Study about spatial and temporal properties of machine noise source on roadway head of mine
Li Xin, On K · Journal of Hunan University of Science & Technology · 2011
Noise on roadway head of mine from the machine seriously influenced the miners' physical and mental health,and also the noise may be a major hidden dangers of safety accident as all safety warning signal may be masked by the noise.The SPL characteristic was analysed that of machine noise source on typical heading face,and SPL range 105～120 dB(A) was got which on typical heading face during the drilling borehole stage,and rock transport stage and the equivalent continuous A 112.3 dB(A)sound level was outfitted that in a working day of miner.Noise space characteristics and long space acoustic characteristics along the roadway axial was discussed,the SPL attenuation characteristic curve with the distance from the sound source in roadway sound field and correlation parameter of roadway reverberation sound field were brought out.Certain basis for forecasting and controlling environmental noise of heading face were provided.