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一、瓦斯成因和赋存概况煤矿瓦斯多少年来一直威胁着煤矿安全生产。不少煤矿职工,死在瓦斯爆炸事故上。五十年代发明了从煤矿井下抽放瓦斯,大大减轻了矿井瓦斯爆炸事故。瓦斯的主要成份为CH_4,在树木成煤的变质过程中,分解出大量的瓦斯,经过漫长的地质年代,部分吸附在煤层中聚存在围岩中,我国矿井瓦斯来源都属这一类。随着地质构造的变动,聚入储气构造中,如唐山矿的顶板瓦斯,东濮的煤气田都属系这类。煤成气系即瓦斯的别名,即成煤时所产生的可燃气体,主要是CH_4,以别于油成气。近十几年来,美苏等国,都钻探出最大的煤成气田,超过
First, gas causes and occurrence Overview Coal mine gas has been threatening the safety of coal production for many years. Many coal miners died in a gas explosion accident. In the 1950s, the invention of gas drainage from underground coal mines greatly reduced the gas explosion accident in the mine. Methane is the main component of CH_4, metamorphism in the process of coal metamorphism, the decomposition of a large number of gas, after a long geological age, part of the adsorption in the coal seam in the surrounding rock, mine gas sources are of this category. With the changes in geological structure, the accumulation of gas and gas structures, such as the top gas of Tangshan Mine, Dongpu gas field belong to this category. Coal gas into the gas that is the alias, that coal-generated combustible gas, mainly CH_4, in addition to oil into gas. In the past decade or so, the United States and the Soviet Union and other countries have all drilled the largest coal-formed gas field over