Improving the production technology of drilling and blasting operations by blasting of high ledges

In modern economic conditions, the issue of improving the efficiency of mining enterprises is very relevant. One of the key processes isdrilling and blasting operations (DBO), which determine the efficiency of the entire complex of mining operations. One of the main methods of controlling the explos...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-11, Vol.966 (1), p.12022
Main Authors: Ugolnikov, N V, Domozhirov, D V, Karaulov, N G, Prochorov, A A
Format: Article
Language:English
Subjects:
Blasting (explosive)
Compressive strength
Control methods
Drilling machines (tools)
Economic conditions
Expanders
Explosions
Ledges
Protodyakonov index
Rocks
Wells
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Summary:In modern economic conditions, the issue of improving the efficiency of mining enterprises is very relevant. One of the key processes isdrilling and blasting operations (DBO), which determine the efficiency of the entire complex of mining operations. One of the main methods of controlling the explosion energy is the diameter of the blast wells. According to the recommendations of prof. B N Kutuzov the diameter of blast wells is correlated with the fracturing and strength of the exploding rocks. With increasing blockage and rock strength to achieve the required quality of explosive crushing preference is given to drilling equipment with a small diameter of wells. By blasting of high ledges, especially large-block rocks with a strength coefficient of more than 15 on the M M Protodyakonov scale; the use of high-performance drilling equipment for drilling small-diameter blast wells is difficult. This is due to the fact that the calculated value of the resistance line along sole (RLAS) does not pass the safety condition for drilling the first row of wells. In this regard, the paper proposes and justifies the use of extensions of the lower parts of wells using mechanical expanders.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/966/1/012022