№79-10

Improvement of technological solutions for reclamation of Morozivskyi lignite open pit mine

O. Shustov¹, A. Adamchuk¹, P. Kravchenko¹,V. Symonenko¹, A. Shustova¹

¹Dnipro University of Technology, Dnipro, Ukraine

Coll.res.pap.nat.min.univ. 2024, 79:121–132

Full text (PDF)

ABSTRACT

Purpose. Substantiation of the parameters of mining reclamation of the sides of the split and howling trenches of the flooded Morozivskyi lignite open pit mine.

Methods. In solving the problems of the study, methods of analytical analysis, graph analytics, engineering calculations, statistical processing, and comparative analysis of data to improve the technological schemes of mining and technical reclamation of the sides of the mine workings of the flooded Morozivskyi lignite open pit mine were used.

Findings. The main stages of land restoration are defined, which are as follows: alignment of slopes of the cut and exit trench at angles ensuring their long-term stability; terracing of aligned slopes; surface layout of dumps; application of fertile soil layer from the warehouse to the surface of terraces and industrial site. For the first time, parameters of mining reclamation were substantiated, namely, the volumes of excavation and filling of workings when straightening the slopes of the sides with bulldozers during top-down work, the width of the transport berm, the angles of the slopes of ledges, which are 18-22 degrees and the distance of movement of rocks with a bulldozer.

The originality. The dependence of the removal volume in the block on the average area of its intersection is established. Based on this dependence, it is concluded that the removal volumes and the intersection areas, in turn, depend on the width of the transport berms, which affects the transportation distance. At the same time, the width of the transport platform during the operation of dump trucks is at least 12 m.

Practical implementation. The technological scheme of mining and technical reclamation has been improved, and the sequence of work on sure sides of the lignite open pit mine, which is at the liquidation stage, has been shown. These technological solutions can be used in implementing projects to eliminate mining enterprises to extract lignite. The recommendations on the reclamation sequence will be useful in the case of the resumption of lignite rock mining with minimal impact on the environment.

Keywords: lignite open pit mine, mining reclamation, flooded mine workings, stripping rock volumes, technological scheme, dump truck, bulldozer.

References

1. Dryzhenko,A.Yu.,Shustov,O.O., & Adamchuk, А.А. (2018) Improving the method of open-pit lignite deposit development in Ukraine.Innovate development of resource-saving technologies for mining. Multi-authored monograph,56–79.

2. Shustov, O. O., Bielov, O. P., Perkova, T. I., & Adamchuk, A. A. (2018). Substantiation of the ways to use lignite concerning the integrated development of lignite deposits of Ukraine. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 3, 5–13. https://doi.org/10.29202/nvngu/2018-3/6

3. Belov, O., Shustov, O., Adamchuk, A., & Hladun, O. (2018). Complex processing of brown coal in Ukraine: history, experience, practice, prospects. Solid State Phenomena, 277, 251–268. https://doi.org/10.4028/www.scientific.net/SSP.277.251

4. Radzyvil, A.Ya., Huridov, S.A., Samarin, M.A., Metalidi, S.V., & Oksenchuk, R.M. (1987). Dniprovskyi burovuhilnyi basein. Naukova dumka.

5. Radchenko, V.V., & Kulish, V.A. (2016). Reabilitatsiia zemel u Dniprovskomu burovuhilnomu baseini. Forum hirnykiv, 2,98–102.

6. Shustov, O., Pavlychenko, A., Bondarenko, A., Bielov, O., Borysovska, O., & Abdiev, A. (2021). Substantiation into parameters of carbon fuel production technology from brown coal. Materials Science Forum, 1045, 90–101. https://doi.org/10.4028/www.scientific.net/msf.1045.90

7. Shustov, O.O., Pavlychenko, A.V, Bielov, O.P., Adamchuk, A.A., & Borysovska, O.O. (2021). Calculation of the overburden ratio by the method of financial and mathematical averaged costs. Naukovyi Visnyk Natsionalnoho Hirnychoho Universytetu, 5, 30–36. https://doi.org/10.33271/nvngu/2021-5/030