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目的探讨不同作业状态下地下工事内空气中氡浓度变化规律。方法选取不同作业面,采用测氡仪连续测量。结果作业期间施工阶段洞口至深度地下600 m氡及其子体浓度为24~6251 Bq/m~3。结论随着掘进深度的增加,氡浓度随之升高;避免岩层裸露、加强通风可有效降低空气中的氡浓度。
Objective To investigate the variation of radon concentration in air under different working conditions. Methods Different working surfaces were selected and radon meters were used for continuous measurement. Results During the operation period, the concentration of 600 m radon and its daughters in the tunnel entrance to the depth underground was 24 ~ 6251 Bq / m ~ 3. Conclusions With the increase of tunneling depth, the radon concentration will increase. Avoiding the exposure of rock strata and increasing the ventilation can effectively reduce the radon concentration in the air.