Evolution of Longwall Mining and Control Systems in the United States
نویسنده
چکیده
th is paper addresses the evolut ion of longwal l mining in the United States from the initial "longwall" method, utilizing hand loading and manual haulage to the progress ive mechanizat ion of the face equipment . An analysis of accident information for specific benchmark dates in United States longwall evolution and a review of productivity (for the period of 1963 1973) are provided to demonstrate the impact of longwall mining advancements in these areas. It also addresses how the previous generation of machines and methods influenced the next, up to the present and addresses the introduction and advancements of automated control systems and the Mine Safety and Health Administrations safety concerns associated with them. Among the systems to be discussed are microprocessor controlled shearers and roof supports.
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