MINING OF THIN AND EXTRA THIN SEAMS WITH WASTE ROCKS LEFT IN THE MINE

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Parent Category: Geo-Technical Mechanics, 2013

Category: Geo-Technical Mechanics, 2013, Issue 110

UDC 622.273.21

Koshka A.G., Ph.D. (Tech.) (SHEI «NMU»)

Yavors’kyy A.V., Ph.D. (Tech.) (SHEI «NMU»)

Malashkevych D.S. (SHEI «NMU»)

Yavors’kaya E.A., Ph.D. (Tech.) (SHEI «NMU»)

Abstract. The article describes status and pressing challenge of a problem concerning leaving of waste rocks after coal-cutting in the mined-out space of the stopes and development headings in the faces, and presents the most rational way of solving this live problem. In order to estimate rate of subsidence and to construct troughs of surface replacement at various types of backfilling of the mined-out space with the stowing materials a mathematical apparatus is used which was designed by the Dnipropetrovs’k National Mining University. The design model includes a layer of sediment, carbon, coal seam, stope and mined-out space filled with a stowing material and caved rocks. Results of calculation of surface subsidence are shown depending on the completeness of the stowing and full roof subsidence in the stope. Findings presented in this paper make the gravity-fed stowing efficient and cost-justifying way to leave the rocks in the mine.

Keywords: selective mining, leaving rocks, lowering of the surface.

References:

1. Buzilo, V.I.,  Коshka, A.G., Serduk, V.P. and etc. (2012), Technologiya selektivnoy otrabotki tonkikh ugolnykh plastov [The technology of selective mining of thin coal seams],  National Mining University,  Dnepropetrovsk, Ukraine.

2. Buzilo, V.I., Sulaev, V.I, Koshka, A.G. and etc (2013), Technologiya otrabotki tonkikh plastov s zakladkoy vyrabotannogo prostranstva [Technology mining thin seams with stowing goaf], National Mining University, Dnepropetrovsk, Ukraine.

3. Dzhvarsheishvili, A.G., Silagadze, V.A., Inashvili, A.K. and Shavgulidze, Sh.V. (1978), Zakladochnoe khozyaystvo shakht i rudnilov [Waste stowing mines], Nedra, Moscow, USSR.

4. Yavors`kyy, A. V., Koshka, O.G., Serduk, V.P. and Yavors`ka O.O. (2010), Napryazhenno-deformirovannoe sostoyanie porodnogo massiva pri otrabotke pologogo ugolnjgj plasta pod okhrannymi obektami [Stress-strain state of rock massif during mining flat coal seam under the protected objects], National Mining University, Dnepropetrovsk, Ukraine.

About the authors:

Koshka Aleksandr Grygorevyh, Candidate of Technical Sciences (Ph.D), Associate Professor of the Underground mining department, State Higher Educational Institution «National Mining University» (SHEI «NMU»), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Yavors’kyy Andrey Vasylevych, Candidate of Technical Sciences (Ph.D), Associate Professor of the Underground mining department, State Higher Educational Institution «National Mining University» (SHEI «NMU»), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Malashkevych Dmytriy Sergeevych, Post-graduate Student of the Underground mining department, State Higher Educational Institution «National Mining University» (SHEE “NMU”), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

Yavors’kaya Elena Aleksandrovna, Candidate of Technical Sciences (Ph.D), Associate Professor of the Aerology and labor protection department, State Higher Educational Institution «National Mining University» (SHEI «NMU»), Dnepropetrovsk, Ukraine, This email address is being protected from spambots. You need JavaScript enabled to view it. .

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