Original scientific paper To analyse the influence of joint angle, number and spacing on the strength and acoustic emission (AE) characteristics of rock mass, the uniaxial compression model of rock specimens was established using the micro particle flow PFC2D software platform. The intact rock parameters were determined via trial and error, joints with different angles, numbers and spacing were...

Based on the particle flow code (PFC2D) within discrete element method (DEM), rock mass model was established according to site conditions and blasting simulated by explosive expansion method. The influence of various parameters (the peak pressure action coefficient borehole wall, buried depth, charge mode) in effect investigated. Furthermore, relationship between geometry size crater obtained....

To explore the failure mechanism of rock with holes and fissures, uniaxial compression tests sandstone samples combined double hole fissure defects were carried out using Particle Flow Code 2D (PFC2D) numerical simulation software. The behaviour mechanical properties at different angles analysed, evolution results stress field crack propagation studied. show that a decrease in angle, initiation...

The unloading failure process in mining engineering scenarios is similar to the loading at different rates indoor. To clarify relationship between mechanical properties of backfill and rate, a particle flow code 2D-based numerical simulation was performed establish model, tests involving five were conducted. following results obtained: (1) compressive strength body increases linearly with incre...

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...