内含空腔围岩中气体渗流动力学问题的解析计算与试验研究

发布时间：2018-06-16 04:46

本文选题：内含空腔围岩 + 气体渗流　；参考：《岩土工程学报》2014年02期

【摘要】：以内含空腔的围岩为研究对象,考虑围岩中裂隙度、孔隙度和渗透率等主要因素的影响,忽略次要因素的影响,进行了气体渗流问题的理论研究。基于达西定律,经分析推导,得到了计算内含空腔围岩中气体渗流问题中气体渗透量和气体渗流到达时间等重要参数的解析公式。开展了花岗岩气体渗流试验,将TNT炸药置于花岗岩内部空腔中引爆,以气体产物CO作为示踪气体,测量了其在围岩中的渗透量和渗流到达时间。使用推导的解析公式对试验进行了计算,计算结果表明,解析公式能够快速而准确地计算从内部空腔渗流到围岩介质中的气体体积和气体渗流到达时间。使用推导的解析计算公式估算围岩中气体渗流问题,计算方便快捷,对于实际工程遇到应急问题时,具有较好的实用性。同时,基于理论分析得到的解析计算公式,可以为数值模拟结果的验证和试验研究的设计提供有益的参考。
[Abstract]:Taking the surrounding rock with cavity as the research object, considering the influence of the main factors such as fissure degree, porosity and permeability in the surrounding rock, ignoring the influence of the secondary factors, the theoretical study of gas seepage problem is carried out. Based on Darcy's law, an analytical formula for calculating the important parameters such as gas permeability and gas seepage arrival time in surrounding rock with cavity is obtained. The gas percolation test of granite was carried out. TNT explosives were placed in the inner cavity of granite and detonated. The gas product CO was used as tracer gas to measure its permeability and seepage arrival time in surrounding rock. The experimental results show that the analytical formula can quickly and accurately calculate the gas volume and the gas seepage arrival time from the inner cavity to the surrounding rock medium. It is convenient and quick to estimate the gas seepage problem in surrounding rock by using the analytical calculation formula, which is useful for practical engineering when it comes to emergency problems. At the same time, the analytical formula based on theoretical analysis can provide a useful reference for the verification of numerical simulation results and the design of experimental research.
【作者单位】：西北核技术研究所;
【分类号】：TU45

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