煤矿井下突出松软煤层钻进喷孔防治技术研究

发布时间：2018-05-19 13:54

  本文选题：喷孔 + 压风排粉　； 参考：《煤炭技术》2017年02期

【摘要】：在煤矿井下钻进过程中,喷孔事故一直是难以解决而又经常发生的问题。突出松软煤层钻进应使用压风排粉,排粉能力不足容易造成钻孔堵塞,使得瓦斯梯度升高,积聚的瓦斯会突破堵塞,造成喷孔事故。由风流在钻孔内部的各个阻力损失,求出钻进过程中排粉所需要的风压,分析钻孔倾角与钻屑运移的关系,利用合理的排粉参数能够顺利地排出钻屑,减少喷孔事故的发生。
[Abstract]:In the process of underground drilling in coal mine, hole injection accident is always difficult to solve and often occurs. In the drilling of outburst soft coal seam, the pressure air should be used to drain the powder, which can easily lead to the borehole blockage, which makes the gas gradient rise, and the accumulated gas will break through the blockage, resulting in the accident of jetting hole. According to the loss of resistance of air flow inside the borehole, the air pressure needed to discharge powder during drilling is calculated, and the relationship between drilling inclination angle and cuttings migration is analyzed, and the drilling chip can be discharged smoothly by using reasonable discharge parameters, and the occurrence of blowout accident can be reduced.
【作者单位】： 河南理工大学安全科学与工程学院;河南省瓦斯地质与瓦斯治理重点实验室-省部共建国家重点实验室培育基地;
【分类号】：TD713.3
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本文编号：1910361