Numerical analysis on support structure of rock around deep roadway

The stabilization of the rock support structure is the key to the success in the deep roadway supporting process.Numerical simulations of the deep roadway were carried out through application of the strain-softening constitutive model.Differences between the deep and shallow roadways of the rock support structure were analyzed.Influences of the support resistance on the rock support structure at the deep roadway were discussed.It was shown that there was alternation of strong and weak strength-softening region in the surrounding rock of deep roadways.However,the increase in the support resistance cut down the size of strength-softening region of surrounding rock,decreased its strength-softening degree,and improved the stress distribution condition of the surrounding rock mass.It was concluded that the support resistance would raise the self supporting ability of surrounding rock through controlling its strength-softening so as to make the rock support structure of deep roadways stable.