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矿井火灾是井下重大的灾害之一。正确分析火区燃烧状态,对企业启封火区有重要的指导意义。通过火区气体运移规律,推导了氧气耗散方程,并可根据浓度变化计算出启封时间;归纳补充了4条燃烧状态判断准则,并进行了相关的实验验证。结果表明,判断准则较好的解释了矿井密闭火区燃烧状态,对安全启封火区密闭提供了很好的技术支持。
Mine fire is one of the major disasters underground. Proper analysis of the combustion status of the fire zone has important guiding significance for the business fire zone. Through the rule of gas migration in the fire zone, the oxygen dissipation equation is deduced, and the unsealing time can be calculated according to the concentration change. Four combustion state judgment criteria are supplemented, and the relevant experimental verification is carried out. The results show that the judgment criterion is better to explain the combustion state of the mine confined fire area and provides a good technical support for the safe sealing of the fire area.