AU5782673A - Improvements in or relating to mine roof supports - Google Patents

Improvements in or relating to mine roof supports

Info

Publication number
AU5782673A
AU5782673A AU57826/73A AU5782673A AU5782673A AU 5782673 A AU5782673 A AU 5782673A AU 57826/73 A AU57826/73 A AU 57826/73A AU 5782673 A AU5782673 A AU 5782673A AU 5782673 A AU5782673 A AU 5782673A
Authority
AU
Australia
Prior art keywords
relating
mine roof
roof supports
supports
mine
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
AU57826/73A
Other versions
AU487333B2 (en
Inventor
Shuttleworth Peter
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.)
Mastabar Mining Equipment Co Ltd
Original Assignee
Mastabar Mining Equipment Co Ltd
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 Mastabar Mining Equipment Co Ltd filed Critical Mastabar Mining Equipment Co Ltd
Application granted granted Critical
Publication of AU487333B2 publication Critical patent/AU487333B2/en
Publication of AU5782673A publication Critical patent/AU5782673A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • E21D23/006—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
    • E21D23/0073—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 with advancing shifting devices connected therewith
    • 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
    • E21D23/04—Structural features of the supporting construction, e.g. linking members between adjacent frames or sets of props; Means for counteracting lateral sliding on inclined floor
    • E21D23/06—Special mine caps or special tops of pit-props for permitting step-by-step movement
    • E21D23/063—Retractable cantilever extensions therefor

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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Body Structure For Vehicles (AREA)
  • Working Measures On Existing Buildindgs (AREA)
AU57826/73A 1972-07-14 1973-07-06 Improvements in or relating to mine roof supports Expired AU487333B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3300172A GB1408429A (en) 1972-07-14 1972-07-14 Mine roof supports
GBGB1972 1972-07-14

Publications (2)

Publication Number Publication Date
AU487333B2 AU487333B2 (en) 1975-01-09
AU5782673A true AU5782673A (en) 1975-01-09

Family

ID=

Also Published As

Publication number Publication date
GB1408429A (en) 1975-10-01
US3872678A (en) 1975-03-25
CA995908A (en) 1976-08-31

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