Perm National Research Polytechnic University, Perm, Russia

D. I. Shishlyannikov, Associate Professor, Doctor of Engineering Sciences
G. D. Trifanov, Head of Department, Professor, Doctor of Engineering Sciences

Saint-Petersburg Mining University, Saint-Petersburg, Russia

Ya. V. Kuskova, Associate Professor, Candidate of Engineering Sciences, yana.kuskova@gmail.com

The article addresses issues connected with mining and processing of potassium ore. Domesticmanufacture heading-and-winning machines Ural equipped with planetary cutter heads produce sickleshaped cuttings, which conditions a high content of non-processible dust particles –0.25 mm in size. Flotation of such ore increases the mass fraction of -0.25 mm size particles by 1 %, which reduces recovery of the useful component from potassium ore by 0.1 % and decreases the annual profit of the mine by hundreds of millions of rubles. It is required to develop engineering solutions aimed to improve quality of particle size distribution in machine mining of potassium ore. The methodology of calculating planetary disc cutter parameters of heading–and-winning machines Ural is described. It is proved that parameters of cuts made planetary discs of the last machine model Ural-20R fall beyond the rational ranges. A planetary cutter head creates a cross-hatch of cuts on the face. In potash mining, the induced micro-cracks and stress localization areas, which are generated in intersection of cuts, can help reduce the amount of dust sizes in potassium ore by 25–30% if series cleavages of stable geometry are created in a cut. This article proposes the design of a planetary cutter head with differently oriented rotation of rotary cutting discs for a heading-and-winning machine to implement a promising cross-hatch fracture mode in potash mining.

