A large number of energy can be released in coal bumps.In order to quantitatively calculate energy released amount, the uniaxial compression single-pressure experiment of coal briquette model was carried out, and the ejection velocity of coal pillar in damage was measured by the high-speed photography to obtain energy release situation in failure of coal pillar.In addition, the amount of energy release is calculated by finite element method before and after destruction of the model.Taking into account a certain proportion of energy dissipation, the theoretical ejection velocity of coal pillar can be calculated by energy conservation principle, and the theoretical value is in good agreement with the measured value.Finally, this paper proves that the ejection velocity of coal fragments in failure measured from experiment is the same as the ejection velocity in failure from engineering practice.
