孙维丽, 杨贵儒, 黄 涛. 深孔断顶爆破导致的煤层CO气体涌出规律[J]. 煤矿安全, 2021, 52(4): 206-211.
    引用本文: 孙维丽, 杨贵儒, 黄 涛. 深孔断顶爆破导致的煤层CO气体涌出规律[J]. 煤矿安全, 2021, 52(4): 206-211.
    SUN Weili, YANG Guiru, HUANG Tao. CO gas emission law of coal seam caused by deep-hole broken roof blasting[J]. Safety in Coal Mines, 2021, 52(4): 206-211.
    Citation: SUN Weili, YANG Guiru, HUANG Tao. CO gas emission law of coal seam caused by deep-hole broken roof blasting[J]. Safety in Coal Mines, 2021, 52(4): 206-211.

    深孔断顶爆破导致的煤层CO气体涌出规律

    CO gas emission law of coal seam caused by deep-hole broken roof blasting

    • 摘要: 深孔断顶爆破是处理坚硬顶板冲击地压的有效方法,但爆破后产生大量高体积分数CO等有害气体,既严重影响了井下风流环境,也对开采容易自燃或自燃煤层矿井的内因火灾预测预报产生干扰。根据前人研究成果,通过理论计算、现场实测统计分析,发现深孔断顶爆破后,由爆破产生的CO气体中的75%将在1 h内排入工作面风流内并随风流排出;剩余的15%将积存或吸附于破裂的煤岩体内,并随瓦斯预抽在7~9 d内逐渐排出。

       

      Abstract: Deep-hole broken roof blasting is an effective method to deal with the rock burst of hard roof, but a large amount of harmful gases are generated after the blasting such as high concentration of CO, which not only seriously affects the downhole air current environment, but also interferes with the prediction of internal fires in coal mines. Based on previous research results, through theoretical calculations and statistical analysis on-site measurement, it is found that 75% of the CO gas generated by the blasting will be discharged into the airflow of the working surface within 1 h and discharged with the airflow after deep-hole broken-top blasting. The remaining 15% will be accumulated or adsorbed in the fractured coal rock body, and will be gradually discharged in 7-9 days with the gas pre-pumping.

       

    /

    返回文章
    返回