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二氧化碳是无色,略带酸臭味和略有毒性的气体,对眼睛、喉咙及鼻的粘膜有刺激作用,在新鲜的空气中,二氧化碳浓度为0.04%,而在煤矿井下的每一个地点,特别是通风不良的采、掘工作面和盲巷内,二氧化碳的浓度要高出新鲜空气中浓度的几倍、几十倍、甚至几百倍。如发生二氧化碳和岩粉突出,二氧化碳浓度能达上千倍。因此,在煤矿生产中,因二氧化碳窒息、死亡的事故较多。在通风防尘工作比较好的统配煤矿,因二氧化碳窒息死亡的事故近些年来显著下降。而在我国的六万多处乡镇煤矿(包括村办、个体办
Carbon dioxide is a colorless, slightly sour and slightly toxic gas that irritates the mucous membranes of the eyes, throat and nose. In fresh air, the carbon dioxide concentration is 0.04%. At every point in the coal mine, Especially in poorly ventilated mining, digging face and blind alley, the concentration of carbon dioxide to several times higher than the concentration of fresh air, several times, or even hundreds of times. In the event of carbon dioxide and rock powder prominent, the carbon dioxide concentration can reach thousands of times. Therefore, in the coal mine production, due to carbon dioxide suffocation, the death of more accidents. In ventilation and dust-proof work of the well-equipped coal mines, the death toll from carbon dioxide has dropped significantly in recent years. In our country more than 60,000 township coal mines (including the village office, individual run