“顾亭林庵中,有忠烈公祠,近岁忽地裂数尺,中有风涛声,以物探之,应手火起,至今尚燃”。这是宋代鲁应龙记载的湖南嘉禾煤矿发现煤矿瓦斯的经历。可见自采煤业始,人们就知道煤层中有可燃性气体。矿井中的可燃气常造成灾难性的事故,以四川天府煤矿为例,1950—1982年,煤矿瓦斯突出的事故达119次。因此煤矿瓦斯,历年来一直是危害煤矿安全生产的大敌。近十年来,人们发现天然气也会有采尽之时。据1993年,世界天然气的探明储量(138万亿立方米)及开采量计算,全世界的天然气只能维持57年。有的国家,如美国只能开采8年。计算天然气寿命的通用 “Gu Tinglin nunnery, there are loyalty martyred ancestral temple, in recent years, suddenly cracked a few feet, there is wind and waves, to geophysical, should start fire, still burning ”. This is the record of the Song Dynasty Lu Yinglong Hunan Jiahe coal mine found coal gas experience. It can be seen from the beginning of coal mining, people knew there was flammable gas in the coal seam. The combustible gas in mines often leads to catastrophic accidents. Taking Tianfu coal mine in Sichuan Province as an example, from 1950 to 1982, there were 119 accidents with gas outbursts in coal mines. Therefore, coal mine gas has been the enemy that has endangered coal mine safety production over the years. In the past decade, people have found that natural gas will be available. According to the world’s proven reserves of natural gas (138 trillion cubic meters) and the amount of extraction in 1993, the world’s natural gas can only last 57 years. Some countries, such as the United States, can only mine for eight years. General calculation of the life of natural gas