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FR1488664A - Two-piece mine roof support - Google Patents

Two-piece mine roof support

Info

Publication number
FR1488664A
FR1488664A FR71978A FR71978A FR1488664A FR 1488664 A FR1488664 A FR 1488664A FR 71978 A FR71978 A FR 71978A FR 71978 A FR71978 A FR 71978A FR 1488664 A FR1488664 A FR 1488664A
Authority
FR
France
Prior art keywords
roof support
mine roof
piece
piece mine
support
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
FR71978A
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.)
Coal Industry Patents Ltd
Original Assignee
Coal Industry Patents 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 Coal Industry Patents Ltd filed Critical Coal Industry Patents Ltd
Priority to FR71978A priority Critical patent/FR1488664A/en
Application granted granted Critical
Publication of FR1488664A publication Critical patent/FR1488664A/en
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
    • E21D23/0052—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)
FR71978A 1966-08-03 1966-08-03 Two-piece mine roof support Expired FR1488664A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR71978A FR1488664A (en) 1966-08-03 1966-08-03 Two-piece mine roof support

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR71978A FR1488664A (en) 1966-08-03 1966-08-03 Two-piece mine roof support

Publications (1)

Publication Number Publication Date
FR1488664A true FR1488664A (en) 1967-07-13

Family

ID=8614789

Family Applications (1)

Application Number Title Priority Date Filing Date
FR71978A Expired FR1488664A (en) 1966-08-03 1966-08-03 Two-piece mine roof support

Country Status (1)

Country Link
FR (1) FR1488664A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539810A1 (en) * 1983-01-25 1984-07-27 Manche Atel Chantiers Lemniscate-type movable supporting chock with a base made of two elements which can slide independently of each other

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2539810A1 (en) * 1983-01-25 1984-07-27 Manche Atel Chantiers Lemniscate-type movable supporting chock with a base made of two elements which can slide independently of each other

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