5Heoke. , Bray J. W. , Rock slope engineering, Revised second e- dition[M]. Institution of mining and metallurgy, London, 1977, 142-155.
6Goodman R. E., ShiGenhua. Block Theory and Its Application To- rock Engineering[M]. Englewood Cliffs.Prentice-Hall, 1985.
7Stoke,IIKH,Nazarian S.Effectiveness of ground improvement from spectral analysis of surface waves[A].In:pro.8^th Euro conf on Soil Mech and Found Eng[C].1983.