NL284968A - - Google Patents

Info

Publication number
NL284968A
NL284968A NL284968DA NL284968A NL 284968 A NL284968 A NL 284968A NL 284968D A NL284968D A NL 284968DA NL 284968 A NL284968 A NL 284968A
Authority
NL
Netherlands
Application number
Publication of NL284968A publication Critical patent/NL284968A/xx

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
    • E21D17/082—Cap joints for obtaining a coal-face free of pit-props of sliding type
    • 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
    • E21D23/0052—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
NL284968D NL284968A (en)

Publications (1)

Publication Number Publication Date
NL284968A true NL284968A (en)

Family

ID=1872460

Family Applications (1)

Application Number Title Priority Date Filing Date
NL284968D NL284968A (en)

Country Status (1)

Country Link
NL (1) NL284968A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5743679A (en) * 1995-08-02 1998-04-28 Dbt Deutsche Bergbau-Technik Gmbh Hydraulic shield support frame

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5743679A (en) * 1995-08-02 1998-04-28 Dbt Deutsche Bergbau-Technik Gmbh Hydraulic shield support frame

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