Abstract：On the basis of dynamic disaster characteristics induced by deep mining and the advantages and disadvantages of energy-releasing bolts，a novel kind of J energy-releasing bolts consisting of anchorage(damping) module，deformation module，blending section and anchorage section was developed，and static pullout model and dynamic impact consititive model of J energy-releasing bolts were established. The dynamic impact consititive model consists of spring and damping elements in parallel. Given an initial dynamic impact load，the oscillation amplitude of J energy-releasing bolts will quickly attenuate along the bolt axial impact direction with increasing the damping ratio，that is，the greater the damping effect of J energy-releasing bolts，the more quickly the dynamic impact energy releases. The static pullout test and the dynamic impact test of J energy-releasing bolts were done in the Candian CANMET laboratory. The experimental results show that the static pullout load is greater than 190 kN，and that the bolt can not only allow large sliding displacement but also provide a large constant anchorage force under static pullout condition. Under multiple dynamic impact loading condition，the peak load of J energy-releasing bolts exceeds 250 kN every time. The release energy of J energy-releasing bolts exceeds 19.3 kJ under one time dynamic impact condition and the total energy release capacity reaches 46.5 kJ，which shows that J energy-releasing bolts can bear multiple dynamic impact loading and the energy release capacity is stable. Due to the objective existence of joints in rock mass，the energy-release bolted rock mass can generate dilatation and tensile failure in the joint surface of rock mass under dynamic impact condition such as rockburst etc.，but the support structure system in the surface of the tunnelling(stope) will not be damaged by the dynamic impact，which can effectively release the kinetic energy accumulated in the rock mass induced by high magnitude rockburst. The research can provide new support idea for preventing and controlling the mine dynamic hazards induced by deep mining.
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2020, Vol. 39 
