Supported by the National Natural Science Foundation of China (50974061); the Natural Science Foundation of Hebei Province (E2009001420)
On the basis of the survey of underground noise in Jinggezhuang and Donghuantuo mines, Kailuan Group, noise radiation intensity, noise propagation properties and noise frequency-spectrum characteristics of underground...
Supported by the National Natural Science Fundation of China(50974061);the Natural Science Fundation of Hebei Province(E2009001420)
In order to determine the characteristics of noise source accurately, the noisedistribution at different frequencies was determined by taking the differences into accountbetween aerodynamic noises, mechanical noise, e...