Journals →  Gornyi Zhurnal →  2014 →  #12 →  Back

INDUSTRY SAFETY AND LABOUR PROTECTION
ArticleName Ventilation of dead-end headings in coal mines with high gas content
ArticleAuthor Kaledina N. O., Kobylkin S. S.
ArticleAuthorData

Author 1:
Name & Surname: Kaledina N. O.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Professor, Head of department
Scientific Degree: Doctor of Engineering Sciences
Contacts: e-mail: nok52@mail.ru

Author 2:
Name & Surname: Kobylkin S. S.
Company: Mining Institute of National University of Science and Technology MISiS (Moscow, Russia)
Work Position: Assistant Professor
Scientific Degree: Candidate of Engineering Sciences

Abstract

Ventilation of dead-end headings is highly essential for safe and productive mining. Mine ventilation design in Russia is at the moment implemented under oldfashioned guidelines based on empirical relations obtained under entirely different geotechnical parameters of underground mining and air–gas–dust dynamics than those existing in current mines. The prime ventilation mode in dead-end headings in coal mines with high gas content is pressure ventilation. It has a number of shortages. Air flow velocity exceeds critical air flow and creates high dust conditions in face area. High nonuniformity of air flow velocity distribution conditioned by high air consumption in the face area contributes to origination of dead-air spaces near mining and loading machines. Return ventilation air with toxic gas and dust content flows along the entire length of the excavation. Widely spread worldwide, the suction ventilation is not recommended in Russia’s mines with high gas content, while the hybrid ventilation mode is rather complicated, which reduces its serviceability. Efficient application of suction ventilation needs definition of vent modes and ventilation flow chart parameters. To this effect, it is suggested to use the underground mine air–gas dynamic system modeling method developed and tested by the Moscow Mining University. The method allows studies in a wide range of modes of mine ventilation systems with any parameters of underground excavations, in real time and at a scale of 1:1. The use of the offered method requires knowing ratio of the components of gas balance within a work site in a mine. With the available automated control of mine air parameters, statistics on gas emissions in dead-end headings is applicable. According to the analysis of the performance of the considered approaches to mine ventilation, the justification of a mine ventilation method includes the requirement of the efficient gas and dust removal and air turbulization in the face area (to prevent from local methane accumulation). When gas emission is significant and ventilation of a heading needs air flow rate incompatible with the dust extraction capabilities, additional measures of gas emission control are required to be undertaken (degassing, aerodynamic sealing, etc.).
This work was carried out within the State Contract No. 2014/97.

keywords Ventilation method, dead-end heading, coal mine, methane, coal dust, air gas dynamics.
References

1. Available at: http://www.consultant.ru/document/cons_doc_LAW_157929/. (in Russian).
2. Rukovodstvo po proektirovaniyu ventilyatsii ugolnykh shakht (Coal mine ventilation designing guidance). Moscow : Nedra, 1975. 238 p. (in Russian).
3. Nevskiy A. V. Shakhtnye issledovaniya izmeneniya kontsentratsii metana po dline podgotovitelnykh vyrabotok (Mine researches of methane concentration change along development openings' length). Voprosy aerologii ugolnykh shakht: sbornik nauchnykh trudov (Issues of coal mines' atmospheric sounding: collection of scientific proceedings). Skochinsky Institute of Mining, JSC “VostNII”, JSC “Giprouglemash”, JSC “TsNIIpodzemmash”. Moscow, 1981. Iss. 198. pp. 20–23.
4. Voronin V. N. Osnovy rudnichnoy aerogazodinamiki (Basis of mine aerogasdynamics). Moscow : Ugletekhizdat, 1951. 491 p.
5. Skochinskiy A. A., Komarov V. B. Rudnichnaya ventilyatsiya (Mine ventilation). Moscow : Ugletekhizdat, 1959. 632 p.
6. Matrosov A. F. Issledovaniya vsasyvayushchego sposoba provetrivaniya tupikovykh vyrabotok (Researches of exhaust method of blind drift ventilation). Nauchnye raboty institutov okhrany truda Vsesoyuznogo Tsentralnogo Soveta Professionalnykh Soyuzov (Scientific proceedings of labor protection institutes of All-Union Central Council of Trade Unions). Sverdlovsk, 1974. Iss. 92. pp. 3–7.
7. Graumann K., Gastberg I. Provetrivanie prizaboynogo prostranstva pri prokhodke vyrabotok kombaynami izbiratelnogo deystviya (Face space ventilation during opening driving by selective heading machines). Glyukauf = Mining Report Gluckauf. 1984. No. 15. pp. 15–22.
8. Miletich A. F., Yarovoy I. M., Boykov V. N. Rudnichnaya i promyshlennaya aerologiya (Mine and industrial atmospheric sounding). Moscow : Nedra, 1972. 254 p.
9. Myasnikov A. A, Kazakov S. P. Provetrivanie podgotovitelnykh vyrabotok pri prokhodke kombaynami (Ventilation of development openings during the combine driving). Moscow : Nedra, 1981. 269 p.
10. Kaledina N. O., Kobylkin S. S. Sistemnoe proektirovanie ventilyatsii shakht na osnove obemnogo modelirovaniya aerogazodinamicheskikh sistem (System designing of mine ventilation on the basis of solid modeling of aerogasdynamics systems). Gornyy Informatsionno-Analiticheskiy Byulleten = Mining Informational-Analytical Bulletin. 2012. Special issue No. 1 : Proceedings of International Scientific Symposium “Miner's week-2012”. pp. 282–294.
11. Kaledina N. O., Kobylkin S. S. Modelirovanie protsessov ventilyatsii shakht dlya obespecheniya metanobezopasnosti gornykh rabot (Modeling of mine ventilation processes for provision of methane safety of mine operations). Gornyi Zhurnal = Mining Journal. 2011. No. 7. pp. 101–103.

Language of full-text russian
Full content Buy
Back