Research on the Deformation and Failure Law of Three Soft Strong Deformation Coal Seam Roadways in Sliding Structure Area
The 21051 lower roadway of the twoone coal in Gaocheng Coal Mine of Zhengzhou Coal and Power belongs to a typical"three soft"coal seam,with loose and fractured roadway surrounding rock and severe deformation of the roadway.To ensure construction safety,its deformation and changes law of the surrounding rock loose zone are studied.The average displacement amount of the two sides and roof and floor of the roadway surrounding rock reaches 600-950 mm with the highest displacement amount at the roof and floor,followed by the two sides,showing deformation around the roadway,belonging to a large deformation soft rock roadway;The range of the loose zone in the roadway surrounding rock is generally 4.3 m for the roof,3.0 m for the two sides,and 1.26 m for the floor,which belongs to a large loose zone.The roadway surrounding rock can be constructed using anchor rods and anchor cables.
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