hole caving 中文意思是什麼
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Measures preventing a nd handling hole caving are given based upon analyzing various factors that infl uence hole wall stability including objective, technological, environmental and artificial factors
開挖期間進行了水平位移及沉降、深層位移、圈樑應力、水位及水量等項監測，對監測結果進行了分析，對監測發現的問題及時進行了處理，為基坑開挖提供了保障。 -
Practice and cognition of gas drainage hole construction along roof trend in fully mechanized caving coal face
綜放工作面頂板走向瓦斯抽放孔施工的實踐與認識 -
Application of bench caving with medium - length hole method in xinhua molybdenum mine
淘錫坑鎢礦廢水處理的試驗研究
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