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Underground mining (hard rock) Wikipedia
Underground hard rock mining refers to various underground mining techniques used to excavate hard minerals, usually those containing metals such as ore containing ...
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2002 Coal Operators'' Conference Tribute to Dr Ripu Daman Lama 60 68 February 2002 The AusIMM Illawarra Branch CURRENT INSEAM DRILLING TECHNIQUES
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The invention provides a method for dredging a drill hole for underground coal gasification. The drill hole comprises a sleeve used for supporting the wall of the hole and at least ...
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TOOLS TOUGH TOOLS FOR TOUGH JOBS Mining and Construction manufactures a range of specialized drilling consumables for use in underground coal
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Improvement of productivity has become an important goal for today''s coal industry in the race to increase price competitiveness. The challenge now lying ead for ...
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