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types of underground coal mines

The products includes five series: crusher, sand making machine, powder grinding mill, mineral processing equipment and building materials equipment.When it comes to mining coalthere are two processes by which coal can be removed from the ground: surface miningor underground mining. In Australiathe majority of coal mining is done via the opencast methodalthough often the method of choice is dependent on certain characteristics of the coal deposit 1.. The opencastalso referred to as the open-pit methodis the ideal technique when .

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