PROBLEMS OF THE ACTION MECHANISM OF THE EXPLOSION OF THE NEW DESIGN OF THE BOREHOLE CHARGE
DOI:
https://doi.org/10.25635/2313-1586.2023.02.041Keywords:
blasting, geomechanics, borehole charge design, combined field development, seismic safety, fracturing, explosive energy intensityAbstract
The technology of blasting in this study is related to the issue of the mechanism of explosion of one of the structures of the borehole charge, the conditions for its conduct, the corresponding explosives and the performance of experimental explosions during combined development of deposits. In the mining industry, a combined method of developing mineral deposits, including underground and open-pit operations, is very promising. Such development makes it possible to intensify mining operations at the explored fields and significantly improve the technical and economic indicators of production, makes it expedient to develop a number of fields that are considered inefficient today. Certain features characterize the joint application of two development methods at one field. Not only the final results of mining the entire field depend on blasting operations here, but also the indicators of open (when refining the lower horizons) and underground works (especially on the first horizons).
Thus, a very important problem with the combined method of developing mineral deposits is the peculiarities of conducting drilling and blasting operations at quarries and sections that affect the safety of mine workings and directly on seismic safety. There is a need to protect both underground mine workings and various mining facilities located nearby.
To solve the problem of ensuring the stability of such objects, it is necessary to study theoretically and experimentally and generalize some aspects of technologies and their parameters, which determine, in particular, the degree of participation of seismic impact for the development of effective methods and means of blasting. The performed seismic studies are supplemented by the results of calculations carried out by the method of smoothed particles (SPH). In this regard, the actual scientific and practical interest is the study of the characteristics of the dynamics of explosive impact with certain technologies of field development, which is what this article is devoted to.
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