Bolts 2 Coal mines 2 Concrete construction 2 Deep tunnels 2 Distinct element methods 2 Grouting 2 Kinetic energy 2 Kinetics 2 Loading system 2 Local mine stiffness 2 Method model 2 Mortar 2 Numerical methods 2 Numerical models 2 Resins 2 Rockbolts 2 Rocks 2 Stiffness 2 Strainburst 2 Underground coal mine 2 Underground mining 2 Yielding rockbolt distinct element method 2 local mine stiffness 2 numerical modeling 2 strainburst 2 underground mining 2 yielding rockbolt 2