矿井煤体原生赋存一氧化碳气体来源试验研究

Experimental study on the source of primary fugitive carbon monoxide gas in coal bodies

由于近几年矿井采煤工作面回采时发生一氧化碳气体异常涌出现象,基于恒温充氮解吸装置,通过在采煤工作面利用隔氧取样方法采集煤样,在25℃条件下对煤层深部区域的煤样可解吸的一氧化碳气体总量进行测定,为减少在取样时一氧化碳气体发生氧化作用而造成误差,通过开展恒温氧化实验来校正,根据试验数据计算获得斜沟煤矿1号煤样和肖家洼煤矿2号煤样共计含原生一氧化碳气体至少为0.19 L/t和0.15 L/t,表明煤层在成煤过程中确实存在原生一氧化碳气体。

Due to the abnormal gush of carbon monoxide gas in the mining face in recent years,the total amount of carbon monoxide gas that can be desorbed from the coal sample in the deep area of the coal seam was measured by collecting coal samples at 25℃based on a thermostatic nitrogen-filled desorption device using the oxygen isolation sampling method at the coal mining face,and in order to reduce the error caused by the oxidation of carbon monoxide gas during the sampling,a constant temperature experiment was conducted to correct for this error,and the total amount of primary carbon monoxide gas in the No.1 and No.2 coal samples from the Xigou Mine and the Xiaojiawa Mine were calculated to be at least 0.19 L/t and 0.15 L/t,indicating that primary carbon monoxide gas existed in the coal seam during coal formation.