针对赵庄煤矿1263工作面瓦斯涌出量大、上隅角瓦斯浓度高的问题,在12号煤层采用本煤层预抽、高位抽采及采空区埋管抽采相结合的综合瓦斯抽采方法,通过采用本煤层预抽,瓦斯抽采量较常规的布孔方式提高了0.46～1.02倍;高位钻孔抽采瓦斯后,邻近煤层的瓦斯相对涌出量由4.38～10.17 m3/t降为1.46～3.16 m3/t;采空区埋管抽采确保煤矿采空区的瓦斯体积分数保持在0.7%～0.9%,符合《煤矿安全规程》规定的瓦斯体积分数在1.0%以下。

According to the status of a high gas emission value and high gas content at the upper corner in No. 1263 coal mining face of Zhaozhuang Mine,a compr ehensive gas drainage method combined with gas pre-drainage in mining seam,gas drainage with high level borehole and pipeline buried in goaf was applied in No.12 s . eam.With the gas pre-drainage in mining seam,the gas drainage value increased by 0.46-1.02 times than conventional borehole layout.After gas drainage with high level borehole conducted,the gas relative emission value of the adjacent seams reduced from 4.38-10.17 m3/t to 1.46-3.16 m3/t.The gas drainage with pipeline buried in go af ensured the gas volume fraction in the mining goaf kept at 0.7%-0.9% and controlled the gas volume fraction below 1.0% stipulated in Mine Safety Regulations.