1�� College of Construction Engineering��Jilin University��Changchun 130026��China; 2�� Siping Northeast Geotechnical Engineering Company��Siping 136000��Jilin��China

Monitoring drilling deviation is important for drilling of boreholes and measuring injection rock permeability by Lugeon value for safe and efficient drilling and grouting�� This paper is aiming at the study drilling deviation and relationship between drilling and injection permeability at the depth of 100 m in dam of Pushi River�� The results show that at different depths the deviation of grouting borehole is within the allowable range according to specifications�� LU value decreases with the depth increased in general��but at the depths between 40- 41 m the permeability is 1. 5 LU��and at 24 m the LU value is the largest ( 2 LU) in this site by this study�� The study thus concludes that even though the rocks are hard and their injection permeability decreases with depth increased��good drilling practices including carefully considering technical and geological specifications can get good drilling boreholes��