Evaluation of the rockburst proneness of red sandstone with prefabricated boreholes: an experimental study from the energy storage perspective

To reveal the function of drilling pressure relief (DPR) in preventing rockbursts from energy storage perspective, we investigated rockburst proneness red sandstone with different number and arrangement prefabricated borehole via uniaxial compression tests. The experimental result revealed failure intensity characteristics specimen can be quantitatively described using peak-strength strain index (PESI). PESI specimens boreholes decreased by 23.2%–70.2% compared that intact specimens, i.e. DPR effectively reduce rocks. Furthermore, effects on were evaluated. as increased. When angle loading direction changed 90° to 27° then 0°, first increased; when was 27°, efficiency eliminating weakening peak strength best. affects more than does. This paper offers a novel approach evaluating rocks after clarifies effectiveness reducing probability rockbursts.