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针对在高瓦斯煤层回采过程中,煤与瓦斯突出综合检测指标经常超限、瓦斯抽采率低等问题,提出了在风巷施工高位钻孔的瓦斯抽采技术,阐述了瓦斯抽采技术的工艺流程和钻孔的布置参数。研究表明:在高瓦斯煤层回采过程中采用高位钻孔的抽采措施,可有效地解决瓦斯抽采率低的问题,降低了回风流中的瓦斯体积分数,提高了瓦斯抽采量和抽采率,减少了向工作面的瓦斯涌出量,保证了工作面的安全回采。
Aiming at the problems that gas and coal outburst indexes are often overrun and gas drainage rate is low during the process of high-gassy coal seam mining, a gas drainage technology with high drilling in air lane construction is proposed, and the gas drainage technology Process Flow and Drilling Layout Parameters. The results show that the adoption of high-level drilling in the recovery process of high-gassy coal seam can effectively solve the problem of low gas drainage rate, reduce the gas volume fraction in the return air flow and increase the gas drainage and drainage Rate, reducing the gas emission to the work surface, ensuring the safe mining face.