Abstract
Deep mines are greatly affected by changes in natural wind pressure because of their large buried depths and long ventilation paths. Changes in natural wind pressure do affect the air flow of the underground ventilation system, and even change the direction of individual branches. If the dynamic changes of natural wind pressure are not monitored constantly, it is very likely to cause disasters such as gas overrun and may even lead to heavy casualties. In this paper, the changes of natural wind pressure and the air volume entering the mine are measured on-site in the 630 mining area in the south wing of Tangkou Coal Mine, Then, compare the change law of natural wind pressure with the change law of ventilation air volume. Finally, through numerical simulation by FLUENT, the change of internal flow in the gob where there is a loosely closed condition is simulated. Through research, the annual natural wind pressure change and the change of air intake in the 630 mining area of the south wing of Tangkou Coal Mine were obtained; The influence of changes in external conditions on the ventilation air volume of deep mines is obtained; The importance of the influence of natural wind pressure on the stability of the deep mine ventilation system is verified.
Highlights
Mine ventilation is a fundamental measure to change coal mine safety
Combined with the ventilation network solution model, they can determine the degree of stability of the mine ventilation system and the location in the roadway that affects the stability of the mine ventilation system [28]
In order to study the influence of natural wind pressure on the ventilation system in deep mines, the deep mine, Tangkou Coal Mine in China, is taken as the research background in this paper
Summary
Mine ventilation is a fundamental measure to change coal mine safety. It is used to remove and dilute the dust and gas in the mine to ensure the normal breathing of underground operators. is is very important for improving the economic benefits of the mining area and promoting the stable and healthy development of the mining area. Combined with the ventilation network solution model, they can determine the degree of stability of the mine ventilation system and the location in the roadway that affects the stability of the mine ventilation system [28] They use the ventilation system network solver tool [29] to analyze the network airflow stability of the mine ventilation system by establishing the network airflow stability coefficient matrix and analyzing the overall stability index of the network airflow, the network airflow change range index and the network change influence range index. In order to study the influence of natural wind pressure on the ventilation system in deep mines, the deep mine, Tangkou Coal Mine in China, is taken as the research background in this paper
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