Surface Waves and SeismicWavesRayleighwaveRayleigh waveis the surface wave of propagating along the freesurface.Wavespassby,particlesinfreesurface makereverseelliptical motion inthevertical ray plane, long axisperpendiculartothefreesurface,shortaxis parallel tothefree surface.lovewavelove waveis the surface wave of propagating along the level inBlayeredrocksurfacewave.Theparticlesmakevibrationintheformof shearing in the vertical direction of propagation of transversaldirection,novertical motion component.SeismicwaveSeismic wave is the elastic wave of particle making periodicvibration ,the sine wave of particle as a harmonic oscillator.Seismic damagemainly absolute ontheparticlevibration velocityComparedwithnatural earthquake,thefeatureofexplosionearthquake is :Source energy is small, Influence range is not big,the duration is short, high frequency,and its intensity,direction,and duration canforecastand control.2016/11/9ChapterFourBlasting Engineering Geology
2016/11/9 Chapter Four Blasting Engineering Geology 7 Surface Waves and Seismic Waves Seismic wave is the elastic wave of particle making periodic vibration ,the sine wave of particle as a harmonic oscillator. B C Rayleigh wave love wave Seismic wave Rayleigh wave is the surface wave of propagating along the free surface. Waves pass by, particles in free surface make reverse elliptical motion in the vertical ray plane, long axis perpendicular to the free surface, short axis parallel to the free surface. love wave is the surface wave of propagating along the level in layered rock surface wave. The particles make vibration in the form of shearing in the vertical direction of propagation of transversal direction, no vertical motion component. A Compared with natural earthquake， the feature of explosion earthquake is :Source energy is small, Influence range is not big, the duration is short, high frequency, and its intensity, direction, and duration can forecast and control. Seismic damage mainly absolute on the particle vibration velocity
The Media Deformation Caused by theStressWave(a)(c)(d)(b)(e)The media deformationcaused by thestress wave(a)longitudinalwave（b)Transversewave（c)lovewave;(d)Rayleighwave(e)Rayleighwaveparticlemotiondirection2016/11/9ChapterFour Blasting Engineering Geology
2016/11/9 Chapter Four Blasting Engineering Geology 8 The Media Deformation Caused by the Stress Wave The media deformation caused by the stress wave （a）longitudinal wave（b）Transverse wave（c）love wave；（d）Rayleigh wave （e）Rayleigh wave particle motion direction