manway use in hard ore mining methods

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    Selective mining The object of selective mining is to obtain a relatively high-grade mine product; this usually entails the use of a much more expensive stoping system and high exploration and development costs in searching for and developing the separate bunches, stringers, lenses, and bands of ore.

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    Hard rock mining, placer mining, by-product mining and gold ore processing are some methods of gold mining. Each method has its unique process of accessing, extracting and processing gold. Hard rock mining is a method that involves the creation of underground tunnels or open pit mines to access gold ...

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    The two main methods of mining are surface mining and underground mining. Surface Mining . Surface mining is used to obtain mineral ores that are close to Earth's surface. The soil and rocks over the ore are removed by blasting. Typically, the remaining ore is drilled or blasted so that large machines can fill trucks with the broken rocks.

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    Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing gold, silver, iron, copper, zinc, nickel, tin and lead, but also involves using the same techniques for excavating ores of gems such as diamonds or rubies.