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Engineering practices for a safe, inert atmosphere in sealed areas of coal mines

机译:煤矿封闭区域中安全,惰性气氛的工程实践

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摘要

The 2008 Mine Safety and Health Administration Final Rule on Sealing of Abandoned Areas of Coal Mines focuses on seal design to resist explosion pressure. By designing sealed areas to become inert and remain permanently inert, it may be possible to use more economical 345-kPa (50-psi) seals under the new rule, if the required monitoring is met. Most sealed areas pass through the explosive range for methane in air within a few weeks after seal construction and then remain inert permanently, but data about the proportion of sealed-area atmospheres that are permanently inert and safe are lacking.
机译:2008年《煤矿安全与卫生总署关于废弃矿井封闭的最终规则》的重点是密封设计以抵抗爆炸压力。通过将密封区域设计为惰性并永久保持惰性,如果满足所需的监控要求,则可以根据新规则使用更经济的345 kPa(50 psi)密封。密封构造后的几周内,大多数密封区域都会穿过爆炸性范围的空气中的甲烷,然后永久保持惰性,但缺乏永久惰性和安全的密封区域大气比例的数据。

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