Rock jetting performance with solid particles of different sizes in hydraulic monitor jet

Rock jetting methods are often applied to develop clay deposits. Mines in Russia currently use the recycling scheme of process water supply from settling ponds. However, fine fractions of host rocks settle very slowly in the settling ponds and inevitably get in recycled process water; moreover, the content of such particles increases over time and reaches substantial values by the end of the flushing season. Laboratory experiments aimed to determine the effect exerted by the content of different-size solid particles in the hydraulic monitor jet on the jet performance have shown that the content of solid particles (clay fractions with a size of 0.005 mm) from 0 to 100 g/l in process water can increase the jetting performance by 1–10%. Solid particles from 1.5 to 4.1 mm in size in the hydraulic monitor jet make it possible to triple rock jetting performance (which corresponds to the solid particle content of 6.5 g/l in the jet). Technologically, these experimental results are applicable in hydraulic mining with the recycling scheme of water supply from settling ponds (for solid particles with a size of up to 0.005 mm) and in rock jetting with cocurrent or side face (for solid particles from 1.5 to 4.1 mm in size).

Shkaruba N. A., Kislyakov V. E., Nikolaeva N. V., Katyshev P. V., Teshaev U. R. Rock jetting performance with solid particles of different sizes in hydraulic monitor jet. MIAB. Mining Inf. Anal. Bull. 2021;(11):37-44. [In Russ]. DOI: 10.25018/0236_1493_2021_11_0_37.

The study was supported by the Russian Foundation for Basic Research, Project No. 19-35-90112.

N.A. Shkaruba¹, Cand. Sci. (Eng.), Assistant Professor, e-mail: nshkaruba@sfu-kras.ru,
V.E. Kislyakov¹, Dr. Sci. (Eng.), Professor,
N.V. Nikolaeva¹, Senior Lecturer,
P.V. Katyshev¹, Cand. Sci. (Eng.), Assistant Professor,
U.R. Teshaev, Cand. Sci. (Eng.), Assistant Professor, Civil Engineering and Architecture Faculty, Academician Osimi Tajik Technical University, Dushanbe, Tajikistan,
¹ Siberian Federal University, Institute of Mining, Geology and Geotechnology, Institute of Space and Information Technology, 660095, Krasnoyarsk, Russia.

N.A. Shkaruba, e-mail: nshkaruba@sfu-kras.ru.

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