The recovery and utilization of waste wind is an important way to construct a green mine. In this paper, the power generation technology of air kinetic energy recovery in mine return air-head was numerically studied. Through the theoretical analysis of mine return air power generation, the key parameters of wind turbine were designed and determined. FLUENT and QBlade were used to simulate the local and overall performance of the wind turbine, respectively. The results show that NACA4412 airfoil blades have good rotating performance and aerodynamic performance since the pressure difference between pressure surface and suction surface is large by analyzing the pressure field. When the tip speed ratio is between 4 and 7. The wind energy utilization coefficient reaches the maximum value in the range of 7–8, and the maximum power coefficient can reach 0.501. The wind turbine can maintain a high-power coefficient in a wide range, and the effect is relatively ideal. In addition, under the rated wind speed of 10 m s⁻¹, the torque of wind turbine is 17 N m which is relative large. The thrust and thrust coefficient are 150 N and 0.72, respectively, so the thrust and thrust coefficient are small. In general, the wind turbine has high wind energy utilization rate and structural stability. It is feasible to recover the air kinetic energy from the mine shaft. And the research results provide a reference for the recovery and utilization of air kinetic energy in mine return air wellhead.

废风回收利用是建设绿色矿山的重要途径。本文对矿井回风头空气动能回收发电技术进行了数值研究。通过对矿井回风发电的理论分析，设计并确定了风力发电机组的关键参数。FLUENT 和 QBlade 分别用于模拟风力涡轮机的局部和整体性能。结果表明，NACA4412翼型叶片由于受压面与吸力面之间的压差较大，因此具有良好的旋转性能和气动性能。当叶尖速比在4~7之间时，风能利用系数在7~8范围内达到最大值，最大功率系数可达0.501。风力机能在较宽的范围内保持高功率系数，效果较为理想。另外，在额定风速10 m·s下^-1 , 风力发电机的扭矩为 17 N·m，比较大。推力和推力系数分别为150 N和0.72，因此推力和推力系数较小。总的来说，风力发电机具有较高的风能利用率和结构稳定性。从矿井中回收空气动能是可行的。研究结果为矿山回风井口空气动能的回收利用提供参考。