关键词: 深部开采　, 矿井通风　, 通风参数优选　, 数值分析　, 正交试验　, 现场应用

Abstract: To address the high-temperature issue at the heading face in the deep mining area of the Gaofeng Mine,local ventilation was adopted for cooling purposes.Prior to implementing ventilation cooling,it was necessary to select appropriate ventilation parameters to ensure effective cooling performance.A combined approach of numerical analysis and field experi ments was employed,and an orthogonal experimental design was developed,incorporating parameters such as duct diameter, supply air temperature,supply air velocity,and the distance between the air inlet and the working face.Numerical simulations were conducted to evaluate the cooling effects under different ventilation parameters in the blind heading,and range analysis was applied to identify the optimal combination.Subsequently,field tests were carried out based on the optimized parameters, and the measured air temperatures in the roadway were compared with the numerical simulation results.The results indicate that under all ventilation schemes,the air temperature in the blind heading decreased significantly,and the surrounding rock temperature exhibited a stepped distribution.Both the average temperature at the air outlet and the average air temperature in the roadway gradually decreased with increasing time steps.The optimal ventilation parameters were determined as follows:duct diameter of 600 mm,supply air temperature of 18 ℃,supply air velocity of 6 m/s,and distance between air inlet and working face of 20 m.The field test results obtained with the optimal parameters agreed well with the numerical predictions,with rela tive errors not exceeding 10%.This demonstrates that the numerical analysis method can provide a reliable theoretical basis for cooling blind roadways in mines.