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首页> 外文期刊>Journal of Mines, Metals & Fuels >Experimental partition and numerical simulated 'three-zone' of spontaneous combustion in the gob
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Experimental partition and numerical simulated 'three-zone' of spontaneous combustion in the gob

机译：GOB中自发燃烧的实验分区和数值模拟“三区”

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Based on the mechanism of spontaneous combustion of coal, the theory of gas drainage and the theory of three zones of spontaneous combustion, the application and research status are summarized at home and abroad. The preliminary understanding of gas drainage and spontaneous combustion in gob is expounded. And research status and the source of subject of spontaneous combustion and gas drainage in gob in domestic and foreign on influence of spontaneous combustion is introduced in detailed. The application study of spontaneous combustion of abandoned coal in gob of numerical simulation is mainly studied. The research background that is based on 5242Z working face in gob in Ivjiatuo coal of Kailuan group, it introduces duct monitoring system that is established in 12# coal seam of 5242Z working face. Beam tube monitoring is the main method in the experiment.Through the beam tube are arranged reasonable in gob, the gas bladder with regular sampling was analyzed by gas chromatography. It has achieved continuous monitoring to spontaneous combustion in gob and has measured the distribution situation of oxygen concentration of different locations inside the gob. To measure the "three zones" division of spontaneous combustion more accurate, by setting the parameters under the same conditions, the COMSOL numerical simulation software is used to solve the mathematical model of oxygen concentration and the field distribution of oxygen concentration in mined out area can be obtained. According to the simulated results, the range of three spontaneous combustion zones in goaf is determined, and the accuracy of the division of "three zones " is ensured. According to the oxygen concentration index, the result is that the heat dissipation zone is mainly distributed in the coal wall 0～15m area from the working face, the spontaneous combustion zone is mainly distributed in the coal wall 15～45m area from the working face and the suffocation zone is mainly distributed in gob outside the coal wall 45m of the working face, which provides a reference for the formulation of the technical scheme for mine fire prevention and control in the later period. The comparison between the measured and simulated the actual results of the monitoring of the beam pipe in the mined out area shows that the actual measurement coordinate points essentially coincide with the contour lines that are processed by simulation results. There is little difference in the division of "three zones " of spontaneous combustion in gob to monitoring results and simulation calculation results of beam and tube in mined out area. Therefore, the validity of the numerical simulation is verified.
机译：基于煤炭自燃机理，气体排水理论与三区的自发燃烧理论，应用和研究现状在国内外总结。阐述了对GOB中气体排水和自发燃烧的初步理解。详细介绍了在国内外燃烧影响的GOB中自发燃烧和气体排水的研究现状和研究状态和源泉。主要研究了数值模拟中垃圾煤炭自燃煤的应用研究。基于Kaiuan集团Ivjiatuo煤的GOB中的5242Z工作面的研究背景引入了在5242Z工作面12＃煤层中建立的管道监测系统。光束管监测是实验中的主要方法。通过气相色谱分析具有规则采样的气体膀胱在GOB中合理地布置的光束管。它已经达到了GOB中的自燃燃烧，并测量了GOB内不同位置的氧浓度的分布情况。为了测量自发燃烧的“三个区域”划分更准确，通过在相同条件下设置参数，COMSOL数值模拟软件用于解决氧气浓度的数学模型和氧气浓度的场地分布可以获得。根据模拟结果，确定了三个自发燃烧区的范围，确保了“三区”的划分的准确性。根据氧气浓度指数，结果是散热区主要从工作面分布在煤壁0〜15m面积中，自发燃烧区主要分布在煤墙15〜45m面积中，从工作面上分布窒息区主要分布在工作面45m的煤壁45m外的GOB中，这为在后期的矿矿防火和控制技术方案提供了参考。测量和模拟之间的比较射出区域中梁管监测的实际结果表明，实际测量坐标点基本上与通过模拟结果处理的轮廓线重合。 GOB中的“三个区域”的分裂差异几乎没有差异，以监测射出区域梁和管的结果和仿真计算结果。因此，验证了数值模拟的有效性。

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