新维煤矿自然发火分级预警技术

韩晓极

新维煤矿自然发火分级预警技术

韩晓极

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出版历程
- 发布日期: 2021-10-19

Classification and early warning technology of spontaneous combustion in Xinwei Coal Mine

HAN Xiaoji

摘要

摘要: 针对新维煤矿近距离煤层群开采过程中自然发火防治难题，以3^#煤层3102工作面为例，通过室内实验与现场实践形结合的方式开展采空区自然发火分级预警技术研究。煤氧化程序升温实验结果表明，3^#煤层在O2体积分数10%条件下，自燃氧化开始受到抑制；O₂体积分数7%条件下抑制作用更加明显；煤自然氧化过程呈现明显的阶段CO产气特征，并以此为依据将采空区自然发火预警划分为四级预警，对应煤自然发火的缓慢氧化（24×10^-6~200×10^-6）、加速氧化（200×10^-6~500×10^-6）、剧烈氧化（500×10^-6~4 000×10^-6）以及燃烧（＞4000×10^-6）等4个阶段。基于经济治灾的基本原则，根据不同预警级别动态调整自然发火防治方案，成功处置工作面回采过程中的自燃隐患，保障了矿井的安全回采。
- 近距离煤层群 /
- 氧化升温 /
- 自然发火 /
- 分级预警 /
- 防治技术
Abstract: Aiming at the prevention problem of spontaneous combustion during the mining of close coal seam groups in Xinwei Coal Mine, taking 3102 working face of the first mining of 3^# coal seam as an example, the research on the grading early warning technology of spontaneous combustion in the goaf was carried out through the combination of indoor experiment and field practice. The results of the coal oxidation temperature programming show that the spontaneous combustion and oxidation of the 3^#coal seam is inhibited under the condition of 10% oxygen concentration; the inhibitory effect is more obvious under the condition of 7% oxygen concentration; the natural coal oxidation process presents obvious phase CO gas production characteristics. Based on this, the spontaneous combustion warning in the goaf is divided into four warning levels, corresponding to the slow oxidation （24×10^-6-200×10^-6）, accelerated oxidation （200×10^-6-500×10^-6）, violent oxidation （500×10^-6-4 000×10^-6） and combustion （>4 000×10^-6） in four stages. In line with the basic principles of economic disaster control, the spontaneous fire prevention plan is dynamically adjusted according to different warning levels, and the hidden danger of spontaneous combustion in the mining process of the working face has been successfully dealt with to ensure the safe mining of the mine.
- close coal seam group /
- oxidation temperature rise /
- spontaneous combustion /
- hierarchical warning /
- prevention technology

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参考文献(15)

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