你即將離開本站

並前往https://www.vuma3d.com/wp-content/uploads/2021/04/Effects-of-ventilation-leakage-in-deep-hot-room-and-pillar-operations.pdf

8th INTERNATIONAL MINE VENTILATION CONGRESS

Traditionally the deeper operations use breast [or updip] stoping with scraper winches served by raise-lines with back lengths up to 350 m and footwall ...

確定！ 回上一頁

查詢 「breast stoping」的人也找了：

  1. breast mining
    2.
  2. Shrinkage stoping
    3.
  3. gophering mining
    4.
  4. long hole open stoping mining method
    5.
  5. blast hole stoping method
    6.
  6. sublevel stoping vs sublevel caving
    7.
  7. square set stoping
    8.
  8. overhand stoping
    9.