Kratkovskyi I., Minieiev S., Riumina D., Kuttybayev A. Drilling and blasting procedures optimization to obtain conditioned mining mass in the variable strength monolithic limestones extraction
- Details
- Parent Category: Geo-Technical Mechanics, 2025
- Category: Geo-Technical Mechanics, 2025, Issue 174
Geotech. meh. 2025, 174, 179-190
DRILLING AND BLASTING PROCEDURES OPTIMIZATION TO OBTAIN
CONDITIONED MINING MASS IN THE VARIABLE STRENGTH MONOLITHIC LIMESTONES EXTRACTION
1M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine
2Mining and Metallurgical Institute named after O.A. Baikonurov, Almaty, Kazakhstan
UDC 622.235.5
Language: English
Abstract. An expert assessment of the drilling and blasting works actual parameters compliance with the standard blasting project at the Verbka-Pivdenna quarry in the Khmelnytskyi region was carried out. It was found that the actual parameters of drilling and blasting work partially do not correspond to those proposed in the “Standard Project for Blasting Works Using the Method of Borehole and Burrow Charges at the Verbka-Pivdenna Quarry.”
In this regard, ways of adjusting the actual blasting operations parameters in accordance with the standard project, taking into account the strength properties and limestone structure, are indicated. In particular, it is proposed to assess the limestone fracturing influence on the explosion destruction nature, as well as to clarify their strength according to the M.M. Protodiakonov scale for individual sections of the massif, since these rock properties significantly affect its fragmentation. This will make it possible to carry out a scientifically based calculation of the specific explosives consumption used for crushing limestone and obtain the required the rock mass crushing quality at the Verbka-Pivdenna quarry.
To achieve high-quality explosive preparation of crushed rock mass in isotropic monolithic rocks, such as limestones, a good result is provided by the use of a checkerboard drilling grid on the blasting block and switching of downhole charges according to a diagonal scheme. The use of such a scheme for connecting explosive charges significantly reduces the oversized fractions volume due to a reduction in the spall cracks number and ensures more uniform crushing of the rock by explosion.
It is necessary to adjust the borehole charges location in the increasing its area direction. This will ensure a reduction in the specific explosives consumption used to destroy the massif and, as a result, reduce the destroyed rock re-crushing.
In the future, the results of this work should be used to develop adjusted parameters for drilling and blasting operations at the Verbka-Pivdenna limestone quarry, which will allow achieving high quality crushing and the required condition of the blasted rock mass.
Keywords: drilling and blasting, limestone, typical project, fracturing, quality of grinding, geological structure, rock strength.
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About the authors
Kratkovskyi Ihor, Candidate of Technical Sciences (Ph.D), Senior Researcher, Department of Geomechanical Foundations of Open Pit Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. (Corresponding author), ORCID 0000-0003-3333-8633
Minieiev Serhіi, Doctor of Technical Sciences (D.Sc.), Professor, Head of Department of Pressure Dynamics Control in Rocks, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0000-0002-4594-0915
Riumina Daria, Doctoral Student, Department of Geomechanical Foundations of Open Pit Mining Technology, M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine (IGTM of the NAS of Ukraine), Dnipro, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. ORCID 0009-0005-2502-1144
Kuttybayev Aidar, Professor of the Mining Department of the O.A. Baikonurov Mining and Metallurgical Institute, Almaty, Kazakhstan, a.kuttybayev@satbayev.university ORCID 0000-0003-3997-8324