Design of new testing equipment for sprayed concrete applied to the walls of underground mine galleries Abstract Rock falls cause many accidents in underground mines. Sprayed concrete is commonly used to shore up gallery walls, but its application is often uncontrolled and its properties difficult to evaluate. MSR Impact-echo seismic wave analysis technology is capable of non-destructively measuring the thickness, dynamic properties and failures of concrete layers more than 300 mm thick. The goal of this project is to adapt this sprayed-concrete testing technique for use with concrete layers 25 mm to 300 mm thick, and to develop a small, portable, commercial instrument for the mining sector requiring minimum intervention from users. This fast, accurate and practical method will help improve mine safety, and could also be used in the construction industry. Produced Under this Project Scientific Reports Design of a new testing device for layers of sprayed concrete on the walls of underground mine galleries Research Report: R-389 Scientific Publications Evalustion of Shotcrete Rock Support Systems in Underground Mines by a New Non-Instrusive TechniqueMomayez M., Hassani F. P., Guevremont P., O'Donnell D.Source : CIM Bulletin, Vol. 95, no 1063, 2002, p. 65-68Nondestructive Shotcrete Thickness Measurement in Underground MinesMomayez M., Guévremont P., Hassani F. P.Source : 9th ISRM International Congress (9th : August 25-28, 1999 : Paris, France), 1999, p. 1297-1302 Additional Information Type: Project Number: 0098-0180 Status: Completed Year of completion: 2004 Research Field: Mechanical and Physical Risk Prevention Team: Ferri P. Hassani (Université McGill)Moe Momayez (Université McGill)