23/0082—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor specially adapted for vertical or steep gradient seams
    • 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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith

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)
  • Generation Of Surge Voltage And Current (AREA)
FR816675A 1960-01-26 1960-01-26 Pile d'étançons à commande hydraulique du déplacement Expired FR1255432A (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
FR816675A FR1255432A (fr) 1960-01-26 1960-01-26 Pile d'étançons à commande hydraulique du déplacement
GB237361A GB915998A (en) 1960-01-26 1961-01-20 Improvements in or relating to pit-prop assemblies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR816675A FR1255432A (fr) 1960-01-26 1960-01-26 Pile d'étançons à commande hydraulique du déplacement

Publications (1)

Publication Number Publication Date
FR1255432A true FR1255432A (fr) 1961-03-10

Family

ID=8724316

Family Applications (1)

Application Number Title Priority Date Filing Date
FR816675A Expired FR1255432A (fr) 1960-01-26 1960-01-26 Pile d'étançons à commande hydraulique du déplacement

Country Status (2)

Country Link
FR (1) FR1255432A (fr)
GB (1) GB915998A (fr)

Also Published As

Publication number Publication date
GB915998A (en) 1963-01-16

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