Nuclear Techniques ›› 2016, Vol. 39 ›› Issue (5): 50202-050202.doi: 10.11889/j.0253-3219.2016.hjs.39.050202

• LOW ENERGY ACCELERATOR, RAY AND APPLICATIONS • Previous Articles     Next Articles

Concentration distribution rules and characteristics of radon and its progeny in blind roadway with exhaust ventilation

ZHANG Yuxuan1, YE Yongjun2,3, XIAO Detao1, JIANG Junting2, DING Dexin3, ZHONG Yongming2, XIE Chao2   

  1. 1. School of Nuclear Science and Technology, University of South China, Hengyang 421001, China;
    2. School of Environment Protection and Safety Engineering, University of South China, Hengyang 421001, China;
    3. Key Discipline Laboratory for National Defense for Biotechnology in Uranium Mining and Hydrometallurgy, University of South China, Hengyang 421001, China
  • Received:2015-12-30 Revised:2016-04-09 Online:2016-05-10 Published:2016-05-12
  • Supported by:

    Supported by National Natural Science Foundation of China(No.11105069, No.11575080);Key Technology Project of Prevention for Safety Production Major Accident(No.hunan-0015-2015AQ)

Abstract:

Background: The blind roadway is one of the most important places where radon and its progeny’s concentration is high in uranium mine exploitation. Purpose: The aim is to guide the design of exhaustion of radon and its progeny in blind roadway. Methods: The simplified mathematical relationships were primarily improved between radon concentration and radon progeny alpha potential energy concentration in the wind in uranium mine, and the influence of ventilation resistance force on rock wall radon release rate was analyzed; the mathematical calculation models of distribution for the concentration of radon and radon progeny in the blind roadway with driving-force ventilation were obtained, respectively, and through the models the minimum wind volume formulas for exhausting radon and its progeny in blind roadway were obtained. According to some particular roadways, the influence of different ventilation volumes and exhalation rates of radon on rock wall on radon and its progeny concentration, the influence of variable physical parameters on the wind volume for exhausting radon and its progeny in the blind roadway were discussed, respectively. Results & Conclusion: The results show that, the further it is from the roadway inlet, the higher the concentration of the radon and its progeny in the blind roadway is. And the concentration of radon and its progeny decreases with the increment of the wind volume, while increases with the increment of exhalation rate of radon on rock wall; the minimum wind volume needed for exhausting radon and radon progeny in the blind roadway with driving-force ventilation increases with the increment of the rock wall radon release rates and the length of the blind roadway.

Key words: Exhaust ventilation, Blind roadway, Radon and its progeny, Concentration distribution

CLC Number: 

  • TL211