Module (mobile) backfilling complex schemes are known for iron ore industry companies. Their operating principles are simple, they are highly productive, they allow to place standardized equip-ment in constraint environment of mines and carry-out pulp preparation directly in the backfill operations area, herewith there are no expenses for transportation of viscous and closed mixtures in long distances, but there are expenses for delivery of mixture components.

Operation of mobile backfilling units in the potash mine is possible using flow sheets of backfilling material supply by mechanical or hydraulic method. Backfilling of salt from development workings driving is applied everywhere in all mines and performed by mechanical method. Hydraulic method of pulp preparation in underground conditions has been tested first in SKRU-1 of «Uralkali» PJSC by carnallite backfilling shift from mechanical method to hydraulic one, then by experimental and production works in BKPRU-4 of «Uralkali» PJSC.

The test results are positive. By choosing a pulp preparation site for mobile backfilling it is necessary to consider availability of the brine pipe or the brine capacity for permanent brine supply, dimensions of the working and a distance to mined-out backfilling rooms. In mobile backfilling complex for pulp supply it is recommended to use a piston pump which enables to transport high-concentrated pulp. Concrete pumps application allows not to install a crusher, required by using soil pumps for pulp supply, before a mixer. Besides, piston concrete pumps develop a head sufficient for pulp transportation in long distances.

The performed tests of «Putzmeister» BSA 1409 concrete pump in the salt tailings pile of BKPRU-2 of «Uralkali» PJSC have shown that it can transport high-concentrated pulp of salt waste. According to the preliminary data a working range of the piston pump can account for up to 1.5 km in potash mine conditions.

Issue number: 9
Year: 2017
ISBN:
UDK: 622.273.2
DOI: 10.25018/0236-1493-2017-9-0-144-150
Authors: Rusakov M. I., Shilov A. V.

About authors: Rusakov M.I., Head of Laboratory, e-mail: Mihail.Rusakov@uralkali.com, Shilov A.V., Leading Engineer, e-mail: Aleksandr.Shilov@uralkali.com, Joint stock company «VNII Galurgii», 614002, Perm, Russia.

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