Experimental study on waveguide features of resin anchoring mass

in order to improve the reliabity of the resin bolt nondestructive testing,from a view of the waveguide features of the anchoring mass a study was conducted with a numercal simulation and experiment study combined method.With the establishment on the numerical model ofthe anchoring system,the paper analyzed the transmitting process ofthe stress wave on the end anchored bol.The nondestructive testing insfrument of the boft was researched and developed,the similar experiment model of the resin anchoring mass was established and waveguide features of bolt under uncompacted condition of end bolt and anchoring were tested and analyzed.The results showed that during the transmitting process of stress wave on resin anchoring mass,a certain periodic law would be occurred .There was a similar linear relationship between the wave velocity at the anchoring section and the anchoring density, According to the waveguide features,the bot characteristic length and the anchoring agent density could be inversely calculated.