1) Sequential slice-caving
分次落矿
3) substoping and caving
分阶段崩落采矿
4) means of depth bore one off avalanche
深孔一次落矿全面法
5) ore extraction
落矿
1.
But due to fanshaped arrangement of blasting holes and uneven distribution of explosive,the technology often causes great ratio of lumpy ore thus resulting in low efficiency of ore extraction.
中深孔落矿是我国地下金属矿山应用较为普遍的落矿方法,但在应用时由于扇形布孔、炸药分布不均匀,爆破后易产生大块,影响出矿效率。
6) the conversion rate of second batch rock
二次矿分解率
补充资料：四分五落
1.形容分散零乱。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条