A New Measuring Device and its Application on Surface Deformation Measurement of Concrete Shaft Lining

Abstract

In light of the shortcomings present in the measuring devices of shaft lining surface deformation, a shaft lining surface deformation measuring device was proposed. With a protective cap to reduce the influence of external environment, the measuring device can reflect the deformation of shaft lining according to the tautness of a strain steel string. Featuring by its simple structure, operational convenience, and low cost as well, the device has been applied to the auxiliary shaft of Maiduoshan mine, Ningxia, China. The upper part of Maiduoshan auxiliary shaft had been constructed using mine tunneling method, before the bottom part of large water inflow section been constructed using freezing method. The deformation of the completed shaft lining was measured during the freezing method construction, to provide important references for technical personnel taking reasonable protective actions.