Coal and rock fracturing by high-velocity water jets

This article describes the studies into hydraulic and hydroabrasive cutting of coal, rocks and other solid materials. The most wide-spread technique in this regard is the highpressure water jet slotting. Efficiency of rock cutting by a thin water jet is governed by the factor of slot depth. The hydraulic cuttability is represented by the hardness ratio and the temporal crushing strain of coal and rocks. It is possible to enhance the damaging capability of the high-pressure water jets by adding them with abrasive materials. The basic patterns and rational parameters of hydraulic and hydroabrasive rock cutting are found. The mathematical models of the cutting processes are constructed. The proposed design of a hydroabrasive cutting tool has a water channel of variable geometry to ensure the maximal damaging capability of hydroabrasive water jets and to make the tool adaptable to different secondary operations eventual in mining and construction. The hydroabrasive water jet cutting tool has successfully passed the lab-scale and full-scale testing.

Keywords: high-velocity water jet, solid material cutting, rock cuttability criterion, basic patterns, rational parameters, mathematical models of cutting processes, hydroabrasive tool, jetforming nozzles, variable water channel geometry.
For citation:

Merzlyakov V. G., Derevyashkin I. V., Boykova I. E., Tolmachev A. I. Coal and rock fracturing by high-velocity water jets. MIAB. Mining Inf. Anal. Bull. 2023;(4):140-156. [In Russ]. DOI: 10.25018/0236_1493_2023_4_0_140.

Issue number: 4
Year: 2023
Page number: 140-156
ISBN: 0236-1493
UDK: 622.232.5
DOI: 10.25018/0236_1493_2023_4_0_140
Article receipt date: 28.11.2022
Date of review receipt: 06.02.2023
Date of the editorial board′s decision on the article′s publishing: 10.03.2023
About authors:

V.G. Merzlyakov1, Dr. Sci. (Eng.), Professor, e-mail:,
I.V. Derevyashkin1, Dr. Sci. (Eng.), Professor, e-mail:,
I.E. Boykova1, Head of Laboratory, e-mail:,
A.I. Tolmachev, Cand. Sci. (Eng.), Assistant of Chair, Gubkin branch of National University of Science and Technology «MISiS», 309186, Gubkin, Russia,
1 Moscow Polytechnic University, 107023, Moscow, Russia.


For contacts:

V.G. Merzlyakov, e-mail:


1. Merzlyakov V. G., Baftalovskiy V. E. Fiziko-tekhnicheskie osnovy gidrostruynykh tekhnologiy v gornom proizvodstve [Physicotechnical elements of water-jet technologies in mining], Moscow, 2004, 645 p.

2. Talele S., Dalvi A., Rane G., Nawar J. Water-jet cutting — a precise method for manufacturing process. International Journal of Engineering Applied Sciences and Technology. 2020, vol. 4, pp. 471—473. DOI:10.33564/IJEAST.2020.v04i11.084.

3. Liu S., Chen J., Liu X. Rock breaking by conical pick assisted with high pressure water jet. Advances in Mechanical Engineering. 2014, vol. 2014, 10 p. DOI: 10.1155/2014/868041.

4. Brenner A. A., Zhabin A. B., Shchegolevskiy M. M., Polyakov Al., Polyakov An. Gidrostruynye tekhnologii v promyshlennosti. Sovershenstvovanie gidrostruynykh tekhnologiy v gornom proizvodstve [Water-jet technologies in industry. Improvement of water-jet technologies in mining], Moscow, Izd-vo «Gornaya kniga», 2010, 337 p.

5. Khachaturyan V. G. Razrushenie goryuchikh slantsev vysokoskorostnymi struyami vody po shchelevoy skheme [Destruction of oil shales by high-speed water jets according to a slit scheme], Candidate’s thesis, Tula, TulGU, 2016, 16 p.

6. 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, no. 11, pp. 37—44. [In Russ]. DOI: 10.25018/0236_1493_2021_11_0_37.

7. Merzlyakov V. G., Derevyashkin I. V. Application of water-jet technologies in mining. Technical opponent. 2022, no. 1(8), pp. 24—27. [In Russ].

8. Xiao S., Re Q., Cheng Y., Zhao Н., Cao Sh., Zhang L., Chen B., Meng X. Damage and fracture characteristics of rocks with different structures under high-velocity water jet impact. Engineering Fracture Mechanics. 2021, vol. 256, article 107961. DOI: 10.1016/j.engfracmech. 2021.107961.

9. Liu S., Liu X., Chen J., Lin M. Rock breaking performance of a pick assisted by highpressure water jet under different configuration modes. Chinese Journal of Mechanical Engineering. 2015, vol. 28, no. 3, pp. 607—617. DOI: 10.3901/CJME.2015.0305.023.

