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作 者:叶勇军[1] 丁德馨[1] 周星火[1] 李向阳[1]
机构地区:[1]南华大学核资源与安全工程学院,湖南衡阳421001
出 处:《核科学与工程》2009年第2期188-192,共5页Nuclear Science and Engineering
基 金:国家自然科学基金资助项目(0575048);国家安监总局安全生产科技计划项目(06-391;08-197);湖南省安全生产科技计划项目(HN08-06);湖南省自然科学基金资助项目(09jj6078)
摘 要:为了改善地下铀矿井作业空间的辐射条件,本文阐述铀矿独头巷道通风气流中氡及其子体α潜能浓度的数学描述公式,推导出独头巷道按照排氡和排氡子体最大掘进长度的计算公式。研究了独头巷道通风量Q、巷道断面积S、入风氡浓度C_O、入风氡子体α潜能浓度E_O和巷道氡析出密度D_V与最大掘进长度L_(max)的关系,结论为:独头巷道的最大掘进长度L_(max)随着C_O、E_O、S、和D_V的增大而减小,随着Q的增大而增大;同时还发现:当氡析出密度D_V=1.463 Bq/(m^3 s)时,L_(max,Rn)=L_(max,α);当D_V<1.463 Bq/(m^3 s)时,L_(max,Rn)>L_(max,α);而D_V>1.463 Bq/(m^3 s)时,L_(max,Rn)<L_(max,α)。文中也给出了一些减少氡及其子体浓度的优化措施。For improving radiation condition of dummy drift in underground uranium mines, this paper expounds the mathematical description of radon concentration and potential alpha energy of its progeny in ventilation airflow, and educes the calculation formula of the maximal driving length of dummy drift for exhausting radon and its progeny. Then, this paper studies the relationships between the maximal driving length (L ) and air-quantity of ventilation system for dummy drift (Q), section area of dummy drift (S), radon concentration of intake air (C0), potential alpha energy of radon progeny (E0) of intake air and radon emanation density of dummy drift (Dv) respectively, and obtains the below conclusions (i) Lmax is decreases with increased Co, E0, S and Dv respectively, on the contrary increases with increased Q, (ii) when Dv=1.463 Bq/(m^3s), L R. = L max,α when Dv〈1.463 Bq/(m^3s), Lmax Rn〉L max,α when Dv〉1.463 Bq/(m^3s), Lmax,α In this paper, some optimization measures of reducing radon and its progeny are also given.
分 类 号:TD724.4[矿业工程—矿井通风与安全] TD724
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