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本文从风机全效率、风压和风量等影响风机轴功率的三个因素入手探讨了提高铀矿井通风技术经济效果,降低通风电耗问题。 (1) 论述了风机结构性能和工况点位置对提高风机全效率的影响。列举了CT57型风机在河元背矿井通风网路中的全效率仅为0.46的情况,提出用4-72-11型风机更替,其全效率可提高至0.84,每年可节电23万度。 (2) 论述了降低网路风阻以减少风压损失问题。结合河元背矿井情况计算出最经济合理的通风井巷断面,并建议主通风井巷采用光面爆破和喷浆衬砌以减少α值。 (3) 根据铀矿山风量计算的特点,提出减少铀矿井所需风量的主要问题在于最大限度地控制氡的析出量,并认为应从并巷设计、开采顺序、采矿方法、回采工艺和生产管理等方面加以注意。
In this paper, three factors that affect fan shaft power, such as full fan efficiency, air pressure and air volume, are discussed to improve the economic effect of ventilation technology of uranium mine ventilation and to reduce the problem of ventilation and power consumption. (1) Discussed the fan structure performance and working point position to improve the overall efficiency of the fan. The overall efficiency of CT57 fan in Hoyuan mine ventilation network is only 0.46. It is proposed that replacing with 4-72-11 fan will increase the overall efficiency to 0.84 and save 230,000 kWh each year. (2) Discussed the problem of reducing the windage resistance of the network to reduce the wind pressure loss. According to the situation of Heyuan back mine, the most economical and reasonable ventilation shaft section is calculated, and the main ventilation shaft is recommended to use smooth blasting and shotcrete lining to reduce α value. (3) According to the characteristics of uranium mines, the main problem of reducing the amount of air needed by uranium mines is to control the amount of radon deposition to the maximum extent. It is considered that the design of mines, the sequence of mining, the mining methods, the mining technology, the production management and so on Aspects to pay attention.