Influence of the explosion of a borehole charge with a radial gap on the quality of destruction of diamond-bearing ore

The modern approach to the production efficiency of diamond mining enterprises is increasingly focused on the quality of the produced marketable products due to the high cost of crystals and the irreversibility of their damage. At the same time, the technogenic damage of diamond products depends on many factors of production. Given the high dynamics of the explosion process, on the one hand, and the increased fragility of diamond crystals, on the other hand, it is quite appropriate to assume that diamond crystals can be damaged when they enter a certain area of explosive destruction in a rock mass. It is possible to increase the safety of mined diamonds through the use of core explosive charges with a radial gap, the use of which will allow controlling the stressed state of the massif, reducing the size of zones with an increased risk of crystal damage while maintaining the total volume of destruction of the host rock. Purpose of the study, was the development of crystal-saving technology using borehole charges with a radial gap. The article discusses the impact of borehole charge explosions on the quality of the destruction of a rock mass and the safety of the crystals contained in it, considers the existing methods for the preservation of rough diamonds, proposes a crystalsaving technology for drilling and blasting, and also presents the results of industrial testing of the proposed technology, using the developed special device for formation of a charge with a radial gap.

Ziryanov I. V., Bondarenko I. F., Kovalevich S. V., Kim S. I. Influence of the explosion of a borehole charge with a radial gap on the quality of destruction of diamond-bearing ore. MIAB. Mining Inf. Anal. Bull. 2022;(5—2):58—71. [In Russ]. DOI: 10.25018/0236_1493_2022_52_0_58.

Ziryanov I. V., Dr. Sci. (Eng.), Deputy Director for scientific work of the «Yakutniproalmaz» Institute of ALROSA PJSC, e-mail: ZyrianovIV@alrosa.ru, Head of the Department of Mining and Oil & Gas at Mirny Polytechnic Institute (Branch) of M. K. Ammosov NorthEastern Federal University, ORCID 0000-0003-4346-6671;
Bondarenko I. F., Cand. Sci. (Eng.), Scientific Secretary of «Yakutniproalmaz» Institute of ALROSA PJSC, 39 Lenina St., Mirny, Republic of Sakha (Yakutia), 678175, e-mail: BondarenkoIF@alrosa.ru, ORCID 0000-0002-9414-2661;
Kovalevich S. V., Cand. Sci. (Eng.), Head of the Rock Destruction Sector of the «Yakutniproalmaz» Institute of ALROSA PJSC, 39 Lenina St., Mirny, Republic of Sakha (Yakutia), 678175, e-mail: KovalevichSV@alrosa.ru, ORCID 0000-0003-1087-0395;
Kim S. I., research associate, e-mail: KimSI@alrosa.ru, ORCID 0000-0003-3849-0298, «Yakutniproalmaz» Institute of ALROSA, 39 Lenina St., Mirny, Republic of Sakha (Yakutia), 678175.

Kim S. I., e-mail: KimSI@alrosa.ru.

1. Sekisov А. G., Cheban А. Yu. Crystal-saving technology of opencast mining of complex-structured kimberlite deposits. Bulletin of the Magnitogorsk State Technical University. G. I. Nosova, 2021. Vol. 19. nо. 2. pp. 5—13. https://doi.org/10.18503/1995— 2732—2021—19—2—5—13 [In Russ.]

2. Chaadaev А. S., Ziryanov I. V., Bondarenko I. F. State and prospects for the development of mining and processing technologies at diamond mining enterprises ALROSA. Mining. 2017. nо. 2. pp. 6—13. [In Russ.]

3. Kozeev A. A, Vedin A. T. Theoretical and practical prerequisites for the creation of a crystal-saving diamond mining technology. Resource-saving technologies for open-pit mining of minerals in the NorthYakutsk. Yakutskiy nauchnyy tsentr SO AN USSR. 1990. P. 8—10. [In Russ.]

