| Issue |
E3S Web Conf.
Volume 192, 2020
VIII International Scientific Conference “Problems of Complex Development of Georesources” (PCDG 2020)
|
|
|---|---|---|
| Article Number | 01017 | |
| Number of page(s) | 7 | |
| Section | Geotechnical and Geomechanical Problems of Development of Mineral Resources | |
| DOI | https://doi.org/10.1051/e3sconf/202019201017 | |
| Published online | 30 September 2020 | |
About the effectiveness of counter blasting with chamber mining system
Institute of Mining of the Ural branch of the Russian Academy of Sciences, Laboratory of Underground Geotechnology, 620075, Ekaterinburg, Russia
* Corresponding author: geotech@igduran.ru
When underground mining of Ural copper deposits with a chamber mining system, an urgent scientific and practical task is to increase the productivity of loadingdelivery machines for the ore drawing from secondary chambers. The technogenic disturbance of the massif of such chambers in combination with the non-alternative use of a blasthole ring scheme of breaking leads to an increased output of oversized fractions. With an increase of oversized ore output, operating costs for the drawing and delivery of ore increase, tire wear, fuel and lubricants consumption increases. In this article, the possibility of reducing the oversize ore output in secondary chambers by using counter blasting of the breaking layers is considered. As a result of the research, the parameters of effective counter blasting with blasthole ring charges were established, namely, the distance between the working faces in the chamber, the angle of ore pieces meeting and the line of least resistance.
Key words: Copper ore / counter blasting / oversized ore / blasthole ring charges / line of least resistance
© The Authors, published by EDP Sciences, 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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