Numerical simulation of the influence of fracture dip angle and density on the rockburst tendency in the deep mine

The engineering rock mass is a discontinuous medium body composed of joints, cracks and other structures.The deep roadway is in a complex engineering environment with high ground pressure and strong disturbance.The rockburst tendency of the fractured rock mass is an important subject for the safety and stability research of the deep engineering.By means of numerical simulation, the energy and strength characteristics of rock masses with different fracture occurrence are analyzed through uniaxial compression test.The test results show that the fracture weakens the mechanical parameters of rock masses, and the fracture dip angle and fracture density are important indicators affecting the strength and bursting liability of rock masses.The larger the fracture dip angle is, the higher the elastic strain energy stored by the rock mass is, and the greater the possibility of rock burst is.The fracture density has little effect on the elastic strain energy of the fractured rock mass, and the bursting liability of the fractured rock mass is mainly affected by the fracture dip angle.The research results provide a scientific basis for the rock burst prediction of deep engineering fractured rock mass.