Computational and Experimental Investigations of Fluid Flow in Rock Materials

The fracture network created by the expansion of induced fracture and its intersection with natural fracture is complex [5]. [...]it is of vital importance to understand the mechanism of fluid flow in rock materials. The result shows that the trend of released energy of damaged coal has good consistency with the variation of permeability, and water injection can reduce the stress concentration and energy concentration of the rock burst system. C. Li et al. used an EDEM-FLUENT coupling simulation system to implement a numerical simulation studying variable-mass permeation of broken rock mass under different cementation conditions, and time-dependent change laws of parameters like porosity and permeability and the mass loss rate of broken rock specimens under the erosion effect were obtained. Y. Jin et al. studied the effects of the grain-sized mixtures (distribution) and the stress state on the mechanical behaviors of grouted crushed coal specimens with a self-designed grouting apparatus, finding that the average slope values of the σp-σ3 curves for the grouted specimens with different grain-sized mixtures were all larger than those of the σr-σ3 curves. [...]it was also found that the reinforcement effect of the grouted specimen related to the splitting grouting mode (occurring in most of the large specimens) seems to be better than that related to the penetrating (filling) grouting mode (in most of the small specimens).