| U+L型通风条件下采空区煤自燃危险区域研究 |
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| 引用本文： | 翟小伟,蒋上荣,王博. U+L型通风条件下采空区煤自燃危险区域研究[J]. 煤炭工程, 2020, 52(1): 100-105. DOI: 10.11799/ce202001021 |
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| 作者姓名： | 翟小伟 蒋上荣 王博 |
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| 作者单位： | 1. 西安科技大学;2. 西安科技大学雁塔校区安全科学与工程学院; |
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| 基金项目： | 陕西省重点研发计划项目 |
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| 摘 要： | U+L型工作面采空区漏风治理一直以来是矿井火灾防治的重要课题之一,为研究这一问题,采用绝热氧化升温试验、现场监测以及数值模拟的方法,在测定煤自燃极限特征参数的基础上,以陕西杭来湾煤矿实际为例对采空区“三带”区域分布规律进行研究,进而揭示采空区煤自燃特征及危险区域分布规律。研究发现：该采空区煤体自燃的下限氧浓度为12.9%|U+L型通风方式对于采空区“三带”区域划分有着较为严重的影响,进风侧采空区由于辅运巷漏风影响,会出现煤自燃“三带”范围的波动|数值模拟能够更加直观的体现煤自燃危险区域的分布特征。研究结果对于同类工作面的矿井火灾防治具有一定的指导和借鉴意义。
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| 关 键 词： | U+L工作面 煤自燃危险区域划分 下限氧浓度 数值模拟 |
| 收稿时间： | 2019-03-05 |
| 修稿时间： | 2019-04-23 |
Study on Risk Zone of Coal Spontaneous Combustion in Goaf under U+L Ventilation Conditions |
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| Abstract: | Air leakage control in goaf of U+L working face has always been one of the important topics of mine fire prevention and control. In order to study this problem, adiabatic oxidation temperature rise test, field monitoring and numerical simulation were adopted. Based on the determination of characteristic parameters of coal spontaneous combustion limit, the distribution law of "three zones" in goaf was studied by taking an actual mine in Shaanxi Province as an example, and further revealed. Characteristics and danger of spontaneous combustion in goaf. It is found that the lower limit oxygen concentration of spontaneous combustion of coal in the goaf is 12.9%. U+L ventilation mode has a serious impact on the division of "three zones" in the goaf. The fluctuation of "three zones" in the goaf on the intake side will occur due to the influence of air leakage in the auxiliary haulage roadway. The numerical simulation can more intuitively reflect the distribution characteristics of the dangerous zones. The research results have certain guidance and reference significance for mine fire prevention in the same kind of working face. |
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