矿井通风机为矿井主要设备,功率较大,昼夜连续运行,所消耗的电力占煤矿电耗的8%～15%。矿井通风网络在矿井开采过程中不断地变化,如巷道的延长度或缩短,断面的扩大或缩小,从而使阻力发生变化,风量也相应发生变化,经常发生风量过多或不足现象。风量过小,影响安全生产;风量过 The mine ventilator is the main equipment of the mine, with larger power and continuous operation day and night. The consumed power accounts for 8% -15% of the coal mine power consumption. Mine ventilation network in mining process continuously changes, such as roadway extension or shortening, cross-section of the expansion or contraction, so that the resistance changes, the air volume also changes accordingly, often excessive or insufficient air flow phenomenon. Wind is too small, affecting the safety of production;