The ultralimit law of gas potency is summed up at No.301 face and other faces in No.1 Coal Mine.The origination of gas and causes of exceeding limit are analyzed.The harness measures are pointed.

• 总结了一号煤矿301及其它综采面上隅角瓦斯浓度超限规律,详细分析了瓦斯涌出的来源及超限原因,提出了极富针对性的治理措施。