NL229339A - - Google Patents

Info

Publication number
NL229339A
NL229339A NL229339DA NL229339A NL 229339 A NL229339 A NL 229339A NL 229339D A NL229339D A NL 229339DA NL 229339 A NL229339 A NL 229339A
Authority
NL
Netherlands
Application number
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.)
Publication of NL229339A publication Critical patent/NL229339A/xx

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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

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)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
NL229339D 1957-07-04 NL229339A (enrdf_load_stackoverflow)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2112157A GB891140A (en) 1957-07-04 1957-07-04 Improvements in or relating to mine roof supporting bars

Publications (1)

Publication Number Publication Date
NL229339A true NL229339A (enrdf_load_stackoverflow)

Family

ID=10157548

Family Applications (1)

Application Number Title Priority Date Filing Date
NL229339D NL229339A (enrdf_load_stackoverflow) 1957-07-04

Country Status (4)

Country Link
BE (1) BE569133A (enrdf_load_stackoverflow)
FR (1) FR1207659A (enrdf_load_stackoverflow)
GB (1) GB891140A (enrdf_load_stackoverflow)
NL (1) NL229339A (enrdf_load_stackoverflow)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1037920A (en) * 1962-01-29 1966-08-03 Groetschel Karl Maria Improvements relating to roof supports for mine workings

Also Published As

Publication number Publication date
GB891140A (en) 1962-03-14
FR1207659A (fr) 1960-02-18
BE569133A (enrdf_load_stackoverflow)

Similar Documents

Publication Publication Date Title
AT213527B (enrdf_load_stackoverflow)
BE559788A (enrdf_load_stackoverflow)
BE569112A (enrdf_load_stackoverflow)
BE564054A (enrdf_load_stackoverflow)
BE440565A (enrdf_load_stackoverflow)
BE520333A (enrdf_load_stackoverflow)
BE547036A (enrdf_load_stackoverflow)
BE551270A (enrdf_load_stackoverflow)
BE555289A (enrdf_load_stackoverflow)
BE555512A (enrdf_load_stackoverflow)
BE556117A (enrdf_load_stackoverflow)
BE556275A (enrdf_load_stackoverflow)
BE556286A (enrdf_load_stackoverflow)
BE556671A (enrdf_load_stackoverflow)
BE556888A (enrdf_load_stackoverflow)
BE557151A (enrdf_load_stackoverflow)
BE557407A (enrdf_load_stackoverflow)
BE557752A (enrdf_load_stackoverflow)
BE558075A (enrdf_load_stackoverflow)
BE558129A (enrdf_load_stackoverflow)
BE558947A (enrdf_load_stackoverflow)
BE560287A (enrdf_load_stackoverflow)
BE560467A (enrdf_load_stackoverflow)
BE561036A (enrdf_load_stackoverflow)
BE561534A (enrdf_load_stackoverflow)