Numerical analysis on acoustic field characteristics of excavation roadway based on surface integration method
Abstract：Based on surface integration method,sound energy density of the excavation roadway,mathematical model of the sound pressure level and model of micro-element mesh were established,and sound field characteristics of long space in excavation roadway was analyzed and calculated by using Matlab software.Moreover,the influence of roadway sound field caused by receiving point distance,sound absorption coefficient and the radius of curved surface and so on were analyzed.The study results indicate that as the divided plane numbers of semicircle arched curved surface in cross section is odd numbers,the scattering acoustic pressure level is bigger than that of even numbers;as the receiving point is far from sound source along the direction of excavation roadway,sound pressure level of excavation roadway attenuates in the shape of a curve,meanwhile the speed of attenuation becomes slower;as the absorption coefficient of roadway rock increases,the speed of attenuation gets slower along distance;as the radius of curved surface of excavation cross section increases,maximum sound pressure level not only decreases,but also decays with a slow rate.
Keywords：surface integration methodsound field characteristicsnumerical calculation
Publication Date：2011-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)