高压驱动下非均匀介质内气体输运数值模拟

通过利用商用软件,对地下腔室内的示踪气体在高压驱动下向非均匀围岩介质的输运进行了数值模拟,并分析了影响示踪气体输运行为的主要因素.结果表明,理想的均匀介质可以较好地包容示踪气体,而在实际的非均匀介质内示踪气体更倾向于以较高的浓度沿介质局部薄弱环节向外输运；腔室外的坑道中,采用堵塞段和空段的设计有利于阻止示踪气体向外输运...

Numerical Simulation of Gas Diffusion Driven by High Pressure in the Heterogeneous Media

Numerical simulation was developed towards the diffusion of tracer gas driven by high pressure in the cavity located in underground heterogeneous media by adopting commercial software,and the main factors influencing the diffusion behavior of the tracer gas was analyzed as follows: the tracer gas could be contained in ideal homogeneous media very well,but it was inclined to diffuse along local weakness at relative high concentration in heterogeneous media;the design of stemming and vacancy in tunnel outside cavity was propitious to prevent tracer gas from leaking outward;the effect of initial cavity temperature on the diffusion behavior of tracer gas was only near the cavity.A comparison with interrelated experimental datum indicated that the numerical simulation results accorded with physical rule.