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为了提高滴道盛和矿30~#工作面瓦斯抽采钻孔间距布置的合理性,优化抽采效果,以钻孔瓦斯自然涌出量为指标,在不同孔间距条件下开展钻孔瓦斯抽采有效半径的测试。结果表明:采用瓦斯流量法对该煤层钻孔瓦斯有效抽采半径进行测试是可行的,抽采60 d时,其有效抽采半径为2.84 m;抽采90~180 d时,有效抽采半径为3.22~3.89 m。
In order to improve the rationality of gas drainage hole spacing in 30 ~ # work face of Shengdao Mine in Daohua Dao and optimize drainage effect, the natural gas emission of borehole is taken as an indicator to carry out drilling gas drainage under different hole spacing Mining effective radius of the test. The results show that it is feasible to use the gas flow method to test the effective gas drainage radius of the coal seam borehole. The effective gas drainage radius is 2.84 m after 60 d of gas drainage and the effective gas drainage radius 3.22 ~ 3.89 m.