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首页> 外文期刊>Combustion Science and Technology >Study of CO Sources and Early-warning Concentration of Spontaneous Combustion at Air Return Corner in Fully Mechanized Mining Faces
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Study of CO Sources and Early-warning Concentration of Spontaneous Combustion at Air Return Corner in Fully Mechanized Mining Faces

机译：综合机械化露面空气返回角在空气返回角下的CO来源及早期警告浓度研究

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摘要

It is imperative to have an in-depth understanding of CO overrun at the air return corner not only for pre-warning concentrations of safety and spontaneous combustion but also for providing scientific guidance for the CO management. In this study, CO sources and early-warning concentration of spontaneous combustion at the air return corner in fully mechanized mining faces were investigated. Through field measurements, the main sources responsible for CO occurring at the air return corner of the fully mechanized mining face were determined and analyzed, and the basic parameters of mining and ventilation conditions were obtained from the field trials. In the laboratory, an enclosed reactor was introduced and a series of simulated experiments of coal oxidation was carried out to explore coal oxidation at ambient temperature; simultaneously, the temperature-programmed oxidation experiments were also carried out to determine the critical temperature of coal spontaneous combustion and to obtain the rate of CO production at a critical temperature. According to the analysis of the CO source and the production mechanism in the working face as well as both the distribution and migration rules of CO concentration in goaf and working face, a mathematical prediction model of the CO concentration at the air return corner of the working face under normal operation was established. And then the prediction of CO safety and spontaneous combustion early-warning concentrations were calculated based on the CO production rates of coal oxidation under ambient temperature and at a critical temperature. Moreover, a detailed operational process for the practical applications of the mathematical prediction model to the return corner of other fully mechanized mining faces was also proposed.
机译：必须对空中返回角进行深入了解，不仅用于预警浓度的安全和自发燃烧，还用于为CO管理提供科学指导。在本研究中，研究了在全机械化采矿面上的空气回波角处的CO来源和自发燃烧的早期警告浓度。通过现场测量，确定并分析负责在全机械化挖掘面的空气返回角处发生的CO的主要来源，并从现场试验中获得采矿和通风条件的基本参数。在实验室中，引入了封闭的反应器，并进行了一系列煤氧化实验，以探索环境温度下的煤氧化;同时，还进行了温度编程的氧化实验以确定煤自燃的临界温度，并在临界温度下获得CO生产的速率。根据对工作面的CO源和生产机制的分析以及GOF和工作面的CO集中的分布和迁移规则，在工作的空中返回角落的CO集中数学预测模型建立正常运行的面孔。然后根据环境温度和临界温度的煤氧化的CO生产率计算CO安全和自发燃烧预警浓度的预测。此外，还提出了用于数学预测模型的实际应用的详细操作方法，以对其他全机械化面孔的返回角进行的。

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  • 来源
    《Combustion Science and Technology》 |2021年第12期|1587-1604|共18页
  • 作者

    Wu Yuguo; Zhang Yulong; Zhou Chunshan; Wang Junfeng; Wu Jianming; Ren Ting;

  • 作者单位

    Taiyuan Univ Technol Coll Safety & Emergency Management Engn Taiyuan Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Safety & Emergency Management Engn Taiyuan Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Safety & Emergency Management Engn Taiyuan Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Safety & Emergency Management Engn Taiyuan Shanxi Peoples R China;

    Taiyuan Univ Technol Coll Safety & Emergency Management Engn Taiyuan Shanxi Peoples R China|Univ Wollongong Fac Engn & Informat Sci Sch Civil Min & Environm Engn Wollongong NSW Australia;

    Univ Wollongong Fac Engn & Informat Sci Sch Civil Min & Environm Engn Wollongong NSW Australia;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Coal; CO source; Spontaneous combustion; Safety concentration; Early-warning;

    机译：煤炭;CO来源;自发燃烧;安全集中;早期预警;

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