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  Development of resource-saving technology for excavation …

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  Llay Main and Llay Hall collieries Wrexham - Welsh coal mines

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  Journal of Mining Institute

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  Geomagnetic effect of the strong 2011 Tohoku earthquake

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  Estimating methane emissions from coal mines - Global …

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  Sep 9, 2020 · Zimbabwe has banned mining in all its national parks, reversing a decision to let Chinese firms explore for coal at its famous Hwange game park.

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