Introduction. The article deals with the research of parameters and characteristics of mine drainage elements for conveying unlit mine water, evaluation of efficiency and rationality of using such transport complexes as loading-delivery machines, scraper winches, wagons for mechanized cleaning of drain sumps from settling and accumulating mine sludge. At present, the solution of this issue is a widespread task for operating services of mining enterprises. At the same time, it is a promising direction for scientific research.
Methods of research. The scientific and practical experience in the field of mining drainage was analyzed and generalized. Mine drain sumps and their principles operation were described. Drain sumps operation working cycle was calculated and described. Operational parameters for a mechanized method of cleaning with transport complexes were calculated. The effectiveness of the measures for cleaning drain sumps using the means of a mechanized complex were calculated and assessed by determining quantitative efficiency indicators in the form of time spent by load-haul machines and transport complexes for cleaning.
Results and analysis. The efficiency of transport complexes was evaluated by calculating the time of their use for non-productive work. The structural scheme of sequential operation of water collectors and the process of their treatment during the calendar time is developed. It is determined that the existing drain sumps currently perform the function of mine water clarification ineffectively. The interrelation of decreasing of operating time of elements of centrifugal drainage pumps and composition of pumped liquid has been established.
Scope of results. The results of the research are recommended for implementation for all enterprises conducting underground mining works with the use of mine drainage, as well as for design institutes designing mine workings.

Keywords: drain sump; transport complex; productive time.

REFERENCES

1. Dolganov A. V. Improving the efficiency of water drainage operation at copper-sulphide mines:
PhD in Engineering abstract of diss. Ekaterinburg: UrSMU Publishing; 2012. (In Russ.)
2. Olizarenko V. V., Mingazhev M. M. Main drainage in copper-sulphide deposits development in the
Southern Urals: monograph. Magnitogorsk: MSTU Publishing; 2010. (In Russ.)
3. Melnikov T. I. Analyzing the existing formulae for the determination of critical speed and hydraulic
slope in dredge piping. Trudy Magnitogorskogo gornometallurgicheskogo instituta = Proceedings of
Magnitogorsk Mining Metallurgical Institute. 1958; 15: 69–109. (In Russ.)
4. Rybakov A. N., Gabbasov B. M. Improving the efficiency of piston pumps when pumping off
the sludge. In: Kolokoltsev V. M. (ed.) Burning Issues of Modern Science, Technology, and Education:
Proceedings of the 72nd Interregional Scientific and Technical Conference. Magnitogorsk: 2014. Vol. 1.
p. 36–39. (In Russ.)
5. Mazhitov A. M., Kutlubaev I. M., Polovnev V. V., Prostikhin I. V. Developing the model of a
mining system for a complex deposit development. In: The Latest Achievements of Academic Scientific
Schools: Proceedings of the National Scientific Conference. Magnitogorsk; 2020. p. 169–171. (In Russ.)
6. Timukhin S. A., Ugol'nikov A. V., Petrovykh L. V., Stozhkov D. S., Lubinskii A. Iu. Mine drainage.
Patent RF no. 2472971; 2013. 4 p.
7. Spivakovskii A. O., Diachkov V. K. Transporting machines. Moscow: Mashinostroenie Publishing;
1983. (In Russ.)
8. Knoroz V. S. Hydraulic fluid motion in pressure lines and their analysis method. Izvestiia VNIIG =
Proceedings of VNIIG. 1941; 30: 256. (In Russ.)
9. Reference guide on hydraulic transport design. Promtransniiproekt. Moscow: Stroiizdat
Publishing; 1988. (In Russ.)
10. Zhang N., Gao B., Ni D., Liu X. Coherence analysis to detect unsteady rotating stall phenomenon
based on pressure pulsation signals of a centrifugal pump. Mechanical Systems and Signal Processing.
2021; 148. Available from: doi: 10.1016/j.ymssp.2020.107161
11. Cao P., Zhu R., Yin G. Spike-type disturbances due to inlet distortion in a centrifugal pump.
Renewable Energy. 2021; 165: 288–300. Available from: doi: 10.1016/j.renene.2020.11.060
12. Li Q., Li S., Wu P., Huang B., Wu D. Investigation on reduction of pressure fluctuation for a
double-suction centrifugal pump. Chinese Journal of Mechanical Engineering (English edition). 2021;
34(1). Available from: doi: 10.1186/s10033-020-00505-8
13. Pacello J., Pacello J. L. Solving the problems of pumping medium-to-high density paper stock.
World Pumps. 1997; 368: 68–71.
14. Mazhitov A. M. Assessment of the extent of man-induced transformation of a subsoil block in
upward mining using ore and host rock caving. Gornaia promyshlennost = Mining Industry. 2021; 4:
113–118. (In Russ.)
15. Mazhitov A. M., Volkov P. V., Krasavin A. V., Allaberdin A. B. Developing the technology for the
formation of an artificial array with specified geotechnical characteristics. Izvestiya vysshikh uchebnykh
zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 2: 51–58. (In Russ.)