1. Qi Geng, Bruland A., Macias F. J. Analysis on the Relationship Between Layout and Consumption of Face Cutters on Hard Rock Tunnel Boring Machines (TBMs). Rock Mechanics and Rock Engineering. 2018. Vol. 51, Iss. 1. pp. 279–297.
2. Koptev V. Yu., Kopteva A. V. Developing an Ecological Passport for an Open-Pit Dump Truck to Reduce Negative Effect on Environment. IOP Conference Series: Earth and Environmental Science. 2017. Vol. 66. 012009. DOI: 10.1088/1755-1315/66/1/012009
3. Koptev V. Yu., Kopteva A. V. Improving Pit Vehicle Ecology Safety. Journal of Physics: Conference Series. 2018. Vol. 1015, Iss. 5. 052014. DOI: 10.1088/1742-6596/1015/5/052014
4. Buevich V. V., Chekmasov N. V., Shishlyannikov D. I., Gabov V. V. Upgrading of effectors of heading-andwinning machines Ural. Gornyi Zhurnal. 2016. No. 4. pp. 52–56. DOI: 10.17580/gzh.2016.04.10
5. Shishlyannikov D. I., Romanov V. A., Zvonarev I. E. Determination of the operating time and residual life of self-propelled mine cars of potassium mines on the basis of integrat ed monitoring data. Journal of Mining Institute. 2019. Vol. 237. pp. 336–343.
6. Maksimov A. B. Justification of parameters for rock cutting tools and loading equipment of headingand-winning machines Ural-20R : Dissertation … of Candidate of Engineering Sciences. Perm, 2019. 182 p.
7. Starkov L. I., Kharlamova N. A. Cross configu ration cutting research. Izvestiya vuzov. Gornyi zhurnal. 1997. No. 7-8. pp. 121–123.
8. Heading-and-winning machines for potassium ore mining. Purpose performance selection and parameter calculation of rock destruction : Industry technique. Leningrad : VNIIG, 1986. 54 p.
9. Vaysberg L. А., I vanov K. S. A universal method of particle shape description, its effect upon sieve classification results. Obogashchenie Rud. 2014. No. 4. pp. 34–37.
10. Yushina T. I., Petrov I. M., Ch erny S. A. On the export of mineral concentrates and the urgency of their advanced processing in Russia. Obogashchenie Rud. 2018. No. 6. pp. 52–57. DOI: 10.17580/or.2018.06.09
11. Rostami J., Soo-Ho Chang. A Closer Look at the Design of Cutterheads for Hard Rock Tunnel-Boring Machines. Engineering. 2017. Vol. 3, Iss. 6. pp. 892–904.
12. Yadong Chen, Tianhua Wei, Tianxing Gong. Research on optimal layout of cutter-head s ystem of rock tunnelboring machine based on Archimedes spiral theory. Advances in Mechanical Engineering. 2018. Vol. 10, Iss. 2. DOI: 10.1177/1687814018759352
13. Maksimov A. B. Enhancement of cutting efficiency in potash mining by heading-and-winning machines with planetary cutter discs. Problemy razrabotki mestorozhdeniy uglevodorodnykh i rudnykh poleznykh iskopaemykh. 2017. No. 1. pp. 378–381.
14. Vaisberg L. А., S afronov А. N. Vibratory disintegration application in processing of different materials. Obogashchenie Rud. 2018. No. 1. pp. 3–11. DOI: 10.17580/or.2018.01.01
15. Beloglazov I. I., Petrov P. A., Gorlenkov D. V. Development of an Algorithm for Control Metallurgical Processes of Fluidized Roasting Using an Adaptive Controller. Journal of Physics: Conference Series. 2018. Vol. 1059. 012015. DOI: 10.1088/1742-6596/1059/1/012015
16. Pashkevich M. A., Alekseenko A. V., Petrova T. A. Application of polymeric materials for abating the environmental impact of mine wastes. Journal of Physics: Conference Series. 2019. Vol. 1384. 012039. DOI: 10.1088/1742-6596/1384/1/012039
17. Gazaleeva G. I., Bulatov K. V., Levchenko E. N. The choosing special methods of disintegration for very complicated rare ore. Proceedings of XXIX International Mineral Processing Congress. Moscow, 2018. pp. 258–268.
18. Starkov L. I., Makarova L. E., Trifanov M. G. et al. Device for cutter attachment on machine actuator. Patent RF, No. 2602435. Applied: 07.10.2015. Published: 20.11.2016. Bulletin No. 32.
19. Ivanova T. S., Malarev V. I., Kopteva A. V., Koptev V. Yu. Development of a power transformer residual life diagnostic system based on fuzzy logic methods. Journal of Physics: Conference Series. 2019. Vol. 1353. 012099. DOI: 10.1088/1742-6596/1353/1/012099
20. Mikhaylov A. V., Rodionov E. A., Zvonarev I. E. Analysis of conditions for vertical cutting of peat. GIAB. 2019. No. 1. pp. 48–54.

21. Vasilyev A. M., Kuskov V. B. Specific features of the concentration process for fine-grained materials in a short-cone hydrocyclone. Obogashchenie Rud. 2018. No. 2. С. 30–34. DOI: 10.17580/or.2018.02.06
22. Chekmasov N. V., Shishlyannikov D. I. Method of rock massif disintegration by rosswise cuts. Patent RF, No. 2522111. Applied: 26.03.2013. Published: 10.07.2014, Bulletin No. 19.
23. Sa vchenkov S. A., Bazhin V. Yu., Vilenskaya A. V. Training of specialists in the field of intellectual property protection and invention at universities for mining engineering. Eurasian Mining. 2018. No. 1. pp. 45–47. DOI: 10.17580/em.2018.01.10
24. Starkov L. I., Shishlyannikov D. I., Maksimov A. B. et al. Self-aligning cutter with fastening device on machine executive body. Patent RF, No. 2672071. Applied: 09.01.2018. Published: 09.11.2018, Bulletin No. 31.
25. Sukhanov A. E., Maksimov A. B. Justification of parameters for loading equipment of heading-andwinning machines Ural-20R. Problemy razrabotki mestorozhdeniy uglevodorodnykh i rudnykh pol eznykh iskopaemykh. 2018. No. 1. pp. 433–436.
26. Han M. D., Cai Z. X., Qu C. Y., Jin L. S. Dynamic numerical simulation of cutterhead loads in TBM tunnelling. Tunnelling and Underground Space Technology. 2017. Vol. 70. pp. 286–298.