Experimental and Numerical Investigations of Dynamic Failure Mechanisms of Underground Roadway Induced by Incident Stress Wave

The mechanisms of dynamic disasters around underground roadways/tunnels were examined by adopting split Hopkinson pressure bar (SHPB) laboratory tests to reproduce the failure process surrounding rock subjected incident stress waves. On basis ensuring consistency numerical simulations with experimental results, and spatiotemporal evolution hoop hole studied using a two-dimensional particle flow code (PFC2D). results simulation indicate that tensile compressive concentrate along horizontal vertical directions hole, respectively, owing instantaneous incidence modes rocks are significantly different when is various intensities In addition, stability greatly affected amplitude wavelength wave elastic modulus rock.