This article examines the seismic effects of blasting operations on protected structures, highlights the importance of this factor for ensuring occupational safety at mines, and reviews advances in predicting the magnitude of seismic effects. The relevance of applying two classical formulas, Sadovsky’s formula and the USBM formula, is substantiated for predicting the parameters of blast-induced ground vibrations. As the problem of classifying blasting operations according to their seismic effect has already been solved using Sadovsky’s formula, the present study addresses a similar classification problem for the USBM formula, given its widespread use in international practice. The problem was solved based on a statistical analysis of paired values of the seismic coefficient and attenuation exponent for blast-induced ground vibrations, compiled from open literature sources. For the first time, the attenuation exponent is shown to follow a normal distribution, while the seismic coefficient follows a lognormal distribution; the key parameters of these distributions are also estimated. A classification criterion is proposed for explosive seismic sources based on their seismic impact level, distinguishing between high and low seismic effects. The statistical significance of the paired regression is evaluated, leading to the conclusion that the coefficients in the classification criterion are statistically significant. Challenges associated with classifying explosive seismic sources by seismic impact level are discussed for both the USBM and Sadovsky’s formulas. Practical examples are presented to demonstrate the application of the proposed classification for the comparative assessment of seismic effects generated by different explosive sources. Directions for further research are also outlined.
The experience of drilling and blasting operations at limestone quarries in Finland is described. The comparative characterization of drilling and blasting parameters, adopted for similar conditions in Russia and Finland, is carried out. The problems inherent in explosive mining of construction materials in Russian quarries are defined. The directions for improving the parameters of drilling and blasting operations are outlined, which will improve the quality of blasting preparation.
The problems of seismic impact of explosion on a tunnel are characterized. A methodology for determining the parameters in Sadovsky's formula for seismic wave displacement velocities based on the results of measurements at one point of the velocity time histories of seismic oscillations from subsequent short-term delayed explosions is proposed. The correlation between the parameters is established. The influence of errors in the determination of parameters on the calculation of seismically safe mass of the explosive charge is estimated.
The subject of the research was the state of safety of buildings of engineering structures and the environment, located in the zone of influence of mining operations, under the influence of seismic and shock air waves from the production of blasting operations. In the research work full-scale measurements of arguments of seismic and shock air waves in the requirements of production of mass explosions and lump crushing at different blasting schemes both on mining and geological and meteorological requirements were carried out. Optimal requirements to the organization and production of blasting operations are proposed.
The object of the research is the state of safety of buildings of engineering structures and the environment, located in the zone of influence of mining operations under the influence of seismic blasting and shock air waves from blasting operations. Full-scale measurements of parameters of seismic blasting and shock air waves during mass blasting and oversize crushing with various blasting schemes in various mining and geological and meteorological conditions have been carried out. Optimal conditions for organization and production of blasting operations are proposed.