Accurately understanding the instability mechanisms of surrounding rock in deep hard rock roadways is of great engineering significance for the design of roadway support parameters. Taking the kilometer-deep marble roadways at the Jinchuan mine as the research object, a self-defined heterogeneous material program was developed based on the voronoi joint network and Weibull distribution function built in RS2 using the continuous-discontinuous numerical simulation method. A heterogeneous-joint finite element model for the rock and rock mass was established, the deformation parameters and mechanical parameters of marble were calibrated, and the deformation and failure law of deep hard rock was revealed. Meanwhile, considering the joint characteristics of the surrounding rock in the roadway, a heterogeneous-joint finite element model for the roadway was constructed, which reproduced the failure characteristics of deep hard rock roadways. A local support scheme was proposed to address the failure laws of unsupported roadways. The study indicates that the rock and rock mass models constructed based on the heterogeneous-joint finite element method can effectively characterize the deformation and failure laws of deep hard rock. The simulation results of the heterogeneous-joint finite element roadway model are consistent with the the field roadway damage, thereby validating the rationality of this method. Compared with the unsupported condition, the maximum depths of the plastic zones in the left and right ribs of the roadway were reduced by 62.9% and 58.0% respectively after the application of the local support scheme, the numbers of block and joint failures decreased by 83.0% and 74.5% respectively, and the maximum deformation of the roadway was reduced by 33.8%, which verifies the reliability of the local support scheme. The research results provide a reference for the analysis of failure characteristics of surrounding rock in deep hard rock roadway, and expand the idea of deformation control of surrounding rock in deep hard rock roadway.