Rock is a complex material to simulate numerically, especially due to the presence of rock joints and fractures. Pre-existing rock fracture present plays an important role in the overall strength deformation characteristics in the rock mass. In order to model fracture numerically, there are several explicit and implicit models developed, and researchers have tried to model the fracture and study it mostly in continuum methods. The literature with a discontinuum approach for fracture growth in rocks is very limited. In the present study, fracture modelling and their growth are simulated using a discontinuum approach, with Particle Flow Code (PFC). PFC works on the interaction between particles, and there are several contact bond models available, which have their own advantages and disadvantages. If the contacts are established without bonds, the complexity of the rock can’t be captured. Therefore, a bonded contact model is used, and the advantage of the parallel bond model over other models is that both force and moment can be transmitted between particles. FLAT jointed model is used by mimicking the microstructure of angular, interlocked grains to systematically validate with the laboratory experimental results. This paper provides a complete description of the modelling process and systematic validation of rock fracture initiation, propagation and growth of the FLAT jointed model in PFC. The discrete element model with PFC was found to be efficient in capturing crack growth, compared well with the laboratory experiments.