Research of Bearing Mechanism of Double Support Structure of Deep Soft Rock Roadway

摘要

the stabilization of the rock support structure is the key to the safety and stability in the deep soft rock roadway, According to the bearing characteristics of surrounding rock, this paper puts forward the definition of double bearing structure, using FLAC3D numerical simulation software and theory of mechanics analyses Bearing Mechanism of Double Support Structure.the research shows: Excavation of soft rock roadway, the vertical strain and horizontal strain of the surrounding rock of roadway has wave, the surround rock appearing obvious deformation and displacement of roadway roof and floor in 3M, and the roadside appearing extrusion failure in the range of 2m. The roadway is more stable as the figure of the plastic radius is smaller, the same to outer bearing structure's boundary and the width of outer bearing structure and plastic zone.