And above 90 % spontaneous combustion occurs in goaf.
其中90%以上自然發火發生在采空區.
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The coal spontaneous combustion in the goaf is one of the main coal disasters.
采空區煤炭自燃火災一直是我國煤礦的主要災害之一.
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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層抽放 、 鄰近層抽放和采空區抽放.
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The influence of different kinds of goaf air leaking to the spontaneous wall face is analysed.
分析了不同類型的采空區漏風對采空區自燃發火的影響.
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Gas wood road 413 of this mine is through the link - roadway caused by goaf gas discrarging.
該礦413機巷后路瓦斯超限是采空區瓦斯通過聯絡巷泄漏所致.
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At present, many open - pit mine face serious threat of underground goaf in pit limit in china.
目前國內有不少露天礦山在生產過程中面臨著境界內地下采空區的嚴重威脅.
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The paper first determined the range of Zhongjiashan goaf material - probe method and pit base investigation.
結合物探、坑底調查等方法對鐘家山煤礦采煤區的現場勘察,確定采空區的范圍.
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There are many factors influencing spontaneous combustion in goaf and their relative essentialities are different.
采空區自然發火的影響因素很多,各因素之間的相對重要性不同.
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