Joints and fissures in natural rocks have a significant influence on the stability of the rock mass, and it is often necessary to evaluate strength failure and crack evolution behavior. In this paper, based on experimental tests and numerical simulation (PFC2D), the macro-mechanical behavior and energy mechanism of jointed rock-like specimens with cross non-persistent joints under uniaxial load...

To study the influence of different resistance lines and rows delay intervals on shape muck pile throwing distance open-pit bench blasting based test, two-dimensional particle flow code (PFC2D) is used for numerical simulation. The experimental simulation data were compared analyzed, error value was acceptable. Meanwhile, row are to conduct analysis. results show that height change directly pro...

In this paper, numerical simulations of face stability shallow tunnels are carried out by using the particle discrete element codes PFC2D from microscopic view. Progressive instability tunnel is achieved through withdrawal baffle used to simulate face. Under different retreating displacement face, evolution laws support pressure on ground deformation, surface settlement and contact force chain ...

Understanding the failure mechanism and modes of multiface slopes in Wenchuan earthquake can provide a scientific guideline for slope seismic design. In this paper, two-dimensional particle flow code (PFC2D) shaking table tests are used to study slopes. The results show that with different moisture content under loads. 5%, 8%, 12% shattering-shallow slip, tension-shear shattering-collapse respe...

To promote the application of ultrasonic vibration rock crushing technology in underground rock-drilling engineering, it is necessary to investigate damage and fracture characteristics hard under excitation vibration. In this study, brittle red sandstone was taken as research object, experiments were carried out, macrodeformation samples monitored by strain gauges. The experimental results show...

The common occurrence of various number and distribution hole flaws complicates the mechanical behavior fracture mode rock masses that contain them. This study develops seven numerical models limestone samples with different numbers distributions circular using 2-D particle flow discrete element code (PFC2D) to investigate their impact on properties while maintaining same area. In addition, it ...

A discrete-continuous coupling analysis method based on FLAC2D/PFC2D is established with the help of program’s own FISH language and Socket O/I data transfer interface. According to statistical characteristics mesostructure slope site, computer stochastic simulation used construct model soil–rock mixture in discrete domain. The deformation failure mechanism SRM studied by using coupled method. ...

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...