Comprehensive Gas Drainage Technology Applied to Zhuzhuang Mine

In order to effectively solve the problem of gas content over the limits in Ⅲ4414 fully mechanized coal mining face of Zhuzhuang Mine,the paper provided the combined gas drainage method with the tubing buried in the top corner of the goaf and the high level borehole drainage along the roof strike of the coal mining face for gas drainage.With the analysis of the drainage tubing buried location and the height distribution range in the cracking zone in the goaf,the optimized drainage tubing buried location and the borehole terminal location were settled.The gas drainage results showed that this technology could be efficiently to reduce the gas emission from the Ⅲ4414 fully mechanized coal mining face and to solve the long term gas content over the limits in the top corner of the coal mining face.During the production peat of the coal mining face,the gas volume fraction of the top corner could always be kept around 0.4% and the safety mining of the coal mining face could be ensured.