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| Optimization of ventilation mode during construction of large water curtain grotto storage based on Ventsim |
| ZHAO Xingdong1, DOU Xiang1, LI Yong2, WANG Lijun3
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| （1. Safety Laboratory of Deep Metal Mining, Northeastern University, Shenyang 110819, Liaoning, China;2. China Railway Engineering Equipment Group Co., Ltd., Zhengzhou 450016, Henan, China;3. Shandong Gold Group Co., Ltd., Yantai 261400, Shandong, China） |
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Abstract Aiming at the selection of ventilation modes during the construction of a large underground cavern storage, according to the ventilation design of a large underground cavern storage, on the basis of comparing the advantages and disadvantages of the extraction type, the press-in type and the mixed type ventilation mode, and according to each ventilation mode calculate the air volume according to the method was calculated, and the ventilation mode of each stage of the construction of the large underground cavern storage was determined. A Ventsim numerical simulation model for ventilation of a large underground cavern storage was constructed, and numerical simulations were conducted to study the dynamic evolution law of wind flow in a large underground cavern storage with different ventilation modes in different construction stages, and the differences in different construction stages were analyzed. The ventilation effects of the ventilation methods were compared and analyzed, and the ventilation methods in different construction stages were optimized. The numerical simulation results showed that the optimal ventilation mode in the first construction stage was press-in ventilation, the optimal ventilation mode in the second construction stage was mixed ventilation, and the optimal ventilation mode in the third and fourth construction stages were extraction ventilation. At the same time, it was verified that the effect of wind resistance, air volume and air network efficiency of each ventilation method in different construction stages was optimal, which provided a scientific basis for the ventilation design of large underground water-sealed caverns during the construction period.
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Received: 29 December 2022
Published: 20 March 2023
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