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针对安徽某铁矿井下辅扇所形成的循环风流,采用对比试验研究方法,开展了多机串并联空气幕控制井下循环风流的试验研究。研究结果表明:(1)串并联空气幕能有效控制两中段间的污风循环,引射风量达2～24m3/s,及时排出污风,有利于井下无轨柴油汽车的行车安全和保护作业人员的身体健康;(2)空气幕正常运行时能增加辅扇的有效风量,对辅扇运行的影响度较小;(3)空气幕运行噪声为82～92dB(A),对距离其约300m的作业环境干扰较小。作业人员经过空气幕时接触噪声的时间较短,对身体健康不构成危害;(4)串并联空气幕安装在运输巷道两侧的硐室内,其供风器出口风速低于4m/s,不影响行人和无轨柴油汽车的运行。
Aiming at the circulation airflow formed by an auxiliary fan in a certain iron mine in Anhui Province, a comparative experimental study was carried out to test and study the downhole circulation airflow controlled by a series of parallel air curtains. The results show that: (1) The series-parallel air curtain can effectively control the circulation of the air between the two mid-sections, and the induced air volume reaches 2 ~ 24m3 / s, which can discharge the pollutants in time and is beneficial to the traffic safety and protection of downhole diesel vehicles (2) The effective air volume of auxiliary fan can be increased during the normal operation of air curtain, which has less influence on auxiliary fan operation. (3) The operating noise of air curtain is 82 ~ 92dB (A), and about 300m The operating environment has less interference. (4) The series and parallel air curtains are installed in the chambers on both sides of the transport tunnel, the air velocity at the outlet of the ventilator is less than 4m / s, and not Affect the operation of pedestrians and trackless diesel vehicles.