GB1213019A - Improvements in or relating to underground roof support systems - Google Patents

Improvements in or relating to underground roof support systems

Info

Publication number
GB1213019A
GB1213019A GB772568A GB772568A GB1213019A GB 1213019 A GB1213019 A GB 1213019A GB 772568 A GB772568 A GB 772568A GB 772568 A GB772568 A GB 772568A GB 1213019 A GB1213019 A GB 1213019A
Authority
GB
United Kingdom
Prior art keywords
roof support
frames
rams
frame
relating
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
GB772568A
Inventor
Thomas Graeme Oxley
Phillip Brown
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.)
AG Wild and Co Ltd
Original Assignee
AG Wild and 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 AG Wild and Co Ltd filed Critical AG Wild and Co Ltd
Priority to GB772568A priority Critical patent/GB1213019A/en
Publication of GB1213019A publication Critical patent/GB1213019A/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
    • E21D23/0052—Mine roof supports for step- by- step movement, e.g. in combination with provisions for shifting of conveyors, mining machines, or guides therefor with advancing shifting devices connected therewith

Abstract

1,213,019. Advancing hydraulic mine roof support. A. G. WILD & CO. Ltd. 17 Feb., 1969 [16 Feb., 1968], No. 7725/68. Heading E1P. An advancing mine roof support comprises two main frames 20, 21 linked by rams 9 and ties 13 (i.e. a contractible member with a fixed maximum length); a first slave frame 22 is pivotally connected to main frame 21 by ties 13 and struts 25 (i.e. an extensible member with a fixed minimum length) the struts may be replaced by rams; a second slave frame 23 is pivotally connected to frame 22 similarly to the connection between frames 22 and 21. Four of each connector/connection between two adjacent frames may be used, i.e. one at each end of the props 3 and 4. Three prop frames and pneumatic or hydraulic rams may be used.
GB772568A 1968-02-16 1968-02-16 Improvements in or relating to underground roof support systems Expired GB1213019A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB772568A GB1213019A (en) 1968-02-16 1968-02-16 Improvements in or relating to underground roof support systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB772568A GB1213019A (en) 1968-02-16 1968-02-16 Improvements in or relating to underground roof support systems

Publications (1)

Publication Number Publication Date
GB1213019A true GB1213019A (en) 1970-11-18

Family

ID=9838557

Family Applications (1)

Application Number Title Priority Date Filing Date
GB772568A Expired GB1213019A (en) 1968-02-16 1968-02-16 Improvements in or relating to underground roof support systems

Country Status (1)

Country Link
GB (1) GB1213019A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813886A (en) * 1973-01-02 1974-06-04 G Alacchi Travelling shoring apparatus
US3855808A (en) * 1973-09-12 1974-12-24 G Alacchi Shifting system for walking supports
DE2604316A1 (en) * 1976-02-05 1977-08-18 Gewerk Eisenhuette Westfalia GUIDANCE AND ALIGNMENT DEVICE FOR RETURNABLE EXTENSION UNITS
US4256343A (en) * 1979-05-16 1981-03-17 Fairchild Incorporated Mechanism for advancing continuous mining machine through mining cycle and tramming modes
GB2136040A (en) * 1983-03-08 1984-09-12 Dobson Park Ind Pivotal linkage of a mine roof support

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3813886A (en) * 1973-01-02 1974-06-04 G Alacchi Travelling shoring apparatus
US3855808A (en) * 1973-09-12 1974-12-24 G Alacchi Shifting system for walking supports
DE2604316A1 (en) * 1976-02-05 1977-08-18 Gewerk Eisenhuette Westfalia GUIDANCE AND ALIGNMENT DEVICE FOR RETURNABLE EXTENSION UNITS
US4073151A (en) * 1976-02-05 1978-02-14 Gewerkschaft Eisenhutte Westfalia Mine roof support assemblies
US4256343A (en) * 1979-05-16 1981-03-17 Fairchild Incorporated Mechanism for advancing continuous mining machine through mining cycle and tramming modes
GB2136040A (en) * 1983-03-08 1984-09-12 Dobson Park Ind Pivotal linkage of a mine roof support

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Legal Events

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