独头巷道爆破后氡及炮烟的运移规律  

Transport of radon and blasting-fume in blind roadway with exhaust ventilation after blasting

作　　者：叶勇军[1,2] 江俊廷 丁德馨[2] 钟永明[1] 谢超[1] 

机构地区：[1]南华大学环境保护与安全工程学院,湖南衡阳421001 [2]南华大学铀矿冶生物技术国防重点学科实验室,湖南衡阳421001

出　　处：《中国安全科学学报》2015年第5期131-137,共7页China Safety Science Journal

基　　金：国家自然科学基金资助(11105069)

摘　　要：为有效指导铀矿井下独头巷道掘进面爆破后通风排氡与排炮烟的设计与管理,基于质量守恒定律和置换通风理论,建立独头巷道内抛掷空间和风流末端氡及炮烟浓度随通风时间变化的计算模型。分析岩石铀品位、通风风量、岩壁氡析出率和巷道长度对氡浓度的影响,以及通风风量对炮烟浓度的影响。利用所建模型,分别提出满足氡浓度和CO浓度限值条件下,独头巷道排氡与排炮烟的理论最短通风时间的计算方法。结果表明:在相同参数条件下,由最短通风时间计算方法得到的排炮烟与排氡时间有差异,建议巷道爆破后的最短通风时间取二者中较大值。After blasting,the driving face of blind roadway in uranium mine will release high concentrations of radon and basting-fume. In order to instruct the design and management of eliminating radon and blasting-fume in the blind roadway after blasting effectively,based on the theories of mass conservation and displacement ventilation,models were built for calculating radon concentration and blasting-fume concentration as functions of ventilation time in the throwing-space and wind end,respectively. Influences of uranium content of rock,ventilation volume,exhalation rate of rock wall and the length of roadway on radon concentration and the influence of ventilation volume on blasting-fume concentration were studied. Then,with the models,calculation methods were put forward for theoretical shortest ventilation time for eliminating radon and blasting-fume in the blind roadway which meets radon concentration limit and CO concentration limit. The results show that under the same condition,there is difference between the value of eliminating radon time and that of removing blasting-fume time. It is suggested that the shortest ventilation time should be the bigger one of two time values.

关 键 词：铀矿 独头巷道 爆破 氡浓度 炮烟浓度 抽出式通风 运移规律 

分 类 号：X936[环境科学与工程—安全科学] TD868[矿业工程—金属矿开采]