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Oxygen Distribution and Air Leakage Law in Gob of Working Face of U+L Ventilation System

机译：U + L通风系统工作面氧气分布和空气泄漏法

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摘要

In order to prevent and control coal spontaneous combustion effectively in the gob of U+L working face, the 30105 working face of Hanglaiwan mine was taken as the research object. The relationship models between oxygen concentration and burial depth of the two tunnels in the gob of U+L working face were established. The distribution of oxygen in the gob of the working face of U+L ventilation system was studied by field observation combined with numerical simulation. The results show that the air leakage in the gob is serious. There are a number of fluctuation areas where the oxygen concentration first decreases and then increases in the air intake side of the gob. The oxygen concentration peaked at 100m, 175m, and 245m, respectively, from the intake side of the gob. In the same position of the gob depth, the air leakage intensity on the intake side is generally higher than that on the return side, and the oxygen concentration on the intake side of the gob is slower than the return side. Oxygen concentration maintains at 5.09% when the depth of gob reaches 400m. Measures to prevent coal spontaneous combustion should be strengthened in the air intake side.
机译：为了防止和控制煤炭自燃，在U + L工作面上有效地，杭莱湾矿的30105个工作面被视为研究对象。建立了U + L工作面上的两个隧道的氧浓度和埋藏之间的关系模型。研究了U + L通风系统的工作面上的氧气的分布，通过现场观察与数值模拟结合使用。结果表明，GOB中的空气泄漏严重。存在许多波动区域，其中氧气浓度首先降低，然后在加速器的进气侧增加。氧气浓度分别从加入胶的进气侧达到100m，175m和245米。在GOB深度的相同位置，进气侧的漏气强度通常高于返回侧的漏气强度，并且伽皮的进气侧的氧浓度比返回侧慢。当血管深度达到400米时，氧气浓度保持在5.09％。在进气侧应加强防止煤自燃煤的措施。

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  • 来源
    《Mathematical Problems in Engineering》 |2019年第4期|8356701.1-8356701.10|共10页
  • 作者

    Zhai Xiaowei; Wang Bo; Jiang Shangrong; Zhang Weixia;

  • 作者单位

    Xian Univ Sci & Technol Coll Safety Sci & Engn Xian Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Safety Sci & Engn Xian Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Safety Sci & Engn Xian Shaanxi Peoples R China;

    Xian Univ Sci & Technol Coll Safety Sci & Engn Xian Shaanxi Peoples R China;

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