AU6004873A - Improvements in or relating to mine roof chocks - Google Patents

Improvements in or relating to mine roof chocks

Info

Publication number
AU6004873A
AU6004873A AU60048/73A AU6004873A AU6004873A AU 6004873 A AU6004873 A AU 6004873A AU 60048/73 A AU60048/73 A AU 60048/73A AU 6004873 A AU6004873 A AU 6004873A AU 6004873 A AU6004873 A AU 6004873A
Authority
AU
Australia
Prior art keywords
chocks
relating
mine roof
mine
roof
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
AU60048/73A
Other versions
AU484497B2 (en
Inventor
Harry Rosenberg Walter Weirich
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.)
Gewerkschaft Eisenhutte Westfalia GmbH
Original Assignee
Gewerkschaft Eisenhutte Westfalia GmbH
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 Gewerkschaft Eisenhutte Westfalia GmbH filed Critical Gewerkschaft Eisenhutte Westfalia GmbH
Application granted granted Critical
Publication of AU6004873A publication Critical patent/AU6004873A/en
Publication of AU484497B2 publication Critical patent/AU484497B2/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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
    • E21D23/006—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor provided with essential hydraulic devices

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)
  • Lifting Devices For Agricultural Implements (AREA)
  • Fluid-Pressure Circuits (AREA)
AU60048/73A 1972-09-14 1973-09-05 Improvements in or relating to mine roof chocks Expired AU484497B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE7233815 1972-09-14
DEDE072338 1972-09-14

Publications (2)

Publication Number Publication Date
AU6004873A true AU6004873A (en) 1975-03-06
AU484497B2 AU484497B2 (en) 1975-03-06

Family

ID=

Also Published As

Publication number Publication date
FR2200437A1 (en) 1974-04-19
GB1437449A (en) 1976-05-26
US3889481A (en) 1975-06-17
BE795481A (en) 1973-05-29
FR2200437B1 (en) 1982-07-30

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