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    The surface miner is a mobile milling machine with a mechanically driven cutting drum. On Wirtgen machinery the drum is located between two sets of individually height adjustable crawler tracks, and a two stage conveyor system used to directly load trucks.

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    The required range of a sensor used on an underground continuous mining machine is generally very short, and the distance measurement must be very accurate. Many underground mining machines run relatively slowly compared to surface haul trucks. Thus, the range of PWSs used in surface mining operations must be proportionally greater.

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    1. Underground Mining Methods Classification of Underground Mining Methods Mineral production in which all extracting operations are conducted beneath the ground surface is termed underground mining. Underground mining methods are usually employed when the depth of the deposit and/or the waste to ore ratio (stripping ratio) are

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    Mining Equipment of the late 1800s: Historical mining equipment used in the American West including the miner's candlestick, the miner's hat, the lunch bucket, and the ore bucket.

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