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

block caving n. Mining a method of working a body of ore by marking out and undercutting it in sections, causing the ore to crumble and subside into the space beneath, from which it can be removed.

1898 Proc. 5th Ann. Meeting Lake Superior Mining Inst. Plate I (heading) (following p. 44) Plan showing drifts, crosscuts and raises preparatory to ‘block caving’ in Pewabic Mine.

1956 C. C. Popoff Information Circular No. 7758 (U.S. Dept. Interior) 6 The block-caving method of mining consists of dividing suitable ore bodies into blocks of predetermined size and undercutting each from the bottom and, when necessary, from the sides.

2011 Review (Rio Tinto) June 11/1 Block caving is the only method that can compete with the open pits in terms of productivity.

单词	block caving
释义	> as lemmas block caving block caving n. Mining a method of working a body of ore by marking out and undercutting it in sections, causing the ore to crumble and subside into the space beneath, from which it can be removed. Π 1898 Proc. 5th Ann. Meeting Lake Superior Mining Inst. Plate I (heading) (following p. 44) Plan showing drifts, crosscuts and raises preparatory to ‘block caving’ in Pewabic Mine. 1956 C. C. Popoff Information Circular No. 7758 (U.S. Dept. Interior) 6 The block-caving method of mining consists of dividing suitable ore bodies into blocks of predetermined size and undercutting each from the bottom and, when necessary, from the sides. 2011 Review (Rio Tinto) June 11/1 Block caving is the only method that can compete with the open pits in terms of productivity. extracted from blockn.¹ < as lemmas
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