BE449609A - - Google Patents

Info

Publication number
BE449609A
BE449609A BE449609DA BE449609A BE 449609 A BE449609 A BE 449609A BE 449609D A BE449609D A BE 449609DA BE 449609 A BE449609 A BE 449609A
Authority
BE
Belgium
Prior art keywords
coal
holes
pressure
cavities
desc
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE449609A publication Critical patent/BE449609A/fr

Links

Classifications

    • EFIXED CONSTRUCTIONS
    • E21EARTH OR ROCK DRILLING; MINING
    • E21CMINING OR QUARRYING
    • E21C41/00Methods of underground or surface mining; Layouts therefor
    • E21C41/16Methods of underground mining; Layouts therefor
    • E21C41/18Methods of underground mining; Layouts therefor for brown or hard coal

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Remote Sensing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Earth Drilling (AREA)
BE449609D BE449609A (enExample)

Publications (1)

Publication Number Publication Date
BE449609A true BE449609A (enExample)

Family

ID=104894

Family Applications (1)

Application Number Title Priority Date Filing Date
BE449609D BE449609A (enExample)

Country Status (1)

Country Link
BE (1) BE449609A (enExample)

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