| Issue |
E3S Web Conf.
Volume 192, 2020
VIII International Scientific Conference “Problems of Complex Development of Georesources” (PCDG 2020)
|
|
|---|---|---|
| Article Number | 01024 | |
| Number of page(s) | 7 | |
| Section | Geotechnical and Geomechanical Problems of Development of Mineral Resources | |
| DOI | https://doi.org/10.1051/e3sconf/202019201024 | |
| Published online | 30 September 2020 | |
Features of schemes of the explosive loosening, with big slowdowns
1
Pacific State University, Chair of Transport and Technological Systems in Construction and Mining, 680035 Khabarovsk. Russian Federation;
2
“AVT-Amur” Limited Liability Company, 675000, Blagoveshchensk city, Russia
* Corresponding author: 000399@pnu.edu.ru
The task of the article is to determine the influence of the blasting charge power on the intensity of preliminary destruction of the blasting block mass at long delays. Increase of the destruction radius r from the blasthole charges action at diagonal pattern of hole-by-hole blasting, caused by change of explosive charge energy or rock properties, decreases the number of stress waves passing in the vicinity of specific blast holes. They cause the rock disturbance in the pre-destruction area due to increasing of explosion energy absorption in the area of blasthole charges destruction. However, at the same time, the value of the predestruction factor increases. The calculation shows that 3.5 times increase of the blasthole charge destruction radius, reduces in 1.36 times the number of stress waves passing through the vicinity of specific blasthole charges, but the factor of pre-destruction intensity increases tenfold and the total impact of these factors – by a factor of 8.
© The Authors, published by EDP Sciences, 2020
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