Key technology of wind forecast in a long heading face
Abstract：According to the percolation theory of fluid dynamics and nonlinear,in calculating the critical penetration,the critical flow velocity and the average pores diameter of duct on the basis of parameters,the model determining duct leakage flow state was established.Based on the maximum duct pressure and hectometer of air leakage rate under a typical mine,the linear flow distribution of duct air leakage was obtained in mine conditions.The mathematical model of duct leakage was established.A boundary condition to actual duct inlet air volume and inlet air duct static pressure and air volume exports,the duct leakage and pressure distribution in heading face of long-distance was simulated.The inversion theory was got about the drag per unit length of duct and the laminar flow leakage drag unit length of duct.It is consistent with the measured results of numerical simulation.
Keywords：wind forecastlinear seepageair duct parameterair duct leakage flow statediagnostic model
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)