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There are two main methods of underground mining: room-and-pillar (‘bord’- and-pillar) and longwall mining.With the roomand- pillar approach …

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The ore deposit is deep Ore body is steep Grade is high enough to cover costs Some types of underground mining Room and Pillar Cut and Fill Long wall (coal …

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Mining Methods Author: penny Last modified by: Penny … Document presentation format: On-screen Show Company … Slide 22 Some types of underground mining Room and Pillar …

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of mining methods. While opencast operations are now fully mechanized employing large capacity earth moving equipment, introduction of machinery in underground workings has

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MINING METHODS Ppt Presentation – A PowerPoint presentation … Slide 2: Coal is mined by two main methods : Underground or ‘deep’ mining Surface or ‘open-cut …

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