GB2235234B - Mine roof supports - Google Patents

Mine roof supports

Info

Publication number
GB2235234B
GB2235234B GB8928149A GB8928149A GB2235234B GB 2235234 B GB2235234 B GB 2235234B GB 8928149 A GB8928149 A GB 8928149A GB 8928149 A GB8928149 A GB 8928149A GB 2235234 B GB2235234 B GB 2235234B
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
GB8928149A
Other versions
GB2235234A (en
GB8928149D0 (en
Inventor
Robert Graham Harris
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.)
MECO ELECTRONICS Ltd
Original Assignee
MECO ELECTRONICS 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 MECO ELECTRONICS Ltd filed Critical MECO ELECTRONICS Ltd
Priority to GB8928149A priority Critical patent/GB2235234B/en
Publication of GB8928149D0 publication Critical patent/GB8928149D0/en
Publication of GB2235234A publication Critical patent/GB2235234A/en
Application granted granted Critical
Publication of GB2235234B publication Critical patent/GB2235234B/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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/26—Hydraulic or pneumatic control
GB8928149A 1989-12-13 1989-12-13 Mine roof supports Expired - Fee Related GB2235234B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8928149A GB2235234B (en) 1989-12-13 1989-12-13 Mine roof supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8928149A GB2235234B (en) 1989-12-13 1989-12-13 Mine roof supports

Publications (3)

Publication Number Publication Date
GB8928149D0 GB8928149D0 (en) 1990-02-14
GB2235234A GB2235234A (en) 1991-02-27
GB2235234B true GB2235234B (en) 1993-06-30

Family

ID=10667877

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8928149A Expired - Fee Related GB2235234B (en) 1989-12-13 1989-12-13 Mine roof supports

Country Status (1)

Country Link
GB (1) GB2235234B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2245632A (en) * 1990-06-26 1992-01-08 Gullick Dobson Ltd Mine roof support
GB9122146D0 (en) * 1991-10-18 1991-11-27 Gullick Dobson Ltd Mine roof supports
DE19636389B4 (en) * 1996-09-07 2004-03-11 Dbt Automation Gmbh Method and device for load monitoring of hydraulic shield removal frames for underground mining

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118603A (en) * 1982-04-06 1983-11-02 Gewerk Eisenhuette Westfalia Control apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2118603A (en) * 1982-04-06 1983-11-02 Gewerk Eisenhuette Westfalia Control apparatus

Also Published As

Publication number Publication date
GB2235234A (en) 1991-02-27
GB8928149D0 (en) 1990-02-14

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Legal Events

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

Effective date: 19951213