GB2201986B - Mine roof supports - Google Patents

Mine roof supports

Info

Publication number
GB2201986B
GB2201986B GB8803950A GB8803950A GB2201986B GB 2201986 B GB2201986 B GB 2201986B GB 8803950 A GB8803950 A GB 8803950A GB 8803950 A GB8803950 A GB 8803950A GB 2201986 B GB2201986 B GB 2201986B
Authority
GB
United Kingdom
Prior art keywords
mine roof
roof supports
supports
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 - Fee Related
Application number
GB8803950A
Other versions
GB2201986A (en
GB8803950D0 (en
Inventor
Stuart R Lee
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
Priority claimed from GB878705558A external-priority patent/GB8705558D0/en
Priority claimed from GB878712279A external-priority patent/GB8712279D0/en
Application filed by Gullick Dobson Ltd filed Critical Gullick Dobson Ltd
Publication of GB8803950D0 publication Critical patent/GB8803950D0/en
Publication of GB2201986A publication Critical patent/GB2201986A/en
Application granted granted Critical
Publication of GB2201986B publication Critical patent/GB2201986B/en
Anticipated expiration legal-status Critical
Expired - Fee Related 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
    • E21D23/04—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
    • E21D23/066—Pivoted cantilever extensions therefor
GB8803950A 1987-03-10 1988-02-19 Mine roof supports Expired - Fee Related GB2201986B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB878705558A GB8705558D0 (en) 1987-03-10 1987-03-10 Mine roof supports
GB878712279A GB8712279D0 (en) 1987-05-23 1987-05-23 Mine roof supports

Publications (3)

Publication Number Publication Date
GB8803950D0 GB8803950D0 (en) 1988-03-23
GB2201986A GB2201986A (en) 1988-09-14
GB2201986B true GB2201986B (en) 1990-11-07

Family

ID=26291993

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8803950A Expired - Fee Related GB2201986B (en) 1987-03-10 1988-02-19 Mine roof supports

Country Status (1)

Country Link
GB (1) GB2201986B (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB924372A (en) * 1959-03-18 1963-04-24 Willy Eggemann Improvements in or relating to roof support elements for mines
GB1521581A (en) * 1977-02-11 1978-08-16 Fletcher Sutcliffe Wild Ltd Mine roof supports
GB2026581A (en) * 1978-07-18 1980-02-06 Fletcher Sutcliffer Wild Ltd Mining equipment

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB924372A (en) * 1959-03-18 1963-04-24 Willy Eggemann Improvements in or relating to roof support elements for mines
GB1521581A (en) * 1977-02-11 1978-08-16 Fletcher Sutcliffe Wild Ltd Mine roof supports
GB2026581A (en) * 1978-07-18 1980-02-06 Fletcher Sutcliffer Wild Ltd Mining equipment

Also Published As

Publication number Publication date
GB2201986A (en) 1988-09-14
GB8803950D0 (en) 1988-03-23

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Legal Events

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

Effective date: 19940219