Filling of recovered mining areas using solidifying backfill
Titel:
Filling of recovered mining areas using solidifying backfill
Auteur:
ofranko Marián Zeman Róbert
Verschenen in:
Acta Montanistica Slovaka
Paginering:
Jaargang 6 (2001) nr. 5 pagina's 18-22
Jaar:
2001
Inhoud:
The aim of this article is to explore the possibilities for filling recovered mining areas using solidifying backfill .The article describes the preparation of the backfill (backfill formulation with an eventual application using low quality sands, wastes from treatment plants and ash from power plants etc) now to transport it as well as its application in practice. Advantageous and disadvantageous of this method are also mentioned.Several factors must be taken info consideration during the preparation process of the backfill mixture. Firstly, the quantities of each individual component must be constantly regulated. Secondly, the properties of each component must be respected. In addition, the needs of the pipeline transport system and the specific conditions of the recovered area to be filled must also be considered.Hydraulic transport and pneumo-hydraulic pipeline transport are used for handling the backfill. Pumps for transporting the solidifying backfill have to carry out demanding tasks.Due to the physical-mechanical properties of the backfill, only highly powerful pumps can be considered. Piston type pumps such as Abel Simplex and Duplex pumps with capacities of up to 100 m3.h-1 and operating pressures of up to 16 MPa would be suitable.This method has been applied abroad for different purposes. For example, solid backfill was used in the Hamr mine during exploitation of uranium using the room-and-pillar system mining method.In the OstravaKarvina Coal field, backfill was used in decontamination work, filling areas in a zone of dangerous deformations and for creating a dividing stratum during thick seam mining.Research info the use of solidifying backfill was also done in the Walsum mine in Germany. The aim of this research was:- to investigate the possibilities of filling a collapsing area in a working face using a solidifying mixture of power plant ash and water,- to verify whether towing pipelines proposed by the DMT corporation would be suitable for filling,- to determine whether collapsed rocks would be able to absorb surplus water to prevent it from flowing info the mine.Research has shown that it is necessary to resolve the automatization of the control and management processes of the whole filling process. After the application of high performance computer technology instruments, the filling process will be more effective and of a higher quality.
Uitgever:
Technical University of Kosice, the Faculty of Mining, Ecolo
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