Abstract: This research is conducted in order to analyze damage mechanism and bearing mode of resin bolt anchoring section of bolt support structure in floor railway under the dynamic pressure in mining, and to improve the reliability of resin bolting in coal mine field applications. First, the mine-induced stress of floor railway is simulated by UDEC while the overlying seam is mining, and the reaction of roof bolt and side bolt support structure is analyzed. Then, the bearing and deformation of resin bolt anchoring section are simulated by FLAC, and the dynamic response of resin bolt under certain load and confining pressure is obtained. Finally, surrounding rock with concrete block is simulated, and bolt pullout test is carried out in the prepared hole in which resin bolt have been anchored, at the same time elastic wave test instrument is used to do nondestructive test for the bolt. The test result shows that 1) the process of resin bolt anchoring damage is gradual, 2) the gradual failure and the effective anchoring length can be detected by elastic wave nondestructive test, and that 3) the real-time bearing capacity of the bolt can be deduced, so as to improve the timeliness of resin bolting in coal mine field applications.

Key words: resin bolt, anchorage body injury, elastic wave, nondestructive testing