GB709241A - Improvements relating to cap shoes for mine roof supports - Google Patents

Improvements relating to cap shoes for mine roof supports

Info

Publication number
GB709241A
GB709241A GB5535/52A GB553552A GB709241A GB 709241 A GB709241 A GB 709241A GB 5535/52 A GB5535/52 A GB 5535/52A GB 553552 A GB553552 A GB 553552A GB 709241 A GB709241 A GB 709241A
Authority
GB
United Kingdom
Prior art keywords
bar
mine roof
shoe
improvements relating
screw
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
GB5535/52A
Other languages
English (en)
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.)
Directie van de Staatsmijnen in Limburg
Original Assignee
Directie van de Staatsmijnen in Limburg
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 Directie van de Staatsmijnen in Limburg filed Critical Directie van de Staatsmijnen in Limburg
Publication of GB709241A publication Critical patent/GB709241A/en
Expired legal-status Critical Current

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)
  • Bridges Or Land Bridges (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
GB5535/52A 1951-03-07 1952-03-03 Improvements relating to cap shoes for mine roof supports Expired GB709241A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL709240X 1951-03-07
NL760654X 1953-10-29

Publications (1)

Publication Number Publication Date
GB709241A true GB709241A (en) 1954-05-19

Family

ID=31980708

Family Applications (3)

Application Number Title Priority Date Filing Date
GB5534/52A Expired GB709240A (en) 1951-03-07 1952-03-03 Improvements relating to roof supporting structures, as used in mines
GB5535/52A Expired GB709241A (en) 1951-03-07 1952-03-03 Improvements relating to cap shoes for mine roof supports
GB30683/54A Expired GB760654A (en) 1951-03-07 1954-10-25 Improvements in and relating to mine roof supporting structures

Family Applications Before (1)

Application Number Title Priority Date Filing Date
GB5534/52A Expired GB709240A (en) 1951-03-07 1952-03-03 Improvements relating to roof supporting structures, as used in mines

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB30683/54A Expired GB760654A (en) 1951-03-07 1954-10-25 Improvements in and relating to mine roof supporting structures

Country Status (4)

Country Link
BE (3) BE509662A (de)
FR (3) FR1051786A (de)
GB (3) GB709240A (de)
NL (4) NL159679A (de)

Also Published As

Publication number Publication date
GB709240A (en) 1954-05-19
FR1051786A (fr) 1954-01-19
NL159679A (de)
BE532795A (de)
BE509661A (de)
FR1051869A (fr) 1954-01-19
NL89595C (de)
GB760654A (en) 1956-11-07
BE509662A (de)
NL182433B (nl)
FR67282E (fr)
NL159680B (nl)

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