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Abstract : This paper describes a parametric study using discrete element modeling (DEM) of partial mining in a mountain terrain with in situ pillars for overburden support. For room and pillar mining or strip pillar mining, the accurate estimation of pillar stress is essential to ensure pillar stability and mine safety.
Since 2017, the Atlantic and Gulf regions of the United States have been pummeled by massive hurricanes Harvey, Irma, Maria, Florence, and Michael. According to the National Hurricane Center and others, economic losses from these five events could total between US$350 and $400 billion. Many of these losses were the result of damages to the power grid, which occurred because of collapsed structures and faulted lines.
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