建国以来,我国煤矿抽放瓦斯的工作获得了很大的发展。实践证明,抽放瓦斯是煤矿防治瓦斯危险的有效措施,也是控制高瓦斯回采工作面瓦斯涌出必不可少的方法之一。近几年来,随着机械化采煤的发展和产量的提高,瓦斯涌出量急剧上升。目前,虽然在抽放瓦斯技术、监视和控制瓦斯方面取得了一定的进展,但在开采瓦斯含量较大的煤层时,回采工作面的产量仍然受到瓦斯因素较大的限制。因此,如何进一步提高瓦斯抽放率,仍然是我们研究工作的一项重要课 Since the founding of the People’s Republic of China, great progress has been made in draining coal gas from coal mines in China. Practice has proved that gas drainage is an effective measure to prevent gas hazards in coal mines and is also one of the indispensable ways to control gas emission from high-gassy coal mining face. In recent years, with the development of mechanized mining and the increase of output, gas emission has risen sharply. At present, although some progress has been made in gas drainage, gas monitoring and control, the output of mining face is still greatly restricted by gas factors when mining coal seam with large gas content. Therefore, how to further improve the gas drainage rate is still an important part of our research work