In the process of deep coal mining, when the rock mass near the roadway contains some discontinuities such as joints and faults, how to ensure that the support design of the roadway can meet the stability of such jointed rock mass is very important.
This paper mainly uses the numerical simulation method to analyse and study the support performance of jointed rock roadway. In this study, the geological model and support system of jointed rock roadway are simulated by using the bonded block model and mixed anchor member (simulating shear action) in 3DEC software. These models can well invert and understand the instability and failure process of roadway support system in jointed rock mass, and can also evaluate whether the current support system can meet the needs of mining safety production in the future. The simulation results show that the bolt in the original roadway support system is mainly broken and unstable under the high-level shear force of the joint, which leads to the instability and failure of the whole roadway. If the support components with stronger deformation coordination ability and lower yield strength or the support components with lower deformation coordination ability and higher yield strength are used to replace the original support system, the support effect will be significantly improved and the surrounding rock of the roadway will be stable. The research results of this paper have good guiding significance for the support design and optimization of jointed rock roadway under deep similar conditions.
 

Jointed rock roadway, Bonded block model, Hybrid bolt components, Support design