VENTILATION OF UNDERGROUND EXCAVATIONS IN OPEN PIT/UNDERGROUND COAL MINING

Ventilation of surface and underground mines in hybrid mining obeys common principles and has peculiar features of combination and interaction of open pit and underground mining technologies. Specificity of ventilation of underground excavations in hybrid mining is conditioned by the fact that these excavations are driven from the pit walls and bottom, which are the production areas of open pit mine. Air in such work areas contains much dust and vehicle exhaust gas at concentrations exceeding MAC values. Ventilation induces mixing of air flows and is complicated by the basin-like shape of open pit mine. The function of underground mine ventilation in hybrid mining method reduces to air feed from the windward side of the open pit using booster fans or stationary fan installations and outlet of return air to the mined-out area of open pit where pollution of air with gas is very high. The independent ventilation of underground excavations requires drilling of air holes on the sides or in the center of excavations as air feed pressure and velocity is such air holes are unconstrained under safety regulations. The side air inlet holes need installation of many low-head fans to ensure pre-set air flow rates in development and production headings. Such fans are not produced in lots. Thus, hybrid mining operations require a combination ventilation circuit with air holes equipped with suction pumps to discharge mine air in the atmosphere beyond the limits of open pit mine.

Keywords

Ventilation, underground excavation, hybrid mining, coal deposit, air hole.

Issue number: 5
Year: 2018
ISBN:
UDK: 622.44:622.271.326
DOI: 10.25018/0236-1493-2018-5-0-89-94
Authors: Sencus Val. V., Ermakov N. A., Senkus V. V.

About authors: Sencus Val.V., Candidate of Technical Sciences, Head of Mining Department, LLC «Proektgidrougol-H», Novokuznetsk, Russia, Ermakov N.A., Leading Engineer, Branch of LLC «Sibniiugleobogaschenie», Prokopyevsk, Russia, Sencus V.V., Doctor of Technical Sciences, Professor, Deputy Manager on Research, Branch of LLC «Sibniiugleobogaschenie», Prokopyevsk, Russia.

REFERENCES:

1. Voronin V. N. Osnovy rudnichnoy aerogazodinamiki (The basics of mining aerogasdynamics), Moscow, Ugletekhizdat, 1961, 365 p.

2. Dopolnenie k Rukovodstvu po proektirovaniyu ventilyatsii ugol'nykh shakht (Supplement to the Guidelines for the design of ventilation of coal mines), Moscow, Nedra, 1981, 79 p.

3. Kachurin N. M., Borshchevich A. M., Efimov V. I. Rudnik budushchego. 2010, no 3, pp. 81—88.

4. Kaplunov D. R., Ryl'nikova M. V. Kombinirovannaya razrabotka rudnykh mestorozhdeniy: Uchebnoe posobie (Combined mining of ore deposits: Educational aid), Moscow, izd-vo «Gornaya kniga», 2012, 344 p.

5. Kolmakov V. A., Kolmakov V. V., Mazikin V. P. Ugol'. 2000, no 6, pp. 57—58.

6. Касимов О. И., Капиев Р. Э. Вопросы проветривания шахт Донецкого бассейна: сборник статей), Moscow, 1969, pp. 113—122.

7. Kachurin N. M., Borshchevich A. M., Efimov V. I. Rudnik budushchego. 2010, no 3, pp. 81—88.

8. Los' I. N. Nauchnye osnovy kombinirovannoy razrabotki ugol'nykh mestorozhdeniy Severa (Scientific basis for combined development of coal-based fields in the North), Novosibirsk, Nauka, 1991, 181 p.

9. Rudnichnaya ventilyatsiya: Spravochnik (Mine ventilation: Handbook), Moscow, Nedra, 1988, pp. 15—16.

10. Karacan C. O., Ruiz F. A., Cote M., Phipps S. Coal mine methane: A review of capture and utilization practices with benefits to mining safety and to greenhouse gas reduction. International Journal of Coal Geology. 2011. 86. PP. 121—156.

11. Heather N. Dougherty, C. Ozgen Karacan. A new methane control and prediction software suite for longwall mines. Computers & Geosciences. 2011. 37. Pp. 1490—1500.

12. Özgen C. Karacan. Modeling and prediction of ventilation methane emissions of U.S. Longwall mines using supervised artificial neural networks. International Journal of Coal Geology. 2008. 73. Pp. 371—387.

13. Clarkson C. R. Production data analysis of unconventional gas wells: Review of theory and best practices. International Journal of Coal Geology. 2013. 109—110. Pp. 101—146.

Subscribe for our dispatch