The weathering depth of rockmass within both banks is much bigger, RQD lower, integral degree of rockmass poorer, underground water deeper, permeability stronger, rockmass strength and its quality lower at a large extent than that of other dam sites.

This paper puts forward results of quantitationclassification and qualitative classification of rock mass from the integrity of rock mass and hardness ofrock.

From the stress behaviour of the roadway and its maintenance situation, it is proved that the improvement of rock mass integrity and strength is the main factor affecting roadway maintenance situation.

By comparing and analyzing the borehole data with the digging hole examination result, this paper suggests the classification standard of the rock mass integrity of Liuzhou Hrilomite.

Based on the study of the relationship between geological structure and the tectonic face, the new method for definittion of crack effect on rockmass integrality of rock aroud gateway is abtained.

Based on the change of the developing degree of joint,the rockmass integrality and rockmass structure,this paper studies how to classify the rockmass weathering quantitatively by joint spacing,rock quality designation and rockmass integrality coefficent and intrinsic qualitative factors.