| The foundation and key of mine network settlement is to determine the coefficient of frictional resistance. This article launches the research from the aspects of determination of friction coefficient and so on. The calculation formula of coefficient of frictional resistance is summarized according to different roadway. Through multiple regression equation to count the frictional resistance coefficient formula of the roadway. Relatively accurate method is provided to establish the friction coefficient of the mine roadway. In the completely turbulent area, coefficient of frictional resistance is associated with the relative roughness of pipeline rather than Reynolds number. For complex mine ventilation conditions, determination of coefficient of frictional resistance to spend a lot of human and material resources, and the relative error is bigger. In this paper, according to the characteristics of the database, the query technology of the expansion fuzzy database system is applied to the mine prediction of frictional resistance coefficient. By fuzzy query coal mining history of frictional resistance coefficient measurement data to get the high matching degree same type of the frictional resistance coefficient or similar types of frictional resistance coefficient. The necessary parameters and relatively accurate basis is provided for the mine ventilation network solution. |
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