SU680357A1 - Method of underground dissolution of salt - Google Patents

Description

(54) METHOD OF UNDERGROUND DISSOLUTION OF SALT

perforation 5 in the interval of mining of salt deposits 1, and production column 6. The main column 4 is cemented in the interval of intersection of wells 2 and 3 with light rocks 7 and in the design interval of the cross section of these wells 2 and 3 with the whole 8. Then erosion and connection of preparatory workings 9 with the formation of a shedding channel 10 by supplying solvent through the production column 6. After the formation of the channel assembly 10 forms, the production column b in well 2 is raised to the calculated height and produced second preparatory development

11 with the stop of the horizontal rear sight 8 between the channel-cover

10 and preparatory generation 11, which provides isolation of preparatory production 11 from the sinking channel 10. When preparative production 11 is formed, solvent is supplied through the production string b of the well 2, and pumping out the resulting brine - along the production string b of the well 3. Non-solvent controlling the formation of the preparation output 11 , served at the same time through the main annulus 4 and operational 6 columns.

After the formation of the preparatory production 11 in the well 2, the formation of a similar preparatory production in the well 3 takes place. The solvent is supplied to the production string 6 of the well 3, and the resulting brine is pumped out using the production string 6 of the well 2.

Then, the development of the main reserves of the salt-laying site 1 by dissolving salt through the system of interacting wells 2 and 3 is started. At the same time, through well 2, the solvent is injected into preparatory production 11 through the production column 11 and the salt is dissolved in steps up; ;:; kBazhiny 2 separate chamber 12. Due to the symmetry of the hydrodynamic flows of the solvent in a separate chamber, its radially symmetric development is ensured. The pumping of the rasyl formed in the chamber 12 leads through the well 3 through the production string b, to which the brine flows from the chamber

12 along the channel 10. The dissolution of salt and the formation of a chamber around another well 3 is carried out by reversing the solvent injection and brine pumping. Between the chambers formed during the salt process, the vertical rear pillar 1 was left

After the chambers reached the design height, they completed the refinement of the operating salt reserves from circuit 14 to design circuit 15, while simultaneously dissolving the vertical pillar 13.

The method of underground salt dissolution can be carried out by connecting two, three, and more wells with intermittent channels to form an appropriate number of separate chambers.

When processing salt deposits, represented by thick layers of salt with proplas-rocks of waste rock, the said interlayers can be used as horizontal pillars between the channels-channels and separate chambers.

 The invention will make it possible to completely extract the mineral within the design contour of the salt deposit mining by underground dissolution, increase the process efficiency, reduce the number of required for

underground salt solution wells.

Claims (1)

1. US patent 3510167, cl.299-4, 1970. Q2. Kalabin A.I. Mining useful HCKonaeNMx underground. leaching M ,, Atomizdat, 1969, p.58-60 (prototype). Yf yf ffffff fr // jf / // / fy // X / //// //////// . - -1W