Saint-Petersburg Mining University, Saint-Petersburg, Russia:

D. A. Yungmeyster, Professor, Doctor of Engineering Sciences, Yungmeyster_DA@pers.spmi.ru
A. I. Isaev, Associate Professor, Candidate of Engineering Sciences
E. E. Gasymov, Post-Graduate Student

One of the critical process flows in open pit mining is blasthole drilling using self-propelling equipment. Roller-bit drilling rigs enjoy wide application in surface mining. It is of the current concern to increase penetration rate of drilling with such drilling rigs, especially in structurally complex rock mass. The most effective tool to this end is a DTH air drill hammer which allows adjustability of penetration rate, reduction in probability of roller-bit jamming and intensification of removal of chippings. The authors review alternative modifications of roller-bit drilling rigs with intensification of rotary drilling by means of applying impact loads to roller bit. The theoretical research determines the ultimate impact force of a DTH air drill hammer such that the penetration rate of rotary drilling increases at the preserved durability of roller bit. The re-designed air drill hammer with adjustable air damper enables optimized treatment of well bottom by roller bit owing to variation in the compressed air jet intensity and in the tool impact energy. It is expected to manufacture and test a pilot DTH air drill hammer for roller-bit drilling rigs in an open pit mine in the northwest of the country. The experimental research of penetration rate versus impact load proves feasibility of a substantial increase in the penetration rate with the increasing energy of impact generated by DTH air drill hammers. It is required to take into account an essential decrease in the roller bit durability as function of the impact energy in this case. It seems to be important to obtain experimental relationships or families of graphs of roller bit durability and impact energy at different characteristics of rocks and using the three-mass piston–pin–tool system. Wide introduction of drilling rigs SBSH-250 equipped with DTH air drill hammers with adjustable air dampers can essentially increase drilling performance and decrease drilling cost.

1. Kurochkin B. M. Analysis of intensification of well drilling by PDC drill bits in difficultly-drilled rocks using turbo-drill with jet pump. Stroitelstvo neftyanykh i gazovykh skvazhin na sushe i na more. 2011. No. 2. pp. 6–14.
2. Sukhov R. I., Bolkisev V. S., Regotunov A. S. Selection improvement of domestic drilling technique for drilling blast holes. Gornoe oborudovanie i elektromekhanika. 2014. No. 5(102). pp. 46–48.
3. Islamov S. R., Bondarenko A. V., Gabibov A. F., Mardashov D. V. Polymer compositions for well killing operation in fractured reservoirs. Advances in Raw Material Industries for Sustainable Development Goals : The Russian–German Raw Materials Forum. London : Taylor & Francis Group, 2021. pp. 343–351.
4. Khrutskiy A. A., Oshchepkov V. S. Computer modeling of DTH hammer P-110 operation. GIAB. 2018. No. 7. pp. 131–138.
5. Heshamudin N. S., Katende A., Rashid H. A., Ismail I., Sagala F. et al. Experimental investigation of the effect of drill pipe rotation on improving hole cleaning using water-based mud enriched with polypropylene beads in vertical and horizontal wellbores. Journal of Petroleum Science and Engineering. 2019. Vol. 179. pp. 1173–1185.
6. Youhong Sun, Yuanling Shi, Qingyan Wang, Zongwei Yao. Study on speed characteristics of hydraulic top drive under fluctuating load. Journal of Petroleum Science and Engineering. 2018. Vol. 167. pp. 277–286.
7. Yungmeister D. A., Isaev A. I., Korolev R. I. et al. Device f or destruction of rocks by impact pulses. Patent RF, No. 2720041. Applied: 16.04.2019. Published: 23.04.2020. Bulletin No. 12.
8. Vardhan A., Kumar A., Dasgupta K. Effect of various parameters on the performance of the blasthole drilling. Journal of Mines, Metals and Fuels. 2017. Vol. 65, No. 2. pp. 49–54.
9. Zalyaev M. F. The exploration of vibration while drilling wells on thermokarst gas deposit. Nefregazovoe delo. 2015. Vol. 13, No. 4. pp. 36–40.
10. Sudarikov S. M., Yungmeister D. A., Korolev R. I., Petrov V. A. On the possibility of reducing manmade burden on benthic biotic communities when mining solid minerals using technical means of various designs. Journal of Mining Institute. 2022. Vol. 253, No. 1. pp. 82–96. DOI: 10.31897/PMI.2022.14
11. Poderni R. Yu., Khromoy M. R., Sandalov V. F. Basic engineering concepts of a next technical level universal drilling rig. Gornye mashiny i avtomatika. 2001. No. 2. pp. 16–20.
12. Lagunova Yu., Ivanov I., Horoshavin S. Perfection of constructive schemes of drive of running equipment of a career motor transport. International Conference on Modern Trends in Manufacturing Technologies and Equipment. 2018. MATEC Web of Conferences. 2018. Vol. 224. 02031. DOI: 10.1051/matecconf/201822402031
13. Overchenko M. N., Tolstunov S. A., Mozer S. P. Influence of geological conditions and manmade factors on blastholes stability during open mining of apatite-nepheline ores. Journal of Mining Institute. 2018. Vol. 231. pp. 239–244.
14. Dvoynikov M. V. Research on technical and technological parameters of inclined drilling. Journal of Mining Institute. 2017. Vol. 223. pp. 86–92.
15. Bychkov I. V., Dvornikov L. T., Zhukov I. A. Kinematics of Metallurgical Cutters with Parallel Blades. Steel in Translation. 2019. Vol. 49, No. 4. pp. 238–244.
16. Zhukov I. A., Smolyanitsky B. N., Timonin V. V. Improvement of Down-the-Hole Air Hammer Efficiency by Optimizing Shapes of Colliding Parts. Journal of Mining Science. 2018. Vol. 54, Iss. 2. pp. 212–217. DOI: 10.15372/FTPRPI20180205
17. Yungmeister D. A., Korolev R. I., Yacheikin A. I., Isaev A. I. Choice of materials and justification of the parameters for the over-bit hammer. Journal of Physics: Conference Series. 2020. Vol. 1582. 012097. DOI: 10.1088/1742-6596/1582/1/012097
18. Dvoynikov M. V., Nutskova M. V., Blinov P. A. Developments Made in the Field of Drilling Fluids by Saint Petersburg Mining University. International Journal of Engineering, Transactions A: Basics. 2020. Vol. 33, No. 4. pp. 702–711.
19. Shigina A. A., Shigin A. O., Stupina A. A., Kurchin G. S., Kirsanov A. K. Model of Rock Drilling Process in Terms of Roller Cone Bit Remaining Life. International Journal of Applied Engineering Research. 2016. Vol. 11, Iss. 19. pp. 9792–9799.
20. Bolobov V. I., Plaschinskiy V. A. Influence of impact duration on fracture efficiency in rocks and on plastic deformation of metals. GIAB. 2022. No. 3. pp. 78–96.