10. Brazhkin O. V. Obosnovanie parametrov gidroagregatnoy tekhnologii otrabotki krutykh plastov s ispol'zovaniem tyazhelykh sred [Substantiation of the parameters of the hydraulic aggregate technology for mining steep formations using heavy media], Candidate’s thesis, Moscow, MGGU, 2000, 24 p.

11. Golovin K. A. Ustanovlenie parametrov protsessa narezaniya shcheley v gornykh porodakh gidroabrazivnym instrumentom [Determination of the parameters of the process of cutting cracks in rocks with a hydroabrasive tool], Candidate’s thesis, Tula, TulGU, 1997, 18 p.

12. Merzlyakov V. G. Water-jet technologies in mining. Basic research findings. Mining equipment and electromechanics. 2018, no. 2, pp. 6—11. [In Russ].

13. Zhabin A., Polyakov A., Averin E. Experimental studies on cutting oil shale by highpressure water jets. Oil Shale. 2019, vol. 36, no. 1, pp. 32—42. DOI: 10.3176/oil.2019.1.03.

14. Stoxreitera T., Martinb A., Tezac D., Gallera R. Hard rock cutting with high pressure jets in various ambient pressure regimes. International Journal of Rock Mechanics and Mining Sciences. 2018, vol. 108, pp. 179—188. DOI: 10.1016/j.ijrmms.2018.06.007.

15. Zhabin A. B., Polyakov A. V., Khachaturian V. G. Investigation of the patterns of destruction of oil shales by high-speed water jets. News of the Tula state university. Sciences of Earth. 2016, no. 3, pp. 135—141. [In Russ].

16. Arab P. B., Celestino T. B. A microscopic study on kerfs in rocks subjected to abrasive waterjet cutting. Wear. 2020, vol. 448-449, article 203210. DOI: 10.1016/j.wear.2020.203210.

17. Huan Li, Zhongwei Huang, Jingbin Li Rock breaking characteristics by swirling impeller abrasive water jet (SAWJ) on granite. International Journal of Rock Mechanics and Mining Sciences. 2022, vol. 159, article 105230. DOI: 10.1016/j.ijrmms.2022.105230.

18. Brenner V. A., Zhabin A. B., Pushkarev A. E., Shchegolevskiy M. M. Gidroabrazivnoe rezanie gornykh porod [Hydroabrasive cutting of rocks], Moscow, Izd-vo MGGU, 2003, 279 p.

19. Baftalovskiy V. E., Ivanushkin I. V., Barabash V. V., Merzlyakov V. G., Shubnyakov A. A. Technology and tools of hydroabrasive cutting of strong rocks. Gornye mashiny i avtomatika. 2003, no. 3, pp. 37—40. [In Russ].

20. Baftalovskiy V. E. Selecting rational parameters for jet-forming elements of hydroabrasive cutting tool. Razrushenie gornykh porod i gornotekhnologicheskoe porodovedenie. Nauchnye soobshcheniya [Rock fracture and rock engineering. Scientific reports], no. 310, Moscow, 1998, pp. 193—202. [In Russ].

21. Merzlyakov V. G., Baftalovskiy V. E., Ivanushkin I. V., etc. Mathematical modeling and technological advancement of hydroabrasive cutting process and tools for solid materials. Trudy 2-y Mezhdunarodnoy konferentsii «Dinamika i prochnost' gornykh mashin» [The 2nd International Conference Proceedings on Strength and Dynamics of Mining Machines], vol. 1. Novosibirsk, 2003, pp. 13—19. [In Russ].

22. Baftalovskiy V. E. Selecting rational parameters for small-size jet-forming tools. Razrushenie ugley i gornykh porod: Nauchnye soobshcheniya [Fracture of coal and rocks. Scientific reports], Moscow, 1989, pp. 55—63.

23. Zhabin A. B., Polyakov A. V., Averin E. A., Shchegolevskiy M. M. Review and refinement of analytical estimation of hydroabrasive erosion in rocks. Mining equipment and electromechanics. 2018, no. 2, pp. 17—25. [In Russ].

24. Zhang J., Li Y. Using a high-pressure water jet-assisted tunnel boring machine to break rock. Advance in Mechanical Engineering. 2020, vol. 12, no. 10. DOI: 10.1177/1687814020 962290.

25. Song D., Wang E., Liu Z., Liu X., Shen R. Numerical simulation of rock-burst relief and prevention by water-jet cutting. International Journal of Rock Mechanics & Mining Sciences. 2014, vol. 70, pp. 318—331. DOI: 10.1016/j.ijrmms.2014.05.015.

26. Baftalovskiy V. E., Ivanushkin I. V. Tests of experimental prototype equipment system MAG in hydroabrasive cutting of solid materials. Problemy razrabotki ugol'nykh mestorozhdeniy: Nauchnye soobshcheniya [Coal Mining: Problems. Scientific reports], no. 320, Moscow, 2001, pp. 124—132. [In Russ].

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