爆破后压入式通风独头巷道内氡的运移模型

叶勇军, 江俊廷, 丁德馨, 钟永明, 谢超

叶勇军, 江俊廷, 丁德馨, 钟永明, 谢超. 爆破后压入式通风独头巷道内氡的运移模型[J]. 原子能科学技术, 2016, 50(3): 571-576. DOI: 10.7538/yzk.2016.50.03.0571
引用本文: 叶勇军, 江俊廷, 丁德馨, 钟永明, 谢超. 爆破后压入式通风独头巷道内氡的运移模型[J]. 原子能科学技术, 2016, 50(3): 571-576. DOI: 10.7538/yzk.2016.50.03.0571
YE Yong-jun, JIANG Jun-ting, DING De-xin, ZHONG Yong-ming, XIE Chao. Transport Model of Radon in Blind Roadway with Forced Ventilation after Blasting[J]. Atomic Energy Science and Technology, 2016, 50(3): 571-576. DOI: 10.7538/yzk.2016.50.03.0571
Citation: YE Yong-jun, JIANG Jun-ting, DING De-xin, ZHONG Yong-ming, XIE Chao. Transport Model of Radon in Blind Roadway with Forced Ventilation after Blasting[J]. Atomic Energy Science and Technology, 2016, 50(3): 571-576. DOI: 10.7538/yzk.2016.50.03.0571

爆破后压入式通风独头巷道内氡的运移模型

Transport Model of Radon in Blind Roadway with Forced Ventilation after Blasting

  • 摘要: 为有效指导铀矿井下独头巷道的通风设计,基于质量守恒定律和置换通风理论,首先建立了描述爆破后压入式通风独头巷道内抛掷空间和风流末端氡活度浓度随通风时间变化的计算模型,利用该模型得到了达到氡活度浓度限值条件的最短排氡通风时间的确定方法;然后分析了不同参数对风流末端氡活度浓度以及最短排氡通风时间的影响。结果表明,爆破后,独头巷道风流末端氡活度浓度在一定通风时间内保持不变,之后瞬间增至峰值,最终逐渐衰减至稳定;在其他参数一定的情况下,风流末端氡活度浓度开始剧增的时间随巷道长度的增加而减小,随风量增加而增大;风流末端氡活度浓度衰减速率随风量的增加而增大;风流末端氡活度浓度峰值随掘进面铀品位的增加而增大;最短排氡通风时间随巷道长度和掘进面铀品位的增加而增大,随通风量的增加而减小。

     

    Abstract: In order to guide the design of ventilation in the blind roadway under uranium mine, based on the theories of mass conservation and displacement ventilation, the calculation models for the variation of radon activity concentration with ventilation time after blasting in the throwing-space and in the wind end were firstly built. With the models, the calculation method of the theoretical shortest ventilation time for eliminating radon in the blind roadway which meets radon activity concentration limit was obtained, and the influences of different parameters on the activity concentration of radon in the wind end and the shortest ventilation time to eliminate radon were both analyzed. The results show that after blasting radon activity concentration in the wind end suddenly rises up to peak value after keeping stable for certain ventilation time, and it finally decays gradually to steady value. With other parameters unchanged, the start moment that radon activity concentration suddenly rises up decreases with the increase of the length of the blind roadway, but increases with the ventilation volume. The decay speed for radon activity concentration in the wind end increases with the ventilation volume. The peak value of radon activity concentration increases with the uranium grade of the driving face. The shortest ventilation time to eliminate radon increases with the length of the blind roadway and the uranium grade of the driving face, and decreases with the increase of the ventilation volume.

     

  • [1] 赵云胜,罗中杰,刘如民. 地质勘探巷道的通风新方法探讨[J]. 中国安全科学学报,1997,7(1):55-59.ZHAO Yunsheng, LUO Zhongjie, LIU Rumin. Study on the new methods of auxiliary ventilation[J]. China Safety Science Journal, 1997, 7(1): 55-59(in Chinese).
    [2] 范洪滨. 独头巷道氡的析出特性与排氡通风[J]. 铀矿冶,1984,3(3):50-55.FAN Hongbin. Characteristics of radon escaping and mode of ventilation for radon discharging in some blind heading[J]. Uranium Mining and Metallurgy, 1984, 3(3): 50-55(in Chinese).
    [3] 周星火,李先杰. 某矿氡污染分析和通风降氡效果[J]. 辐射防护通讯,2002,22(3):7-11.ZHOU Xinghuo, LI Xianjie. Radon contamination analysis and control in a uranium mine[J]. Radiation Protection Bulletin, 2002, 22(3): 7-11(in Chinese).
    [4] RICHON P, PERRIER F, SABROUX J, et al. Spatial and time variations of radon-222 concentration in the atmosphere of a dead-end horizontal tunnel[J]. Journal of Environmental Radioactivity, 2004, 78(2): 179-198.
    [5] EIFAWAL M. Mathematical modelling for radon prediction and ventilation air cleaning system requirements in underground mines[J]. Journal of American Science, 2011, 7(2): 389-402.
    [6] 叶勇军,丁德馨,周星火,等. 铀矿井独头巷道最大掘进长度的研究[J]. 核科学与工程,2009,29(2):188-192.YE Yongjun, DING Dexin, ZHOU Xinghuo, et al. Study on the maximal driving length of dummy drift in uranium mines[J]. Chinese Journal of Nuclear Science and Engineering, 2009, 29(2): 188-192(in Chinese).
    [7] 叶勇军,丁德馨,王立恒,等. 压入式通风独头巷道内氡及其子体浓度的计算模型与其分布规律[J]. 中南大学学报,2015,46(5):1799-1805. YE Yongjun, DING Dexin, WANG Liheng, et al. Calculation model of radon and its daughters concentration in blind roadway with forced ventilation and their distribution rule[J]. Journal of Central South University, 2015, 46(5): 1799-1805(in Chinese).
    [8] 叶勇军,王立恒,丁德馨,等. 压抽混合式通风独头巷道内氡及氡子体浓度的计算模型及其分布规律研究[J]. 核科学与工程,2014,34(2):219-227.YE Yongjun, WANG Liheng, DING Dexin, et al. Study on calculation models and distribution rules of the radon concentration and its progenies concentration in blind roadway with forced exhaust ventilation[J]. Nuclear Science and Engineering, 2014, 34(2): 219-227(in Chinese).
    [9] 伍颖,李庆双,王坤. 某铀矿井氡析出量与排氡通风量的估算[J]. 安全与环境工程,2011,18(1):45-47.WU Ying, LI Qingshuang, WANG Kun. Calculation of the precipitation amount of radon and rowing of radon ventilation for a mine[J]. Safety and Environmental Engineering, 2011, 18(1): 45-47(in Chinese).
    [10] 张哲,朱民安,张永祥. 地下工程与人居环境氡防护技术[M]. 北京:原子能出版社,2010.
    [11] 赖涤泉. 隧道施工通风与防尘[M]. 北京:中国铁道出版社,1994.
    [12] 周星火,邓文辉,吴钢,等. EJ/T 359-2006铀矿井排氡及通风技术规范[S]. 北京:中国标准出版社,2006.
计量
  • 文章访问数:  236
  • HTML全文浏览量:  0
  • PDF下载量:  970
  • 被引次数: 0
出版历程
  • 刊出日期:  2016-03-19

目录

    /

    返回文章
    返回