Abstract

Based on the analysis of the effect of underground closed explosion on geological bodies, a physical model of underground seepage of closed gas explosion is obtained. The model considers the changes of porosity and permeability due to crushing, fragmentation and fracturing of the surrounding body caused in the underground closed explosion zone. The relationship between the proportional radius and porosity, laminar permeability and turbulent permeability are established, respectively, based on the experimental data. The seepage parameters of different zones are obtained accordingly. The law of the pressure field and velocity field of the gas in the geological body and the law of the migration of the explosive gas in the geological body are analyzed using adimensionless finite difference method.

中文翻译：

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深部封闭地质体内爆炸产生的高压气体无达西渗流的数值分析

摘要

在分析地下封闭爆炸对地质体的影响的基础上，获得了地下封闭气体爆炸渗流的物理模型。该模型考虑了在地下封闭爆炸区内由于周围物体的压碎，破碎和破裂而引起的孔隙度和渗透率的变化。根据实验数据，分别建立了比例半径与孔隙率，层流渗透率和湍流渗透率之间的关系。相应地获得了不同区域的渗流参数。采用无因次有限差分法分析了地质体内气体的压力场和速度场规律以及地质体内爆炸性气体的迁移规律。