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GB2069048B - Longwall jacks - Google Patents

Longwall jacks

Info

Publication number
GB2069048B
GB2069048B GB8100960A GB8100960A GB2069048B GB 2069048 B GB2069048 B GB 2069048B GB 8100960 A GB8100960 A GB 8100960A GB 8100960 A GB8100960 A GB 8100960A GB 2069048 B GB2069048 B GB 2069048B
Authority
GB
United Kingdom
Prior art keywords
longwall
jacks
longwall jacks
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
GB8100960A
Other versions
GB2069048A (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.)
Commercial Shearing Inc
Original Assignee
Commercial Shearing Inc
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 Commercial Shearing Inc filed Critical Commercial Shearing Inc
Publication of GB2069048A publication Critical patent/GB2069048A/en
Application granted granted Critical
Publication of GB2069048B publication Critical patent/GB2069048B/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D15/00—Props; Chocks, e.g. made of flexible containers filled with backfilling material
    • E21D15/14—Telescopic props
    • E21D15/44—Hydraulic, pneumatic, or hydraulic-pneumatic props

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Structural Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Actuator (AREA)
  • Pit Excavations, Shoring, Fill Or Stabilisation Of Slopes (AREA)
GB8100960A 1980-01-21 1981-01-13 Longwall jacks Expired GB2069048B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US11410880A 1980-01-21 1980-01-21

Publications (2)

Publication Number Publication Date
GB2069048A GB2069048A (en) 1981-08-19
GB2069048B true GB2069048B (en) 1984-06-06

Family

ID=22353397

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8100960A Expired GB2069048B (en) 1980-01-21 1981-01-13 Longwall jacks

Country Status (5)

Country Link
CA (1) CA1158226A (en)
DE (1) DE3101849A1 (en)
FR (1) FR2474112B1 (en)
GB (1) GB2069048B (en)
MX (1) MX152214A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104963706A (en) * 2015-07-10 2015-10-07 常州市龙润机械有限公司 Coal mine underground shoring device and shoring method

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB720361A (en) * 1952-11-22 1954-12-15 Gullick Ltd Improvements in or relating to hydraulic pit props, hydraulic jacks and the like
NL191038A (en) * 1953-09-24 1900-01-01
FR1280684A (en) * 1960-11-22 1962-01-08 Sagem hydraulic prop
FR1321725A (en) * 1961-04-20 1963-03-22 Bochumer Eisen Heintzmann Improvements to hydraulic props for mines
GB970917A (en) * 1962-11-20 1964-09-23 Hans Joe Rheinbay Hydraulic pit prop
GB1342741A (en) * 1970-01-24 1974-01-03
DE2022514C3 (en) * 1970-05-08 1974-02-07 Josef Haamann Hebe- Und Transporttechnik, 6982 Freudenberg Hydraulically operated jack

Also Published As

Publication number Publication date
FR2474112A1 (en) 1981-07-24
GB2069048A (en) 1981-08-19
MX152214A (en) 1985-06-10
FR2474112B1 (en) 1985-10-25
CA1158226A (en) 1983-12-06
DE3101849A1 (en) 1982-01-14

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Legal Events

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