Rationale for seismic safe parameters of explosions in underground mining of the near-surface reserves of the field under urban development
The article provides the main results of the rationale for the seismic safe parameters of explosions in underground mining of the near-surface deposit reserves under urban development using chamber system of mining with a hardening filling with the preservation of residential development and the social factors. Methods of rationale for the coefficient of attenuation of seismic vibrations from the charge to the protected object, as well as the coefficient of proportionality characterizing the environment conducting seismic vibrations are described. It is shown that the efficiency of the screening effect of worked-out area of a chamber is determined by the coefficient of the screening adaptation, which is numerically equal to the ratio of the observed speed of fluctuations in the diffracted wave to the speed in the direct wave. The maximum value of the coefficient of screening of the worked-out area of the chamber on the speed of displacement of the mass by the experimental data did not exceed 0.47.