longwall mining

常見例句

雙語例句

• This is the beginning of longwall mining.
  這是長壁開采的開始。
• Analyses the factor that effect on the percentage of recovery in longwall mining with caving coal face, approaches the access to raise the percentage of recovery.
  分析了影響綜采放頂煤回收率的因素，探討了提高回采率的途徑。
• Based on the model of mechanics, some functional formulae of strata and surface movement above longwall mining goaf are derived by using the displacement method of theory of elasticity.
  本文在力學模型的基礎上，利用彈性理論的位移函數(shù)法導出了長壁采煤法采空區(qū)上方巖層及地表移動的函數(shù)表達式，同時給出了巖層及地表最大移動值的計算公式。
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