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

钟巍; 田宙; 王铁良; 王占江

doi:10.11779/CJGE201402011

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 English Version

西北核技术研究所，陕西西安 710024

详细信息

作者简介:
钟巍(1986- )，男，助理研究员，主要从事爆炸力学方面的研究工作。E-mail: lengshui222@163.com。

中图分类号: U45
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出版历程
- 收稿日期: 2013-06-20
- 发布日期: 2014-02-20

Analytic calculation and experimental study on gas seepage dynamics problem of surrounding rock with an internal cavity

Northwest Institute of Nuclear Technology, Xi'an 710024, China

摘要

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。
- 内含空腔围岩 /
- 气体渗流 /
- 达西定律 /
- 解析计算 /
- 花岗岩渗流试验
Abstract: Taking the surrounding rock with an internal cavity as the research object, considering the influence of the major factors, such as rock fracture, porosity and permeability of rock, theoretical studies on the gas seepage problem are carried out. Based on the Darcy’s law, analytical formulas for some important parameters of the gas seepage problem in the surrounding rock with an internal cavity, mainly including the amount of gas permeability and the arrival time of the gas seepage, are derived. The relevant experiments on gas seepage in granite are performed, in which, the TNT explosive charge is exploded in the center cavity of the granite, and taking the detonation product CO as the trace gas, the amount of gas permeability and the arrival time of the gas seepage are obtained. Using the derived formulas, the amount of gas permeability and the arrival time of the gas seepage under the same condition are calculated. The results show that calculating these parameters by using the formulas is a precise and effective way. Also, it is a rapid way, and for this reason, it is really functional for emergency issues of practical projects. Meanwhile, the analytical formulas derived according to theoretical analysis may provide important reference for the validation of numerical results and for the design of experimental studies.
- surrounding rock with an internal cavity /
- gas seepage /
- Darcy's law /
- analytic calculation /
- seepage experiment of granite

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