Study on the Influence Mechanism of Asymmetric Deformation of Deep Inclined Rock Roadway
In order to study the influencing factors and mechanical mechanisms of asymmetric deformation in deep inclined rock roadway,a 45° inclined rock roadway calculation model was established using FLAC3D finite difference numerical software,with a horizontal development roadway at a depth of-1 000m in Qishan Mine,Xuzhou Mining Area as the engineering background.The general laws of deformation and failure of the surrounding rock of the roadway and the mechanical mechanism of crack formation were ob-tained by combining with geological mechanics models.The results show that:1)The surrounding rock mass of the 45° inclined rock layer roadway exhibits asymmetric deformation and failure on both sides of the roadway due to insufficient shear stiffness;2)The asymmetric deformation of deep tunnels is mainly caused by the normal compression effect of high ground stress on the structural planes,which leads to the expansion of weak rock layers,and the tangential shear slip caused by the dip angle of rock layers on the interlayer structural planes,both of which exhibit asymmetric deformation of rock structures;3)By com-paring and analyzing the total displacement contour map in the numerical model with the crack direction in the geomechanical model,it was found that the shear type crack propagation and penetration on the left side of the roadway roof are the main reasons for the failure of the roadway surrounding rock.
deep roadwayasymmetric deformation45° inclined rockhigh ground stress
万方数据
维普
