Study on support technology in main inclined shaft at first mine of Chagannaoer

During construction process of mudstone in main inclined shaft in first mine of Chagannaoer,surrounding rock is crushing with fast expansion rate,which leads to difficulties in supporting.Composed support forms of steel tubular spport filled with concrete+metal mesh+strong tensile net+spray concrete was proposed after study.Through monitoring on-site,deformation data was got.After analysis,we got the supporting effect of the steel tubular support,which demonstrated that the bracket could control rock deformation effectively and keep the stability of the broken segment roadway.