Discussion on Deformation Monitoring Scheme of Goaf in Yuzhou

Deformation monitoring of canal reach in goaf is one of the important technical problems for Middle route South-to-North water transfer project,this paper introduces deformation monitoring scheme of goaf in Yuzhou,describes the monitoring of horizontal displacement and vertical displacement,principle and requirement of layout of deformation monitoring network within the rock mass,typomorphic characteristics and burying measures of reference points and monitoring points.Technical requirements for different stages were considered,which could meet the requirements of long-term observation.