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矿井抽放瓦斯系统要求经常地检测抽出瓦斯的有关数据——浓度、流量、温度、发热量等,藉以掌握抽放系统的工作状态和满足利用瓦斯的要求。其中瓦斯浓度的检测最为重要。众所周知,4～16%的瓦斯和空气的混合气体具有爆炸性。因此,《煤矿安全生产试行规程》中有“……正常抽放的瓦斯浓度降到30%以下时,必须立即停止瓦斯泵运转……”的规定。当抽放瓦斯管路发生故障
Mine gas drainage system requires frequent detection of relevant data extracted gas - concentration, flow, temperature, heat, etc., in order to grasp the working status of the drainage system and meet the requirements of the use of gas. Gas concentration in which the most important test. As we all know, 4 ~ 16% of gas and air mixture is explosive. Therefore, “Provisional Regulations on Safety in Coal Mine Production” includes the provisions of “... the gas pump with normal drainage must be stopped immediately when its gas concentration drops below 30% ...”. When pumping gas pipeline failure