回采工作面底板裂隙瓦斯防治技术研究

Study on prevention and control technology of cracked gas in floor of mining face

本文研究分析了龙滩矿井回采工作面底板岩层裂隙瓦斯的分布情况,合理设计了钻场及瓦斯抽采钻孔,将钻孔直接布置在富含裂隙瓦斯的区域,采取了主动抽采底板裂隙瓦斯的方法,在工作面回采前治理采空区底板裂隙瓦斯,从根本上解决了瓦斯涌出问题,实现了回采巷道底板裂隙瓦斯压力降至10 kPa以下,回采过程中工作面及回风流瓦斯浓度控制在1.0%以下,确保了矿井安全生产。

The distribution of fracture gas in the floor rock of the mining face of Longtan Mine was analyzed,the drilling and gas drainage holes were designed,and the drilling was arranged directly in the fissure gas area,with active drainage.The method of bottom wall fissure gas was to control the gas in the goaf before the working face was recovered,which fundamentally solved the gas emission problem and made the gas pressure of the crack in the mining roadway floor fall below 10 kPa in the recovery mining process.The wind gas concentration was controlled below 1.0%,which ensured the safe production of the mine.