Using the optimum calculating method,some important technical parameters could be determined,that is,optimum supporting force,allowable deformation of rock mass,cross section area of U-shape set,pre-ti.

With the Mohr-Coulomb criterion,the relationship between the roadway supporting force and the stress of surrounding rock,and the relationship between the roadway supporting force and the radius of plastic zone with different rock mechanical parameters were analyzed before and after the emergence of the plastic zone in surrounding rock.

The supporting forces of deep tunnels are obtained by assuming that the weak contact satisfies the rigid-plastic and Mohr-Coulomb constitutive relationships respectively.

In view of deep and complicated roadways in coal mines,the bolting mechanism was analyzed,the high pretensioned stress and intensive supporting theory was put forward.

A study on the limit support pressure at excavation face of shield tunneling;

Analysis of cutting face support pressure for earth pressure balance shield tunneling

Using the theory of Terzaghi s relation soil pressure,the limited support pressure formula with tunnel face in stratified sandy soil is .

the shape coefficient formed according to different excavation area should be adopted properly, but also the man-made resistance of support during excavation should be taken into account specially.

Modeling of support resistance in roadside packing for retaining entry along gob-side;

Based on theoretical analysis and numerical calculation, the role of support resistance in roadway de formation controlling was discussed.

Based on the field investigations, this paper illustrates the quantitative relation between the amount of surrounding rock deformation and support resistance of roadway in soft rock.