Revisiting the strainburst intensity of roadways in coal mines: Theory and case study

Strainburst is a type of severe dynamic hazard frequently encountered in underground excavation, involving violent rock ejection. It is caused by the release of elastic strain energy stored in the surrounding rocks. Hence, the burst energy criterion is crucial for evaluating the strainburst intensity. In this study, using a damage model of roadway strainbursts, a new critical energy storage density index for strainburst initiation was proposed, and a novel assessment criterion for the bursting intensity of strainburst-prone roadways was established. The results showed that an increase in coal brittleness results in decreases in critical stress of the strainburst and bursting intensity of the surrounding rocks.…

• NN
  National Natural Science Foundation of China

  Award: 52304133
• CF
  Center for Autonomous Systems and Technologies

  Award: 2024QNRC001