Numerical Simulation Study of Dust Transport of Comprehensive Mining Working Surface

Abstract

In order to study the wind flow field and dust transport law of the comprehensive mining work surface, taking the 21103 comprehensive mining working surface of Hulusu Coal Mine as the research object, SolidWorks was used to establish the comprehensive mining working surface model, and the comprehensive mining working surface under different inlet wind speed conditions was simulated and analyzed by Fluent. The results show that due to the existence of the high-speed wind flow belt, dust is mainly distributed near the downwind side working surface; when the inlet speed is 2.5m/s, the dust mass concentration of the comprehensive mining working surface is low and it is not easy to cause secondary dust, which is the optimal inlet speed; the dust distribution within 10m of the downwind side of the shearer is the most, which is the key area of dust prevention and control.

Influence of Air Volume and Temperature in the Air Inlet Tunnel on the Characteristics of Dust Movement

“…The smaller the average particle size of the dust, the higher the dust mass concentration. The higher the wind speed, the lower the overall dust concentration . Hu et al calculated the movement process of airborne dust in the comprehensive excavation face based on the theory of gas–solid two-phase flow, and elaborated on the characteristics of gas–solid two-phase flow in the high gas coal seam excavation face .…”

“…The higher the wind speed, the lower the overall dust concentration. 12 Hu et al calculated the movement process of airborne dust in the comprehensive excavation face based on the theory of gas− solid two-phase flow, and elaborated on the characteristics of gas−solid two-phase flow in the high gas coal seam excavation face. 13 Wang used numerical simulation to identify the impact of the flow field on dust transport and settlement when using pressure ventilation in excavation tunnels: large particle dust deposition and accumulation occur within 3−5 m from the end of the excavation face.…”

Numerical Simulation Study of Dust Transport of Comprehensive Mining Working Surface

“…In the process of mining coal will inevitably produce a large amount of dust [1][2], dust concentration is too high when prone to explosion, seriously threatening the life of workers, and the comprehensive mining work surface is one of the most important dust production sites [3][4] [5], the mass concentration of dust can reach 2000 , has been far higher than the quality concentration standard of safe production [6] [7]. With the further development of mining machinery, improving dust reduction efficiency and solving the harm caused by dust is the top priority of safe production [8].…”