Belgorod State University, Belgorod, Russia

V. N. Tyupin, Professor, Doctor of Engineering Sciences, tyupinvn@mail.ru

A topical and large-scale task of the present day is the evaluation of a threshold depth below which mining should be assumed as hazardous operations by the criterion of rockburst hazard. From a certain threshold depth downward, the material and financial expenditures of mining companies in pursuit of mining safety and efficiency begin to grow. The author has performed the analytical research which made the framework for the threshold depth formula with regard to the strength properties of rocks (ultimate compressive and tensile strengths) and Poisson’s ratio. The validity of the formula is proved by the comparison of the calculated data with the actual threshold depths at mineral deposits in Russia and in Soviet Union. The formula of the threshold mining depth by the rockburst hazard is recommended for the preliminary calculations at the stages of exploration and mine planning and design.

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