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矿井巷道掘进工作面环境噪声严重影响矿工的身心健康,并可能掩蔽各种安全警报信号而成为安全事故的重大隐患.分析了典型掘进工作面不同作业时段机器噪声源的声压级特性,得到了从凿岩钻孔到装岩运输整个过程中工作面噪声的105～120 dB(A)的范围值和矿工一个工作日的112.3 dB(A)等效连续A声级值;探讨了巷道掘进工作面噪声的空间特性和沿巷道轴向长空间中的声场特性,得到了巷道声场声压级随接受点离声源距离的衰减特征值及其混响声场的相关参数,为掘工作面环境噪声预测与控制提供了一定依据.
The environmental noise of mine roadway driving face seriously affects miners’ physical and mental health and may mask all kinds of safety warning signals and becomes a serious hidden danger of safety accidents.The sound pressure level characteristics of machine noise sources at different working hours of typical driving face are analyzed, The range of 105-120 dB (A) of the working face noise from drilling to rock loading and the equivalent continuous A sound level value of 112.3 dB (A) for one working day of the miners were explored; the work of roadway excavation The spatial characteristics of surface noise and the sound field characteristics in the long axial space of the roadway, the attenuation parameters of the sound pressure level of the sound field of the roadway with the distance of the receiving point from the sound source and the parameters of the reverberant sound field are obtained. Prediction and control provide some basis.