longwall mining
常見例句
- 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(chǔ)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。 返回 longwall mining