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                                                                                                                                        Ukr  Eng             Íàçàä

 

 

Rational parameters of drilling-and-blasting operations for rise working

M.M. Kononenko1*, O.Ye. Khomenko1, A.V. Kosenko

1Dnipro University of Technology, Dnipro, Ukraine

2Branch for Physics of Mining Processes of the M.S. Poliakov Institute of Geotechnical Mechanics of the National Academy of Sciences of Ukraine, Dnipro, Ukraine

*Corresponding author: e-mail: kmn211179@gmail.com

 

Physical and technical problems of mining production, 2022, (24), 15-31.

 

https://doi.org/10.37101/ftpgp24.01.002

full text (pdf)

 

ABSTRACT

 

Purpose. Development of a methodology for calculating the parameters of drilling and blasting (D&B) for rise working methods of borehole and blast-hole charges, taking into account the diameter of the charge, the detonation characteristics of explosives (EX), the physical and mechanical properties of rocks, their fracturing and compaction under the action of rock pressure.

Methods. The work uses a comprehensive methodological approach, including the development of a methodology for determining the parameters of the (D&B), taking into account the diameter of the (EX), the strength of the rocks in compression, the coefficients of structural weakening and compaction under the action of rock pressure.

Findings. A new method has been developed for calculating the rational parameters of (D&B) when conducting rising ones, in which the distance between borehole or blast-hole in a cut is determined by the radius of the shear zone, and for contour ones – by the radius of the zone of intensive crushing.

Originality. The parameters of the location of borehole or blast-hole in the raise face are implemented according to the power-law dependence of the change in the line of least resistance (LLR) depending on the diameter of the charge, detonation characteristics of the (EX), physical and mechanical properties of rocks, their fracturing and compaction under the action of rock pressure.

Practical implications. The use of a new method for calculating the rational parameters of (D&B) for rise working make it possible to rationalize the location of borehole or blast-hole in the raise face, which will lead to resource saving during their sinking.

Keywords: borehole, blast-hole, explosive, drilling and blasting, zone of intensive crushing, line of least resistance

 

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