煤矿煤层气排放对大气的污染及对策

在采煤过程中释放出大量烃类、二氧化碳、硫化氢等有毒有害气体。其中，以甲烷为主的烃类气体为成煤过程中生成，称为煤层气。甲烷是一种辐射和化学活性气体，会使对流层大气产生增温效应，作用比二氧化碳大20～60倍。煤炭开采排放的甲烷量为人类活动所排甲烷总量的10％，我国煤炭开采排放的煤层气约占世界煤炭开采排放煤层气总量的1／3，降低我国直接进入大气的煤层气量，对改善全球大气环境有重要的影响。

Pollution of Atomsphere by Coalbed Gas Emitted fromcoal Mines and the Coutermeasures

Large amount of toxic and harmful gases such as hydrocarbon, carbon dioxide, hydrogen sulphide, etc. will he released druing mining process. Hydrocarbon gases with methane as the key part formed druing the process of coal formation are called coalbed gas. As a radiative and chemically active gas,methane can increase the temperature in troposphere with a larger effect of 20-60 times over that of carbon dioxide. The volume of methane delivered for coal mining occupies 10% of total volume of methane delivered from human activities in the world. Since the coalbed methane emitted from coal mining in China amounts to 1/3 approximately of the total volume of coalbed methane emitted from world coal mining, it is important to decrease the volume of coalbed methane directly emitted into atomsphere in China for improving the globe atomsphere circumstances.