coal mining equipment costs

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    Coal mining 'robots' cut costs and risks but threaten . Engineers are developing a new generation of robotic mining equipment to cut the cost of extracting coal and to make more seams of the fuel economically viable as China tries to produce enough energy to power the world's second-largest economy..

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  • Coal mining - Wikipedia

    When coal seams are near the surface, it may be economical to extract the coal using open cut (also referred to as open cast, open pit, mountaintop removal or strip) mining methods. Open cast coal mining recovers a greater proportion of the coal deposit than underground methods, as more of the coal seams in the strata may be exploited. This equipment …

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