4. Li-Yun Yang, Chen-Xi Ding. Fracture mechanism due to blast-imposed loading under high static stress conditions. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 107.pp. 150—158. DOI:10.1016/j.ijrmms.2018.04.039

5. Ping Zhang, Ering Nordlund, Graham Swan, Changping Yi. Velocity Amplification of Seismic Waves Through Parallel Fractures Near a Free Surface in Fractured Rock: A Theoretical Study. Rock Mechanics and Rock Engineering. 2019. Vol. 52. Iss. 1. P. 199— 213. DOI:10.1007/s00603—018—1589—8

6. Leksovsky A. M., Krivosheev S. I., Borovikov V. А. Revealing “Post factum” of the development of the front of damage during spall destruction of granite. col. «XIV Petersburg readings on the problems of strength», 2003. [In Russ.]

7. Borovikov V. А., Leksovsky A. M., Kalitin V. T. New aspects of improving the safety of diamonds in kimberlite mining. Mining, 2006. nо. 6. pp. 77—81. [In Russ.]

8. Borovikov V. А., Leksovsky A. M. Features of the amplitude-time characteristics of the wave during the explosion of low-density granulite. В сб.: Physical problems of rock destruction. Мoscow, IPKON RAN, 2005. [In Russ.]

9. Borovikov V. А., Riskunov А. А., Slastenko V. S., Parameters of the stress wave during the explosion of low-density explosives. Explosives. 1999. nо. 92/94. pp. 42—46. [In Russ.]

10. Bondarenko I. F., Zharikov S. N., Zyryanov I. V., Shemenev V. G. Drilling and blasting in kimberlite quarries of Yakutia. Ekaterinburg: IGD Ural Branch of the Russian Academy of Sciences, 2017. рр. 122—128, [In Russ.]

11. Bondarenko I. F., Nikitin R. Ya., Khon V. I., Kovalevich S. V. On the issue of explosion energy management. Subsoil use XXI century. 2018. no. 2 (71). pp. 62—69. (In Russ)

12. Vorobieva L. D, Procenko V. Е. Influence of the size of the radial clearance and filler material on the dynamic loading of the medium during explosion. Bulletin of the KDPU named after Mikhail Ostrogradsky. release 6/2008 (53). Part P. 111—113. [In Russ.]

13. Eremenko G. I, Martinyuk М. V. Development and application of designs of borehole explosive charges with a radial clearance in the destruction of rocks in an open pit, 2012 (http://webcache.googleusercontent.com/search?q=cache:bIeQ_0IespcJ:www.irbisnbuv.gov. ua/cgibin/irbis_nbuv/cgiirbis_64.exe%3FC21COM%3D2%26I21DBN%3DUJRN%26P21 DBN%3DUJRN%26IMAGE_FILE_DOWNLOAD%3D1%26Image_file_name%3DPDF/ girvi_2012_95_59.pdf+&cd=1&hl=ru&ct=clnk&gl=ru). [In Russ.]

14. Nikitin R. Ya. Evaluation of the results of massive explosions in the zoning of a quarry field by explosiveness. Problems and Prospects of Integrated Development of Permafrost Mineral Deposits. Yakutsk. Institut merzlotovedeniya im. P. I. Mel’nikova SO RAN, 2005. P. 142—148. [In Russ.]

15. Makarsky I. V., Tarasova L. G., Nikitin D. N. Instrumental method for monitoring the safety of diamond products. Problems and prospects for efficient processing of mineral raw materials in the 21st century (Plaksin Readings 2019): Proceedings of the International Meeting. Irkutsk, September 9—14, 2019. Irkutsk, Reprocenter A1, 2019. рр. 69—72. [In Russ.]

16. Bondarenko I. F., Krutsky А. А. Influence of the type of explosive on the damageability of crystal raw materials.,. Theory and practice of improving blasting technology: Kiev, 1990. pp. 115—118. [In Russ.]

17. Comparative assessment of methods of destruction of diamond-bearing kimbirlites / Bondarenko I. F.. Mining magazine. 1995. no. 6. pp. 25—27. [In Russ.]

18. Blair D. P. Dynamic response of mine pit walls. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 106. P. 14—19. DOI:10.1016/j.ijrmms.2018.04.002

19. Bozorgzadeh N., Escobar M. D., Harrison J. P. Comprehensive statistical analysis of intact rock strength for reliability-based design. International Journal of Rock Mechanics and Mining Sciences. 2018. Vol. 106. P. 374—387. DOI:10.1016/j.ijrmms.2018.03.005