Research on the stability and supporting technology of the super-large section tunnel in Wangzhuang coal mine

By Wangzhuang coal mine for an example,the five destroying types of the super-large section roadway are analyzed based on the field observations and the rock drilling.In order to solve the damage of the super-large section roadway surrounding rock,according to the geological condition of Wangzhuang coal mine,the support technology program of the bolt-anchor and reinforced concrete and grouting was submitted.Through the industrial experiment and observation of the rock surface deformation,the support program can control the deformation of the super-large section roadway rock,and can guarantee the roadway normal using.