goaf

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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There are many factors influencing spontaneous combustion in goaf and their relative essentialities are different.

采空区自然发火的影响因素很多,各因素之间的相对重要性不同.

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The coal spontaneous combustion in the goaf is one of the main coal disasters.

采空区煤炭自燃火灾一直是我国煤矿的主要灾害之一.

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Gas wood road 413 of this mine is through the link - roadway caused by goaf gas discrarging.

该矿413机巷后路瓦斯超限是采空区瓦斯通过联络巷泄漏所致.

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The influence of different kinds of goaf air leaking to the spontaneous wall face is analysed.

分析了不同类型的采空区漏风对采空区自燃发火的影响.

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And above 90 % spontaneous combustion occurs in goaf.

其中90%以上自然发火发生在采空区.

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At present, many open - pit mine face serious threat of underground goaf in pit limit in china.

目前国内有不少露天矿山在生产过程中面临着境界内地下采空区的严重威胁.

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The paper first determined the range of Zhongjiashan goaf material - probe method and pit base investigation.

结合物探、坑底调查等方法对钟家山煤矿采煤区的现场勘察,确定采空区的范围.

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