Rock bursts due to gas explosion in deep mines based on hexagonal and boundary elements.

The assessment of bumps occurrence in deep mines, which, for example, can occur during longwall mining, belongs to the most serious tasks for mining engineers since its consequences are commonly fatal. Aftermath of underground gas explosion on the bumps appearance at its early stage will be discussed. Discrete element method – hexagonal particles – is used in combination with boundary elements involving dynamical effects is the numerical tool for describing this phenomenon. Eigenparameters simulate the explosion. Some numerical examples show the ability of the method for applications to practice.