GB8409793D0 - Roof support for mines - Google Patents

Roof support for mines

Info

Publication number
GB8409793D0
GB8409793D0 GB848409793A GB8409793A GB8409793D0 GB 8409793 D0 GB8409793 D0 GB 8409793D0 GB 848409793 A GB848409793 A GB 848409793A GB 8409793 A GB8409793 A GB 8409793A GB 8409793 D0 GB8409793 D0 GB 8409793D0
Authority
GB
United Kingdom
Prior art keywords
mines
roof support
roof
support
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.)
Granted
Application number
GB848409793A
Other versions
GB2138876B (en
GB2138876A (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.)
Dowty Mining Equipment Ltd
Original Assignee
Dowty Mining Equipment 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
Priority claimed from GB838311825A external-priority patent/GB8311825D0/en
Application filed by Dowty Mining Equipment Ltd filed Critical Dowty Mining Equipment Ltd
Priority to GB08409793A priority Critical patent/GB2138876B/en
Publication of GB8409793D0 publication Critical patent/GB8409793D0/en
Publication of GB2138876A publication Critical patent/GB2138876A/en
Application granted granted Critical
Publication of GB2138876B publication Critical patent/GB2138876B/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
    • E21D23/04—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)
  • Architecture (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Roof Covering Using Slabs Or Stiff Sheets (AREA)
GB08409793A 1983-04-29 1984-04-16 Roof support suitable for use in mines Expired GB2138876B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08409793A GB2138876B (en) 1983-04-29 1984-04-16 Roof support suitable for use in mines

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB838311825A GB8311825D0 (en) 1983-04-29 1983-04-29 Roof support
GB08409793A GB2138876B (en) 1983-04-29 1984-04-16 Roof support suitable for use in mines

Publications (3)

Publication Number Publication Date
GB8409793D0 true GB8409793D0 (en) 1984-05-23
GB2138876A GB2138876A (en) 1984-10-31
GB2138876B GB2138876B (en) 1986-09-17

Family

ID=26285990

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08409793A Expired GB2138876B (en) 1983-04-29 1984-04-16 Roof support suitable for use in mines

Country Status (1)

Country Link
GB (1) GB2138876B (en)

Also Published As

Publication number Publication date
GB2138876B (en) 1986-09-17
GB2138876A (en) 1984-10-31

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19940416