Sihe mine is endowed with rich coal bed methane resources. The concentration of recovered underground gas is high, and the gas can be utilized for many purposes.
晋城寺河煤矿煤层气资源丰富，井下抽采煤层气的浓度高，可作为多种用途。
When main ventilator of mine is switching, high outburst mines will appear over-limit phenomenon of gas concentration in short blowing-out time of switching ventilator.
进入栏目免费论文付费论文职称论文毕业论文转让论文论文指导外文翻译检测论文当矿井主通风机倒机时，在倒机的短暂停风时间内，高突矿井出现瓦斯超限现象。
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