underground workings mined

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  Overview of converting abandoned coal mines to underground …

  20231220 · Abstract The utilization of Underground Pumped Storage Power Systems (UPSP) addresses the growing need for energy storage in the face of increasing intermittent energy sources. Simultaneously, the closure of mining activities has resulted in vast underground spaces potentially becoming available for alternative purposes. This paper …

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  Coal mining - Underground, Surface, & Drilling | Britannica

  202471 · Coal mining - Underground, Surface, & Drilling: The various methods of mining a coal seam can be classified under two headings, surface mining and underground mining. Surface and underground coal mining are broad activities that incorporate numerous variations in equipment and methods, and the choice of which method to use in extracting …

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  Mining through historic underground workings and systematic …

  This paper presents the systematic void management processes, analysis methods used to determine a safe working crown pillar thickness, and unique challenges faced while mining through historic underground workings. Keywords: void management, open pit mining, underground mining

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  Assessing the long-term evolution of mine water quality in …

  20221110 · This study assessed the robustness of empirical ‘first-flush’ models for representing mine water behavior in flooded underground workings in the Sydney Coalfield in Nova Scotia, Canada, before being employed, for the first time, to predict the evolution of mine water quality being pumped to an active mine water treatment plant.

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  The metals of antiquity – tin - MINING.COM

  2016101 · Figures Ventilation of underground workings mined by the combined method of mining of synclinal coal fields.

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  Review Article Coal mine methane: A review of capture and …

  201151 · Lunarzewski (1998) has also described gas emission into underground workings as a combination of the quantity of gas released from both the mined coal seam and adjacent strata.

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  (PDF) Potential Usage of Underground Mined …

  198911 · Concluding remarks Abandoned mine workings give rise to concern in view of the potential for later subsidence of the surface. In some cases there is uncertainty as to the existence of underground mine workings, or even as to the presence of significant voids within such workings.

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  Nova Scotia's Historic Underground Coal Mine Workings …

  4  · Approximately 400 million tonnes of coal have been mined in Nova Scotia′s surface and underground coal mines. Over the course of Nova Scotia′s coal mining history, the provincial government has retained administrative records and mine plans for most of the underground coal mines. In an effort to increase awareness of this information, the ...

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