FR1015257A - Mine extension - Google Patents

Mine extension

Info

Publication number
FR1015257A
FR1015257A FR1015257DA FR1015257A FR 1015257 A FR1015257 A FR 1015257A FR 1015257D A FR1015257D A FR 1015257DA FR 1015257 A FR1015257 A FR 1015257A
Authority
FR
France
Prior art keywords
mine
extension
mine extension
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.)
Sambre & Meuse Usines
Original Assignee
Sambre & Meuse Usines
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 Sambre & Meuse Usines filed Critical Sambre & Meuse Usines
Application granted granted Critical
Publication of FR1015257A publication Critical patent/FR1015257A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D17/00—Caps for supporting mine roofs
    • E21D17/02—Cantilever extension or similar protecting devices
    • E21D17/08—Cap joints for obtaining a coal-face free of pit-props
    • E21D17/086—Cap joints for obtaining a coal-face free of pit-props or articulated type
FR1015257D 1950-03-28 1950-03-28 Mine extension Expired FR1015257A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1015257T 1950-03-28

Publications (1)

Publication Number Publication Date
FR1015257A true FR1015257A (en) 1952-09-15

Family

ID=9572894

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1015257D Expired FR1015257A (en) 1950-03-28 1950-03-28 Mine extension

Country Status (1)

Country Link
FR (1) FR1015257A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820085A (en) * 1986-12-01 1989-04-11 Heiliger Martha C Articulating steel cap for underground mining support structures

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4820085A (en) * 1986-12-01 1989-04-11 Heiliger Martha C Articulating steel cap for underground mining support structures

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