为了安全有效地防治回采工作面上隅角瓦斯超限,根据多年实践经验,对几种常用的防治回采工作面上隅角瓦斯超限方法的原理及具体实施过程的进行了详细介绍,阐述了使用这些方法应注意的问题。实践表明:每一种方法都有其特定的使用条件,不同矿井回采工作面上隅角瓦斯超限又有各自的具体特点,必须具体问题具体分析。 In order to safely and effectively prevent gas overhang on the upper corner of the coal mining face, based on years of practical experience, the principle and implementation process of several commonly used methods to prevent and control upper corner gas in coal mining face are introduced in detail Use these methods should pay attention to the problem. Practice shows that: Each method has its own specific conditions of use, different coal mine mining face corner gas over-limits have their own specific characteristics, the specific problems must be specifically analyzed.