英语词汇“block caving”的英英意思、用法、释义、翻译、读音、例句、短语、词组-英语词典

单词	block caving
释义	block caving block caving [′bläk ‚kāv·iŋ] (mining engineering) A method of caving where a block, 150-250 feet (46-77 meters) on a side and several hundred feet high, is induced to cave in after it is undercut; the broken ore is drawn off at a bell-shaped draw point.
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