Research on numerical simulation model for crack growth driven by detonation gas in high-deep rock strata

摘要

The effect of detonation gas upon rock fracture is the cross-frontier research project of fluid dynamics coupling and rock dynamics of crack dynamic growth, having the important scientific significance and explicit application value. In the process of detonation gas driven fracture growth, the varying law of the denotation gas pressure distribution in cracks is inter-influent with the geometric morphology variations in crack growth. This paper analyzes the denotation gas flowing behaviors, establishes the flowing model for denotation gas in rock cracks and the models for the rock crack dynamic response. Also suggests the fluid-solid coupling model for the denotation gas flowing, rock crack response and the numerical model for simulating crack growth driven by the denotation gas. The simulation program is developed on the large-sized rock engineering finite element software (FINAL platform). This numerical analysis platform is used to carry out the systematic numerical experimental study of several main influencing factors of core problems concerning pressure fracture length.