深部地区保护层开采期间卸压瓦斯抽采技术探索与实践

Exploration and practice of pressure relief gas drainage technology during mining of protective layer in deep area

随着峰峰矿区的生产地区逐步向深部延伸,深部地区煤层具有瓦斯压力高、含量大等特点,采取工作面单侧的卸压瓦斯抽采技术已经不能解决深部地区的瓦斯治理问题。此次研究主要是采用在保护层工作面两巷施工网格式走向穿层长钻孔抽采卸压瓦斯的技术,解决保护层开采期间工作面瓦斯超限问题,同时也通过对卸压瓦斯的抽采,解决被保护层的煤与瓦斯突出问题,最大限度地降低被保护层的吨煤瓦斯含量,保证被保护层开采期间的安全。

With the mining area of the Fengfeng mining area gradually deeper, the coal seam in the deep area with the characteristics of high gas pressure and high content, the unilateral pressure relief gas drainage technology on the working side could not solve the gas control problem in the deep area. The research mainly used the technology of moving through the long-hole drilling and unloading gas in the construction of the two working roadway of the protective layer working surface to solve the problem of gas overrun in the working face during the mining of the protective layer, and also through the gas pressure relief. The technology solved the problem of coal and gas outburst and minimized the gas content of the coal in the protected layer, and ensured the safety during the mining of the protected layer.