FR1467272A - Improvements to support extensions, especially for mines - Google Patents

Improvements to support extensions, especially for mines

Info

Publication number
FR1467272A
FR1467272A FR69046674A FR69046674A FR1467272A FR 1467272 A FR1467272 A FR 1467272A FR 69046674 A FR69046674 A FR 69046674A FR 69046674 A FR69046674 A FR 69046674A FR 1467272 A FR1467272 A FR 1467272A
Authority
FR
France
Prior art keywords
mines
support extensions
extensions
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
FR69046674A
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.)
Bennes Marrel SA
Original Assignee
Bennes Marrel 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 Bennes Marrel SA filed Critical Bennes Marrel SA
Priority to FR69046674A priority Critical patent/FR1467272A/en
Application granted granted Critical
Publication of FR1467272A publication Critical patent/FR1467272A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E21D23/066—Pivoted cantilever extensions therefor
FR69046674A 1965-12-06 1965-12-06 Improvements to support extensions, especially for mines Expired FR1467272A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR69046674A FR1467272A (en) 1965-12-06 1965-12-06 Improvements to support extensions, especially for mines

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR69046674A FR1467272A (en) 1965-12-06 1965-12-06 Improvements to support extensions, especially for mines

Publications (1)

Publication Number Publication Date
FR1467272A true FR1467272A (en) 1967-01-27

Family

ID=1583328

Family Applications (1)

Application Number Title Priority Date Filing Date
FR69046674A Expired FR1467272A (en) 1965-12-06 1965-12-06 Improvements to support extensions, especially for mines

Country Status (1)

Country Link
FR (1) FR1467272A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534559A (en) * 1968-01-17 1970-10-20 Gullick Ltd Mine roof supports

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3534559A (en) * 1968-01-17 1970-10-20 Gullick Ltd Mine roof supports

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