SU1257239A1 - Method of mine abolishment at potassium salt deposits - Google Patents

Description

I

The invention relates to the mining industry and can be used to eliminate mines of polymineral ores.

The purpose of the invention is to reduce the cost of eliminating mines and improving environmental protection by preventing the alkylation of cell pillars.

The method is carried out in the following manner.

On the basis of geological materials, the composition of rocks composing interchamber pillars and walls of mine workings is determined. The base components of the brines are determined to be equilibrium with these rocks. Brines are prepared which should be an equilibrium closed system8 with the main components of the rocks composing interchamber pillars.

On the basis of laboratory and field studies, it was established that brines for flooding the potash mines, represented mainly by sylvite-kainitic rocks, should be extremely saturated with NaC

2f

SO,

2I

And KCf, contain ions and

have the following ratio of components

ents,

i:

S04

since g

Ma

TO

Water

May.%:

2.51-3.25 4.00-4.79 15.72-15.81 4.25-4.36 3.42-3.50 Else

Editor S. Lisin

Compiled by N.Rudenko Tehred I.Popovich

Order 4892/27

Circulation 436 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production. Printing company, .g. Uzhgorod, st. Project, 4

,

12572392

Due to the fact that) 4i, the recovery of brines of such a composition requires a large amount of salts and is difficult under practical conditions,

5, when preparing brines, uterine brines are used; brines of chemical production for the processing of polymineral ores and saturate them in a known manner with the components indicated. For these purposes, solid wastes from those ores are used, the mines after mining which are filled with brine. Cooked brines of this composition are pumped into

5 mine workings through shafts or special wells; s. As a result of filling such voids with such compositions, the mineral components of the inter-chamber pillars and the walls of the mine workings are not leached, the pillars are not destroyed, but instead are strengthened by hydrostatic pressure.

Neutral aggregates, such as solid wastes from chemical production, are used to reduce the required volume of brines and reduce the cost of mine destruction.

30 processing of mineral ores, which are usually placed in tailing ponds.

Solid waste processing of poly-35 mineral ores is moistened with; brines of equilibrium composition and transported to the mine together in the form of pulp ratio T: W 1: 5 - 5.5.

20

25

Proofreader V. But ha

Claims (3)

1. METHOD FOR LIQUIDATION OF MINES IN POTASSIUM DEPOSITS SALTS, represented mainly by sylvinite-kainite rocks, including filling the emptied voids with saturated brines, characterized in that, in order to reduce the cost of liquidating mines and improving the environment by preventing leaching of interchamber pillars, the voids are filled with brines, which are a closed system, equilibrium with the main rock components that make up interchamber pillars, at the next the ratio components, wt.%: 2.51-3.25 SO 4 4.00-4.79 cr 15.72-15.81 to* 3.42-3.50 Na * 4.25-4.36 Water Rest 2. The method of pop. 1, characterized in that when filling in the emptied voids together q with brines serves inert fillers. 3. The method according to claims 1 and 2, characterized in that solid inert chemical wastes are obtained as inert aggregates from the processing of potassium ores from deposits represented mainly by sylvinite-kainite, e £ 1 rocks. SS