Experimental comparison of ultrasonic properties of shaft lining concrete and surrounding rock in Xincheng Gold Mine

Abstract Based on the design of the wall rock and concrete lining of the new main shaft in Xincheng gold mine and the ultrasonic test as the main research method, the ultrasonic performance characteristics and influencing factors of the surrounding rock specimen and concrete specimen of the new main shaft are compared. It is concluded that the mechanical properties of rock specimens of metal mine surrounding rock are better than those of concrete lining. The complete surrounding rock segment of concrete lining does not play the role of rigid support. The two cube specimens have a significant influence on the attenuation of longitudinal wave. It is suggested to convert the cube specimen with a side length of 150mm into or directly use the cylinder specimen with a diameter of 50mm and a height of 100mm when determining the indoor ultrasonic parameters of rock and concrete in the shaft wall design of ultra-deep shafts of metal ore. The research results are of great significance to the design of shaft lining in mines.