Anchoring Technique Scheme During Old Roadway Renovation

By investigating the present situation of roadway surrounding rock, the paper determines the appropriate supporting principle, including medium support strength principle, pretightening force and pretightening force spread principle and timely support principle. Based on thick anchor board theory and bolted strata structure theory, the paper makes a reasonable effective anchor support scheme, the effect is really desirable. The result of mine pressure monitoring shows that old roadway has little deformation, which can keep stable in short-term, anchor cable and anchor bolt force is small, the anchor structure still has large bearing potential characteristics.