부산대학교 도서관

Based on the characteristics of complex mine roadway structure, many affected factors, and difficult implementation of wind measurement, proposes a method for measuring the wind by position pressure difference, that is, by measuring the pressure difference between two points to calculate the air volume of the roadway. Under the normal ventilation condition of the mine, the comprehensive wind resistance of the measuring section is determined as a fixed value by changing the measured sum value of the working conditions of the ventilator. difference, use the air volume Q = $\sqrt{\frac{\Delta \mathrm{h}}{\mathrm{R}_{\mathrm{z}}}}$ to obtain the roadway air volume. It is verified by a combination of experimental research and numerical simulation. The experimental results show that the air volume and comprehensive wind resistance measured by the positional differential pressure wind measurement method and the air volume error obtained by the conventional wind measurement method do not exceed 5%. The numerical simulation results show that no matter how the wind speed changes, the comprehensive wind resistance value in the roadway is a fixed constant, and the relationship between the pressure drop and the square of the air volume approximately satisfies the linear equation: y=ax+b, and the relative error of the comprehensive wind resistance is less than 5%. The comprehensive results show that the positional differential pressure wind measurement method has high measurement accuracy and simple operation, and is especially suitable for areas such as wind tunnels that are difficult to measure accurately.