演马庄矿27112上回风联络巷掘进至接近27131回采工作面（下段）采空区时，巷道围岩破碎，裂隙明显，27131回采工作面（下段）采空区瓦斯通过裂隙涌至27112上回风联络巷，掘进工作面正前断面裂隙及炮眼瓦斯最大达到4%，巷道回风流瓦斯浓度达0.5%，给巷道的安全生产带来严重的威胁。为降低采空区瓦斯涌出，采用帷幕注浆封堵采空区裂隙、高位抽采巷帮截流的方法治理采空区瓦斯。%When Yanmazhuang Mine 27112 return air connection lane tunnels to near 27131 stope face(lower section) goaf, the roadwy surrounding rock is broken and the crack is apparent. 27131 stope face(lower section) goaf gas flocks into 27112 return air connection lane. The driving face front section fracture and hole gas is up to 4%, and the roadway return air gas concentration is 0.5%, bringing serious threat to roadway safety. In order to reduce goaf gas discharge, curtain grouting mined-out area fracture sealing, high extraction lane for intercepting method is adopted.
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