Based on the radio waves propagation models of circular tunnels and rectangular tunnels,the relation between attenuation and conductivity is analyzed and the concept of conductivity breakpoint is presented.

Natural boundary element method for the stress field of circular roadway's surrounding rock;

Analysis of stress field of rock surrounding circular roadway based on damage theory;

This paper gives an analytic solution of non-circle opening based on linear viscoelastic theories and theory of function of a complex variable.

Equivalent analysis method of electromagnetic waves propagation in semi-circular arched tunnel;

Practice of anchoring and grouting in large-deformation cataclastic rock tunnels;