Retaining Roadway along Goaf at "Z"-shaped Fully Mechanized Coal Face

Retaining roadway along goaf was applied at No.3721 fully mechanized face in 2008,in Shuangyang Coal Mine,Shuangyashan Mining Industry Group Comp.The roadway was retained 540 m at the face,the reuse began after 6 M.From November 2007 to April 2008,the mine pressure of retaining roadways along gaaf at 3721 fully mechanized face was observed.The observation showed that the cross-section dimensions and support state in retained roadways were in full compliance with application requirements.