Adopting similar material simulation test and numerical simulation methods

the impact damage process of coal roadway under anchor bolt

U-steel and energy absorbing support are studied. The impact failure mechanism of roadway under interaction between coal and support is received. Similar material simulation and numerical results show that the impact damage laws under different support types are consistent with each other. Under impact loads

the roof sinks significant

the floor drum obvious

and the both sides have a large internal deformation; cracks expansion and through

even the coal thrown out. According to similar material simulation test and calculation results

it is shown that for different support types

different levels of impact damage

energy absorbing support has good cushioning and energy absorption characteristics

and advantages of small deformation and good stability. The test results also indicate that the energy absorbing support is better for rockburst roadway.