GB1251954A - - Google Patents

Info

Publication number
GB1251954A
GB1251954A GB1251954DA GB1251954A GB 1251954 A GB1251954 A GB 1251954A GB 1251954D A GB1251954D A GB 1251954DA GB 1251954 A GB1251954 A GB 1251954A
Authority
GB
United Kingdom
Prior art keywords
supports
skids
jacks
ripping
mine
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
Other languages
English (en)
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 filed Critical
Publication of GB1251954A publication Critical patent/GB1251954A/en
Expired legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Environmental & Geological Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
GB1251954D 1967-12-12 1967-12-12 Expired GB1251954A (https=)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB547871 1967-12-12

Publications (1)

Publication Number Publication Date
GB1251954A true GB1251954A (https=) 1971-11-03

Family

ID=9796960

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1251954D Expired GB1251954A (https=) 1967-12-12 1967-12-12

Country Status (1)

Country Link
GB (1) GB1251954A (https=)

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Legal Events

Date Code Title Description
PS Patent sealed
PLE Entries relating assignments, transmissions, licences in the register of patents
PLNP Patent lapsed through nonpayment of renewal fees