GB2214216B - Mine roof supports and sprags therefor - Google Patents

Mine roof supports and sprags therefor

Info

Publication number
GB2214216B
GB2214216B GB8800442A GB8800442A GB2214216B GB 2214216 B GB2214216 B GB 2214216B GB 8800442 A GB8800442 A GB 8800442A GB 8800442 A GB8800442 A GB 8800442A GB 2214216 B GB2214216 B GB 2214216B
Authority
GB
United Kingdom
Prior art keywords
sprags
therefor
mine roof
roof supports
supports
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 - Fee Related
Application number
GB8800442A
Other versions
GB8800442D0 (en
GB2214216A (en
Inventor
John Henry Waters
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.)
Gullick Dobson Ltd
Original Assignee
Gullick Dobson 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 Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Priority to GB8800442A priority Critical patent/GB2214216B/en
Publication of GB8800442D0 publication Critical patent/GB8800442D0/en
Publication of GB2214216A publication Critical patent/GB2214216A/en
Application granted granted Critical
Publication of GB2214216B publication Critical patent/GB2214216B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • E21D23/0454—Trailing plates; Coal face or goaf side sprags

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)
  • Tents Or Canopies (AREA)
GB8800442A 1988-01-09 1988-01-09 Mine roof supports and sprags therefor Expired - Fee Related GB2214216B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8800442A GB2214216B (en) 1988-01-09 1988-01-09 Mine roof supports and sprags therefor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8800442A GB2214216B (en) 1988-01-09 1988-01-09 Mine roof supports and sprags therefor

Publications (3)

Publication Number Publication Date
GB8800442D0 GB8800442D0 (en) 1988-02-10
GB2214216A GB2214216A (en) 1989-08-31
GB2214216B true GB2214216B (en) 1992-02-05

Family

ID=10629707

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8800442A Expired - Fee Related GB2214216B (en) 1988-01-09 1988-01-09 Mine roof supports and sprags therefor

Country Status (1)

Country Link
GB (1) GB2214216B (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201713A (en) * 1987-02-14 1988-09-07 Dowty Mining Equipment Ltd Mine roof support with face sprag

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2201713A (en) * 1987-02-14 1988-09-07 Dowty Mining Equipment Ltd Mine roof support with face sprag

Also Published As

Publication number Publication date
GB8800442D0 (en) 1988-02-10
GB2214216A (en) 1989-08-31

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20040109