煤炭工程 ›› 2013, Vol. 45 ›› Issue (11): 83-86.doi: 10.11799/ce201311028

• 研究探讨 • 上一篇    下一篇

采空区滞留干冰防治遗煤自燃现场试验研究

黄志安   

  1. 北京科技大学土木与环境工程学院
  • 收稿日期:2013-03-19 修回日期:2013-05-02 出版日期:2013-11-10 发布日期:2013-11-11
  • 通讯作者: 黄志安 E-mail:huang_za@qq.com

Field Experimental Research of Leaving Dry Ice in Goaf to Prevent Spontaneous Combustion of Residual Coal

  • Received:2013-03-19 Revised:2013-05-02 Online:2013-11-10 Published:2013-11-11

摘要:

在采空区遗煤自燃每年造成巨大经济损失和严重环境污染的情况下,二氧化碳在遗煤自燃防治方面应用的局限性却极大限制着其防灭火作用的充分发挥。针对这些问题,本文通过在石港煤矿的两个工作面开展采空区滞留干冰防止煤层自燃现场试验,分析了不同滞留干冰条件下二氧化碳在采空区的运移扩散情况和温度场变化规律,最终考察了采空区滞留干冰对遗煤自燃的防治效果。15108工作面一氧化碳含量由超50ppm迅速降至约20ppm并持稳, 其采空区内温度基本稳定在约19℃;15202工作面一氧化碳浓度降低并维持在约20ppm,其采空区内温度基本稳定在约21℃,这都表明采空区滞留干冰对遗煤自燃的防治效果明显。研究成果可进一步扩展煤自燃防治技术范围,为煤矿安全生产提供更大保障。

关键词: 采空区, 遗煤自燃, 干冰, 安全生产

Abstract:

Under the condition of spontaneous combustion of residual coal in goaf causing huge economic loss and heavy environmental pollution every year, limitation of application of carbon dioxide in preventing spontaneous combustion of residual coal greatly restrict the full exertion of its fire preventing effect. Against these problems, field experiment of leaving dry ice in goaf to prevent spontaneous combustion of coal seam was carried out in two mining faces of SHIGANG coal mine, and the mechanism of leaving dry ice in goaf to prevent spontaneous combustion of residual coal was verified, and then transferring and spreading situation of carbon dioxide in goaf and changing law of temperature field under different conditions of leaving dry ice were analyzed, and finally the effect of leaving dry ice in goaf to prevent spontaneous combustion of residual coal was studied. Concentration of carbon monoxide of 15108 mining face sharply decreased from over 50ppm to about 20ppm and kept stable, and temperature in its goaf basically sustained at about 19℃, in addition, concentration of carbon monoxide of 15202 mining face also decreased to about 20ppm and kept stable, and temperature in its goaf basically sustained at about 21℃, which all show that the effect of leaving dry ice in goaf to prevent spontaneous combustion of residual coal was evident. The research results can further expand range of preventing technologies against spontaneous combustion of coal and supply larger assurance for safe production of coal mines.

Key words: goaf, spontaneous combustion of residual coal, dry ice, safe production