The energy of the shock wave of HC in rocky rocks is much greater than the energy of the shock wave in water. In a number of rocky rocks it is 80% or more of the potential energy of the charge.

The Vivikond open pit mine uses a non-transportation system of mining. Overburden rocks - peat, sands, loams and clays with an average thickness of 5 m and limestone with an average thickness of 8 m are moved by excavators ESH-10/60, ESH-15/90 and excavator EKG-4,6 into the excavated space at a distance of 40 m.

Achieved successes in the technique and technology of development of mineral deposits have created the necessary prerequisites for the transition to the stream, more progressive technology of mining operations in strong rocks. ...

The problem of studying physical phenomena during an explosion is currently very relevant. Some explosion processes have such short durations that only electronic equipment can detect them. The presence of a pronounced piezoelectric effect in some crystals, as well as in all ferroelectrics, makes it possible to develop low-inertia methods for measuring pressures, including shock wave pressure. Piezoelectric sensors have been used to study shock waves both here and abroad...

It is known that in the near zone of the explosion is spent a significant part of the energy of the explosive charge. Determination and calculation of energy expenditure in this zone are important because they make it possible to control the action of the explosion. In this paper, two methods of determining the energy expenditure are considered - calorimetric and computational-experimental. The calorimetric method considered here, in contrast to the existing ones, is developed for rocks and makes it possible to determine the energy expenditure for the formation of the free surface and to estimate the energy expenditure in the near zone (plastic deformation zone). The computational-experimental method is based on the determination of shock compressibility of rocks and requires the use of relatively complex equipment, either a high-speed photoregister to determine the speed of propagation of the shock wave, or piezometric sensors and cathode oscilloscopes to measure high pressures ...

The study of the regularities of wave propagation excited by explosion in rocks is of great importance in various fields of science and technology. Studies have established that they play a significant role in the general process of hard rock destruction. However, a rigorous theoretical consideration of this issue presents enormous difficulties.This paper presents some qualitative and quantitative results of the experimental study of the patterns of propagation of stress waves in hard rocks caused by the explosion of a charge of spherical shape. On the basis of generalization of experimental data and some theoretical assumptions, approximate empirical dependences are obtained, which allow to calculate their main parameters.