煤矿采动影响区瓦斯地面井抽采试验研究

针对寺河煤矿煤层瓦斯含量高、吸附能力强、瓦斯抽采利用技术相对薄弱等问题,提出工作面采动影响区瓦斯地面井抽采技术方案,并在寺河煤矿W2301工作面进行试验.地面井抽采期间,70d内累计抽采瓦斯约33.7万m3,平均抽采能力4m3/min,气体浓度约40％,工作面瓦斯浓度平均降低26.5％,工作面平均排风量降低至16.4m...

ExperImental Study on Gas Ground Well Pumping in Affected Area of Coal Mine

Aiming at the problems of high gas content,strong adsorption capacity and relatively weak gas drainage and utilization technology in Sihe Coal Mine,this paper puts forward the gas surface well drainage technology scheme in the mining affected area of working face,and carries out the test in w2301 working face of Sihe Coal Mine.During the surface well drainage period,the cumulative gas drainage within 70 days is about 337 000 m~3,the average drainage capacity is 4 m~3/min,the gas concentration is about 40%,the average gas concentration of the working face is reduced by 26.5%,the average exhaust air volume of the working face is reduced to less than 16.4 m~3/min,and the gas concentration of the working face does not exceed the limit.