Introduction. The paper studies of the activities of Uralian ore sleuths from the 17th to 18th century. Ore prospecting in the region at this time developed independently and at the same time as geology and other mining sciences. The phenomenon of ore sleuths is therefore a fundamental premise for understanding the peculiarities of Ural mining culture development.
Research objective is to consider the emergence of the category of entrepreneurs-ore sleuths and ore producers from the peasantry, their legal status development, relations with the state-owned industry and the mining administration.
Methods of research include the concept of diffusionism, one of the components of which is the dissemination and adaptation of basic industrial technologies and, as a consequence, the development of new industrial sectors and socio-economic relations in the agrarian region.
Results. Ore sleuths, as an understudied aspect of the region’s industrial development, have been investigated. They were the first to locate ores and minerals, to discover the most famous deposits. From the second half of the 18th century they focused on the quest for gold. It has been established that since the 1730s some miners became a special legal category of persons who conducted the affairs based on a decree of a central or regional authority. “Honorary” decree on exemption from factory work, communal duties, and military service, giving a freedom of movement was the purpose of ore sleuth status acquisition and a prerequisite for keeping it. The ore sleuth status was not always used for its intended purpose. Ore sleuths often traveled to fairs and handled a business. Edicts and decrees appointing the ore sleuth’s status have been identified. It is shown that ore prospecting in the 17–18th centuries developed independently and at the same time as mining sciences.

Keywords: ore sleuths; the Babins; mining culture; mining; the Urals; 17th century; 18th century.

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Introduction. The article deals with the research of parameters and characteristics of mine drainage elements for conveying unlit mine water, evaluation of efficiency and rationality of using such transport complexes as loading-delivery machines, scraper winches, wagons for mechanized cleaning of drain sumps from settling and accumulating mine sludge. At present, the solution of this issue is a widespread task for operating services of mining enterprises. At the same time, it is a promising direction for scientific research.
Methods of research. The scientific and practical experience in the field of mining drainage was analyzed and generalized. Mine drain sumps and their principles operation were described. Drain sumps operation working cycle was calculated and described. Operational parameters for a mechanized method of cleaning with transport complexes were calculated. The effectiveness of the measures for cleaning drain sumps using the means of a mechanized complex were calculated and assessed by determining quantitative efficiency indicators in the form of time spent by load-haul machines and transport complexes for cleaning.
Results and analysis. The efficiency of transport complexes was evaluated by calculating the time of their use for non-productive work. The structural scheme of sequential operation of water collectors and the process of their treatment during the calendar time is developed. It is determined that the existing drain sumps currently perform the function of mine water clarification ineffectively. The interrelation of decreasing of operating time of elements of centrifugal drainage pumps and composition of pumped liquid has been established.
Scope of results. The results of the research are recommended for implementation for all enterprises conducting underground mining works with the use of mine drainage, as well as for design institutes designing mine workings.

Keywords: drain sump; transport complex; productive time.

