Abstract:

The turn of the roadway which can lead to turbulence,causing unstable flow,but the flow station need to construct in the area of stable flow to monitor the change of flow effectively.The author set up different sizes of roadway cross-section model, simulated the wind flow, analyzed the velocity distribution on different location,studied the influence of the size of roadway cross-section to the position of coal mine. The numerical simulation results show that the greater the cross-section of roadway,at the turn of the roadway ,after the disorder of the flow, the more difficult to achieve stable flow. The horizontal direction of cross-section is more difficult to achieve stable flow than the vertical direction. And import’s flow influence export direction more greatly, make export direction to achieve the stable flow farther. Under certain models,by fitting with the least square method,the flow station and the size of roadway cross-section meet the linear relationship:y=a+bx.

Key words: Flow station, numerical simulation, stable flow, cross-section of roadway