GB709240A - Improvements relating to roof supporting structures, as used in mines - Google Patents

Improvements relating to roof supporting structures, as used in mines

Info

Publication number
GB709240A
GB709240A GB5534/52A GB553452A GB709240A GB 709240 A GB709240 A GB 709240A GB 5534/52 A GB5534/52 A GB 5534/52A GB 553452 A GB553452 A GB 553452A GB 709240 A GB709240 A GB 709240A
Authority
GB
United Kingdom
Prior art keywords
bar
roof supporting
pin
mines
supporting structures
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
GB5534/52A
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 GB709240A publication Critical patent/GB709240A/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)
GB5534/52A 1951-03-07 1952-03-03 Improvements relating to roof supporting structures, as used in mines Expired GB709240A (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
GB709240A true GB709240A (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 After (2)

Application Number Title Priority Date Filing Date
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

Country Status (4)

Country Link
BE (3) BE532795A (xx)
FR (3) FR1051786A (xx)
GB (3) GB709240A (xx)
NL (4) NL182433B (xx)

Also Published As

Publication number Publication date
BE532795A (xx)
BE509662A (xx)
GB760654A (en) 1956-11-07
NL182433B (nl)
FR1051786A (fr) 1954-01-19
GB709241A (en) 1954-05-19
NL159679A (xx)
NL89595C (xx)
FR1051869A (fr) 1954-01-19
BE509661A (xx)
NL159680B (nl)
FR67282E (fr)

Similar Documents

Publication Publication Date Title
GB709240A (en) Improvements relating to roof supporting structures, as used in mines
GB950066A (en) Improvements in or relating to advancing roof supporting means for mines
GB773407A (en) Improvements in or relating to chocks, props and like roof supporting structures formines
GB750229A (en) Improvements in and relating to the fixing of roof-supporting bars in coal mining
GB865922A (en) Mine roof supports
GB720383A (en) Improvements in or relating to hydraulic pit props, chocks and like hydraulic miningappliances, hydraulic jacks and the like
GB760604A (en) Improvements in lagging irons for use in mines
GB871650A (en) Improvements in or relating to grabs
GB1249412A (en) Improvements in or relating to mine roof supports
GB709242A (en) Cap shoe for mine roof supports
GB709243A (en) Improvements relating to mine-roof supporting structures
GB998336A (en) Improvements in or relating to mine roof and like supports
GB1045353A (en) Improvements in or relating to mine roof supports
GB756069A (en) Improvements in or relating to coal face shoring structures
GB960188A (en) Improvements in or relating to mechanical shovels
GB1217466A (en) Improvements in or relating to devices for the extension of pit props
GB819072A (en) Improvements relating to hook means for attaching a weight to the end of a measuringtape
GB676583A (en) Improvements in or relating to pit props
GB704296A (en) Improvements in or relating to metal props for mines and the like
GB720560A (en) Clamp for tube scaffolds
GB924752A (en) Improvements in machines for the winning of coal or other minerals
GB794008A (en) Roof bar for mine roof support systems
GB934062A (en) Improvements in or relating to roof supports for mines
GB686434A (en) Tongs for widening out tubing or the like
GB748081A (en) Connecting means for mine roof-supporting bars