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26 Aug 2010 There are more than 20 different underground coal mining methods in China almost exclusively longwall In general they Thin seams 0 4 to 1 3 m 1 3 to 4 3 ft thick For thin seams based on types of face equipment used especially the cutting machines three types of mining methods are practiced

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Components for underground use were among the first products of the company So it did not take long until Eickhoff coal mining machines were exported to all was the first Western supplier to be approved for mining equipment in China

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Crescent 39 s market analysis identified the underground coal mining industry in Australia as the most technically advanced market for mining gaseous coal in the world and Valley Longwall was the leading drilling manufacturer and contractor in this segment in Australia VLG had established a beachhead in the Chinese nbsp

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