露天采矿遵循与地下采矿相同的作业顺序：钻孔、爆破、装载并运走废料和矿石。
Open-pit mining follows the same sequence of oprations as underground mining: drilling, blasting, and loading and removing waste and ore.
露天采矿遵循与地下采矿相同的作业顺序：钻孔、爆破、装载并运走废料和矿石。
Open-pit mining follows the same sequence of operations as underground mining: drilling, blasting, and loading and removing waste and ore.
介绍了大孤山铁矿在矿石三期破碎系统的建设过程中，采用垂直深孔爆破技术挖掘破碎峒室，使挖掘工期大幅度缩短。
Dagushan's iron mine whose iron ore is in its third fragmentation system is in the construction process, in which the vertical deep-hole blasting technology was adopted to excavate the fragment room.
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