In deep open-pit mine the gutter works for a new level is the emphasis and difficulty.The working schedule and quality are influenced by the blasting effect.

 
  • 深凹露天采场中,新水平掘沟工程是采矿生产的重点、难点,爆破效果的好坏又直接影响掘沟工程的进度和质量。
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