dirt seam 中文意思是什麼

dirt seam 解釋
劣質煤層
  • dirt : n 1 污物；爛泥；油垢；灰塵。2 泥土；土地；【礦物】含金土。3 毫無價值的東西。4 骯臟，下賤，卑鄙。5...
  • seam : n 1 縫；線縫。2 介面；接縫；接合處；接合線。3 裂縫。4 （臉上的）皺紋。5 傷痕。6 【造船】（船板間...
  1. Sub - level caving mining with seam of thickness dirt band

    含厚夾矸煤層的綜放開采
  2. The in - situ measurement and analysis of support resistance and top - coal movement in fully - mechanized top - coal caving face of a thick coal seam with dirt band had been carried out in some coal mine, the strata behavior and movement law of top - coal were revealed

    摘要對某煤礦含夾矸煤層綜放面的支架工作阻力和頂煤移動進行了現場觀測和分析，揭示了其礦壓顯現和頂煤運移的規律。
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