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虽然工作面瓦斯的来源不同,但抽放瓦斯是防治瓦斯灾害的治本措施,它是降低煤炭瓦斯含量的有效措施。低透气性煤层工作面预抽难以达到理想的瓦斯抽放效果,采用工作面边采边抽、高位钻孔、上隅角埋抽放管等综合技术,分源抽采工作面卸压瓦斯、顶板裂隙带瓦斯和采空区瓦斯,瓦斯抽放效果显著,具有一定的推广价值。介绍了对低透性煤层进行增大透气性后,通过采取以上瓦斯抽放技术,降低了煤井的瓦斯含量,保证了矿井的安全生产。
Although the sources of gas in workface are different, gas drainage is a fundamental measure to prevent gas disasters. It is an effective measure to reduce the gas content in coal. Low gas permeability coal seam face pre-pumping difficult to achieve the desired gas drainage effect, the use of face mining edge mining, high drilling, buried pipe on the corner of the integrated technology, source mining face relief gas, Roof fissure zone gas and goaf gas, gas drainage effect is significant, with some promotional value. After introducing the increase of permeability to the low permeability coal seam, by adopting the above gas drainage technology, the gas content of the coal mine is reduced and the mine safety production is ensured.