CMM is one of the most dangerous factors which affect mine safety.China has preliminarily set up a comprehensive gas control system which needs to be perfected both in content and form.

• 煤矿瓦斯是影响煤矿生产安全的最大危险因素之一,我国已经初步确立了煤矿瓦斯综合治理制度体系,但在形式和内容上均有待完善。