Title: Analysis of the complex functions of the surrounding rock stress field in the elastic circular tunnels
Abstract:The paper intends to introduce an analysis of the complex functions of the surrounding rock stress field in the elastic circular tunnels. The said analysis has been done in hoping to find the distribu...The paper intends to introduce an analysis of the complex functions of the surrounding rock stress field in the elastic circular tunnels. The said analysis has been done in hoping to find the distribution features of the elastic stress of the surrounding rock in the horizontal line with the complex function method for the analysis,which can help to get the analytical expression of stress field almost in the same way as the stress function method.Thus,it can prove that it would be feasible to use the complex function method to solve the surrounding rock stress field. What is more,by analyzing the boundary stress distribution regulation of the circular roadway of the surrounding rock stress distribution features horizontally,we can arrive at the following conclusions:( 1) The hoop stress concentration factor changes with the side pressure coefficient,whereas the position and the angle has nothing to do with the radius on the condition that the radial stress and the shear stress of the circular roadway boundary are equal to 0.And,( 2) The radial and hoop stress concentrations change with the side pressure coefficient and roadway radii,when the shear stress of the circular roadway surrounding rock in the horizontal direction is equal to 0. And,( 3) in the horizontal direction,if the impact of the surrounding rock radial stress on the side pressure coefficient is greater than the hoop stress,it would be of great need to analyze the impact of different side pressure coefficients on the surrounding rock stress. Besides what is said above,we have also made a discussion on the circumferential boundary stress distribution in the above said four cases and found that the lateral pressure coefficient should also be equal to zero,greater than zero,less than 1,equal to 1 and greater than 1,which helps to determine the tension and the compression of the hoop stress and the effect of the maximum hoop stress concentration factors on the tunnel boundary. Thus,it can be concluded that the paper has provided a theoretical basis for predicting the deformation and breakage of the roadway surrounding rock stress.Read More
Publication Year: 2015
Publication Date: 2015-01-01
Language: en
Type: article
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Cited By Count: 2
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