GB9719968D0 - Improvements in and relating to roof supports - Google Patents

Improvements in and relating to roof supports

Info

Publication number
GB9719968D0
GB9719968D0 GBGB9719968.1A GB9719968A GB9719968D0 GB 9719968 D0 GB9719968 D0 GB 9719968D0 GB 9719968 A GB9719968 A GB 9719968A GB 9719968 D0 GB9719968 D0 GB 9719968D0
Authority
GB
United Kingdom
Prior art keywords
relating
roof supports
roof
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.)
Withdrawn
Application number
GBGB9719968.1A
Other versions
GB2329429A (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.)
JOY MINING MACHINERY Ltd
Original Assignee
JOY MINING MACHINERY 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 JOY MINING MACHINERY Ltd filed Critical JOY MINING MACHINERY Ltd
Priority to GB9719968A priority Critical patent/GB2329429A/en
Publication of GB9719968D0 publication Critical patent/GB9719968D0/en
Priority to ZA988351A priority patent/ZA988351B/en
Priority to DE19842460A priority patent/DE19842460A1/en
Priority to AU86086/98A priority patent/AU8608698A/en
Publication of GB2329429A publication Critical patent/GB2329429A/en
Withdrawn legal-status Critical Current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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • 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
    • E21D23/16—Hydraulic or pneumatic features, e.g. circuits, arrangement or adaptation of valves, setting or retracting devices
    • E21D23/26—Hydraulic or pneumatic control

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Fluid-Pressure Circuits (AREA)
GB9719968A 1997-09-20 1997-09-20 Improvements in and relating to roof supports Withdrawn GB2329429A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9719968A GB2329429A (en) 1997-09-20 1997-09-20 Improvements in and relating to roof supports
ZA988351A ZA988351B (en) 1997-09-20 1998-09-11 Roof supports
DE19842460A DE19842460A1 (en) 1997-09-20 1998-09-16 Roof support arrangement
AU86086/98A AU8608698A (en) 1997-09-20 1998-09-18 Improvements in and relating to roof supports

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9719968A GB2329429A (en) 1997-09-20 1997-09-20 Improvements in and relating to roof supports

Publications (2)

Publication Number Publication Date
GB9719968D0 true GB9719968D0 (en) 1997-11-19
GB2329429A GB2329429A (en) 1999-03-24

Family

ID=10819345

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9719968A Withdrawn GB2329429A (en) 1997-09-20 1997-09-20 Improvements in and relating to roof supports

Country Status (4)

Country Link
AU (1) AU8608698A (en)
DE (1) DE19842460A1 (en)
GB (1) GB2329429A (en)
ZA (1) ZA988351B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8876218B2 (en) * 2009-07-16 2014-11-04 Tiefenbach Control Systems Gmbh Hydraulic circuit for longwall support
WO2011006461A2 (en) * 2009-07-16 2011-01-20 Tiefenbach Control Systems Gmbh Hydraulic circuit for longwall mining
PL2378060T3 (en) * 2010-04-16 2013-05-31 S A Armstrong Ltd Improvements in and Relating to Long Wall Hydraulic Supply Systems

Also Published As

Publication number Publication date
ZA988351B (en) 1999-03-15
DE19842460A1 (en) 1999-03-25
AU8608698A (en) 1999-04-01
GB2329429A (en) 1999-03-24

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)