The method of gas drainagecoal seam gas drainage , near coal gas drainage , and goaf gas drainage.

瓦斯抽放的方法有本煤层抽放 、 邻近层抽放和采空区抽放.

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Essential way of solving the gas drainage problem of low permeability coal seam is seam permeability.

高瓦斯低透性煤层的瓦斯抽放,一直是煤矿安全生产过程中的重大技术难题.

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The mostly research of the thesis study the optimization and managements of the mines gas drainage.

本文的主要研究工作是矿井瓦斯抽放管网的优化管理技术.

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