REFERENCES

1. Dolganov A. V. Improving the efficiency of water drainage operation at copper-sulphide mines:
PhD in Engineering abstract of diss. Ekaterinburg: UrSMU Publishing; 2012. (In Russ.)
2. Olizarenko V. V., Mingazhev M. M. Main drainage in copper-sulphide deposits development in the
Southern Urals: monograph. Magnitogorsk: MSTU Publishing; 2010. (In Russ.)
3. Melnikov T. I. Analyzing the existing formulae for the determination of critical speed and hydraulic
slope in dredge piping. Trudy Magnitogorskogo gornometallurgicheskogo instituta = Proceedings of
Magnitogorsk Mining Metallurgical Institute. 1958; 15: 69–109. (In Russ.)
4. Rybakov A. N., Gabbasov B. M. Improving the efficiency of piston pumps when pumping off
the sludge. In: Kolokoltsev V. M. (ed.) Burning Issues of Modern Science, Technology, and Education:
Proceedings of the 72nd Interregional Scientific and Technical Conference. Magnitogorsk: 2014. Vol. 1.
p. 36–39. (In Russ.)
5. Mazhitov A. M., Kutlubaev I. M., Polovnev V. V., Prostikhin I. V. Developing the model of a
mining system for a complex deposit development. In: The Latest Achievements of Academic Scientific
Schools: Proceedings of the National Scientific Conference. Magnitogorsk; 2020. p. 169–171. (In Russ.)
6. Timukhin S. A., Ugol'nikov A. V., Petrovykh L. V., Stozhkov D. S., Lubinskii A. Iu. Mine drainage.
Patent RF no. 2472971; 2013. 4 p.
7. Spivakovskii A. O., Diachkov V. K. Transporting machines. Moscow: Mashinostroenie Publishing;
1983. (In Russ.)
8. Knoroz V. S. Hydraulic fluid motion in pressure lines and their analysis method. Izvestiia VNIIG =
Proceedings of VNIIG. 1941; 30: 256. (In Russ.)
9. Reference guide on hydraulic transport design. Promtransniiproekt. Moscow: Stroiizdat
Publishing; 1988. (In Russ.)
10. Zhang N., Gao B., Ni D., Liu X. Coherence analysis to detect unsteady rotating stall phenomenon
based on pressure pulsation signals of a centrifugal pump. Mechanical Systems and Signal Processing.
2021; 148. Available from: doi: 10.1016/j.ymssp.2020.107161
11. Cao P., Zhu R., Yin G. Spike-type disturbances due to inlet distortion in a centrifugal pump.
Renewable Energy. 2021; 165: 288–300. Available from: doi: 10.1016/j.renene.2020.11.060
12. Li Q., Li S., Wu P., Huang B., Wu D. Investigation on reduction of pressure fluctuation for a
double-suction centrifugal pump. Chinese Journal of Mechanical Engineering (English edition). 2021;
34(1). Available from: doi: 10.1186/s10033-020-00505-8
13. Pacello J., Pacello J. L. Solving the problems of pumping medium-to-high density paper stock.
World Pumps. 1997; 368: 68–71.
14. Mazhitov A. M. Assessment of the extent of man-induced transformation of a subsoil block in
upward mining using ore and host rock caving. Gornaia promyshlennost = Mining Industry. 2021; 4:
113–118. (In Russ.)
15. Mazhitov A. M., Volkov P. V., Krasavin A. V., Allaberdin A. B. Developing the technology for the
formation of an artificial array with specified geotechnical characteristics. Izvestiya vysshikh uchebnykh
zavedenii. Gornyi zhurnal = News of the Higher Institutions. Mining Journal. 2019; 2: 51–58. (In Russ.)

The article contains information on the outcome of the 8th scientific and practical conference with international participation, Drilling and Blasting Technology and Safety in Opencasts and Underground Mines of the Urals. The conference was held within the framework of the 9th Ural Mining Forum and URAL MINING’21 Exhibition on the occasion of the Year of Science and Technology in the Russian Federation and the 30th anniversary of the Mining Association of the Ural region at the venues of IEC Ekaterinburg-EXPO and PJSC Uralasbest. The article also recounts the Ural Mining Prize’21 winners heard at the conference of scientific-technical reports and reports on blasting. The seminar at PJSC Uralasbest was summarized. At the seminar, under the guidance of N. A. Chistiakov, the engineer in-chief of Promtekhvzryv, and G. P. Bersenev, CEO of the Ural Blasters Association, tours to the quarry were given, as well as to Poremit which is the first Ural industrial emulsion explosives plant, explosive bulk storage, museum, and training center of the Ural Asbestos Mining and Processing Plant. After the tours, the second part of the conference was actually held at the venue of the plant’s training center. A number of reports were heard at the conference. At the end of the travel seminar, the Ural Blasters Association awarded Promtekhvzryv specialists with certificates of honor and valuable gifts for their service in production activities for improving the drilling and blasting technologies at the enterprise and workplace management at projects related to blasting. In conclusion, the article indicates the decisions adopted at the conference.

Keywords: scientific and practical conference; international participation; Drilling and Blasting Technology and Safety in Opencasts and Underground Mines of the Urals; Ural Mining Forum; Institute of Mining UB RAS; Ural Blasters Association; PJSC Uralasbest; Promtekhvzryv.

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