Numerical Simulation Research On The Deformation Characteristic Of Laneway And The Evolution Discipline Of Working Load In Rock Bolt

With the rapid development and wide application of the underground excavation, evaluating the security of the stability of the underground roadway has become an important subject in the circle of rock and underground engineering. Based on the present theory of rock bolt supporting, this thesis employs the method of numerical simulation to study the deformation characteristics of laneway and the evolution discipline of working load in rock bolt. It also tests and proves the reliability and feasibility of the method of valuing the stability of laneway based on the nondestructive testing of bolt working load.This thesis discusses the very relation between the working load of bolt and deformation of underground roadway under different ground stresses. Numerical model is set up through the application of the commercial software ANSYS, under the theory of the interactivity mechanism of bolt and underground surrounding rock and in accordance with suitable stress and strainrelationship of rock material and special boundary conditions. In this thesis, the variation disciplinarian of the stress and strain in the wall rock and variation information of working load of bolt under different ground stress is analyzed, through emulating the whole process of excavating, supporting, losing its balance and destructing of the laneway under different ground stress so as to research the evaluation disciplinarian of the deformation characteristics of the wall rock and the working load of bolt.The correspondence relationship between the working load of bolt and deformation of underground roadway under different ground stress is acquired through the comparison and analysis of the experimental results of simulation and the calculating results of numerical simulation. It further tests the reliability and feasibility of the method of valuing the stability of laneway based on the nondestructive testing of bolt working load.By real-time monitoring the bolt working load and with the study of stability of wall rock and structure, we can instantly judge and analyze the stability of wall rock and its supporting structure so as to provide reliable help for bettering road lining and strengthening.