地下坑道周围山体内氡运移力学解析

计算物理 ›› 2012, Vol. 29 ›› Issue (2): 239-244.

地下坑道周围山体内氡运移力学解析

牛冠毅, 陈剑杰, 王君

西北核技术研究所, 陕西西安 710024

收稿日期:2011-04-27 修回日期:2011-08-01 出版日期:2012-03-25 发布日期:2012-03-25
作者简介:牛冠毅(1980-),男,硕士,工程师,主要从事辐射防护与计算力学研究,E-mail:gyniu@sina.com

Mechanical Analysis of Radon Transport in Vicinity of an Underground Tunnel

NIU Guanyi, CHEN Jianjie, WANG Jun

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

Received:2011-04-27 Revised:2011-08-01 Online:2012-03-25 Published:2012-03-25

摘要/Abstract

摘要： 基于连续介质力学原理,建立氡在地下坑道周围山体内运移的-维径向对称模型,分析在浓度扩散和气体渗流条件下,坑道周围山体内氡浓度分布,并给出氡浓度的解析表达式.用有效运移距离的概念,定量描述对坑道内氡浓度有影响的山体范围,给出有效运移距离和有效孔隙率、比渗流速度之间的关系式,同时给出坑道壁面上氡析出率的表达式.

关键词: 氡, 坑道, 析出率, 有效运移距离

Abstract: A radial symmetrical model of radon transport in vicinity of an underground tunnel is developed with continuum mechanics theory.Distribution of radon concentration in the vicinity of tunnel is analyzed under the assumption that only diffusion and permeation are considered.Analytic solutions are obtained.A rock mass range affecting the radon concentration in the tunnel is defined as effective transport distance.Effective transport distance as functions of effective porosity and velocity are given.Expressions of radon exhalation rate on tunnel wall are shown.

Key words: radon, tunnel, exhalation rate, effective transport distance

中图分类号:

O368

牛冠毅, 陈剑杰, 王君. 地下坑道周围山体内氡运移力学解析[J]. 计算物理, 2012, 29(2): 239-244.

NIU Guanyi, CHEN Jianjie, WANG Jun. Mechanical Analysis of Radon Transport in Vicinity of an Underground Tunnel[J]. CHINESE JOURNAL OF COMPUTATIONAL PHYSICS, 2012, 29(2): 239-244.