coal is mining by surface and underground ways

  • Mine railwayWikipedia

    A mine railway (or mine railroad U.S.) sometimes pit railway is a railway constructed to carry materials and workers in and out of a mine. Materials transported typically include ore coal and overburden (also called variously spoils waste slack culm and tilings all meaning waste rock). It is little remembered but the mix of heavy and bulky materials which had to be hauled into and

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  • Extraction and Processing of Minerals the Environmental

    There are several different ways minerals can be extracted from the earth but the two main methods are called surface mining and subsurface mining. Extracting Surface Minerals. Surface mining is

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