Analysis on Structural Stability and Application of U-steel Support Used in High-stress Soft Rock Roadway
WANG Yunchen
WANG Bo
ZHANG Hongxue
Abstract：In order to solve the support problem of soft rock roadway in structural stress field, analysis was made on the formation characteristics of the soft rock roadway, the influence of the axial force on the bending deformation was taken into consideration, and the analytical solution of the dangerous sections of the U-steel support was obtained. On this basis, the technology of side protection and roof control was proposed and the dangerous sections of the U-steel support were reinforced with this technology. The theoretical analysis showed that the dangerous section of the U-steel support depended to the section area of the support, the moment of inertia, the sectional dimensions and side pressure coefficient of the roadway. The engineering practice showed that using the side protection and roof control technology to reinforce the dangerous section of the U-steel support can improve the bearing capability and stability of the support, achieve the coupling of the support system and rock mass in their strength, stiffness and structure, and ensure the stability of the roadway.
Keywords：structural stresssoft rock roadwayU-steel supportlateral pressure coefficientside protection and roof control technology
Publication Date：2015-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：5( 76-80 )