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Title: FORMATION OF AN INTERNAL DUMP DURING EXPLOITATION
FORMATION OF AN INTERNAL DUMP DURING EXPLOITATION

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B. Zarovnyaev; G. Shubin; M. Budikina; M. Sobakina; A. Danilov
10.5593/sgem2021/1.1/s03.050
1314-2704
978-619-7603-62-0
English
21
7.1
• Prof. DSc. Oleksandr Trofymchuk, UKRAINE
• Prof. Dr. hab. oec. Baiba Rivza, LATVIA
Exploration and Mining
Dumping during open-pit mining is one of the important processes on which the area of disturbed lands and the environmental friendliness of the technology as a whole depend. In permafrost conditions, the issue of dumping requires a comprehensive study of the technology, dumping processes and taking into account the strength, thermophysical properties of frozen rocks. In most cases, when developing small coal deposits in the North-East of Russia, favorable mining and geological conditions of bedding are used for internal dumping. This requires the development of a more rational environmentally friendly technology with the subsequent reclamation of the worked-out area.
The paper presents a technology that provides for freezing an ice prism at the base of the dump and strengthening the dump by laying perforated pipes at a distance of at least 2Rprom, where Rprom is the freezing radius around each pipe and filling with a sand-gravel mixture (ASM) in the form of a triangular prism, followed by freezing it to strengthen the base of the dump. After freezing the ice dump of the required height and in order to preserve it in a frozen state, overburden rocks with a thickness greater than the power of seasonal defrost are placed above it.
The developed technology makes it possible to significantly reduce the distance of transportation of overburden to the inner dump, and also ensures the most complete filling of the worked-out space with its subsequent recultivation and increases the stability of the dump on an inclined surface. The triangular frozen prisms make the blade base stable and keep the blade stock on the slope.
Studies of the mining and geological conditions of deposits of small sections showed that the majority of sections have a stripping ratio less than 4, which indicates the need to use the developed technology to supplement the worked-out space with an ice-rock internal dump, taking into account the filling factor (Kzap.). The proposed technological solutions will significantly reduce the area of the disturbed landscape, reduce the cost of reclamation of disturbed lands, and also increase the stability of the dump base on an inclined surface.
conference
https://www.sgem.org/index.php/jresearch-article?citekey=Zarovnyaev20213405412
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21st International Multidisciplinary Scientific GeoConference SGEM 2021
21st International Multidisciplinary Scientific GeoConference SGEM 2021, 16 - 22 August, 2021
Proceedings Paper
STEF92 Technology
SGEM International Multidisciplinary Scientific GeoConference
SWS Scholarly Society; Acad Sci Czech Republ; Latvian Acad Sci; Polish Acad Sci; Serbian Acad Sci & Arts; Natl Acad Sci Ukraine; Natl Acad Sci Armenia; Sci Council Japan; European Acad Sci, Arts & Letters; Acad Fine Arts Zagreb Croatia; Croatian Acad Sci
405-412
16 - 22 August, 2021
website
cdrom
7779
permafrost; open-pit mining; internal dump; ice filling; reclamation of disturbed lands