SU1507960A1 - Method of leaching minerals from productive levels - Google Patents

Abstract

The invention relates to the mining industry and can be used in the development of mineral deposits by underground leaching. The goal is to increase the leaching efficiency in the presence of an overlying barren low-permeable layer by increasing the volume of the part of the productive horizon (GH) that is treated with the solution. Open GHG pumping and injection wells (C). They are cased C to the full depth without filter columns. Perforate the columns in the interval PG. The leaching solution is fed into the injection C. The productive solution is pumped out from the exhaust C. The filtration flow is formed. After reducing the concentration of the mineral in the productive solution, re-perforation of the exhaust filter C is performed. The holes that are larger than the original are created in the filter. A hardening solution is injected into the filter zone of the SG and the cavity of the filter. After its hardening, the pumping column C is perforated in the interval of the overlying low-permeable barren layer. Within it are formed extended channels. Simultaneously with an increase in the pressure of the leach solution supply to the injection C, the productive solution is pumped out through the channels of the discharge C. After completion of the leaching, the SGs fill the cavities of the pumping and injection C with hardening material to the roof of the barren layer. 2 hp f-ly, 2 ill.

Description

From to

from 05

1507960

34

This invention relates to a mining injection well.

thinking and can be used under pressure that exceeds

in the development of deposits of useful at the value of working pressure. Vyschelaiskopaemyh underground vyschelachivaniem.chivayuschy solution when moving dostigaTsel invention - the Enhance-effectiveness is impermeable zone 8 and changes the HA ciency leach You are a rule in the presence of seepage into napravshelezhaschego barren slabopronitsaemogolenii perforations vypolslo by increasing the volume GRAIN-nennyh earlier low permeability the part of the productive ore layer 1, which is not loosened by the solutions. 10. To change the initial horizon of the flow direction of the filtration system in FIG. 1 shows a diagram of the flow in the productive formation of the sponi of the method in the production of perforation — an increased pressure of the solution

ny works; in fig. 2 - the scheme of the product, as a result of which

Insulation works in wells. Initially formed elements, after mining of the lower productive go-ny paths of the solution, acquire a rizont. with a new focus. The capture and pumping of the method is carried out as follows: the processing solutions are produced

through the pumping well 4. At the same time

The lower productive horizon 1 of the thickness of the increased pressure of the head is opened 2 with a series of injection 3 and the pumping-alkalizing solution is reduced after

4 technological wells, which began pumping the productive solution, were planted up to the basement 5 of the productive 20 through a low-permeable barren formation of the horizon with blind (without a filter) polyethylene pipes. After completion As the geophysical exploration of the lower production complex of the horizon, it is isolated from the wells, to determine the exact location of another productive burning location of the reservoir, in order to pump

the established interval by way of a hardening solution into the internal porosities of the casing polyethylene pipes of the evacuation and injection wells to

Filters 6 are constructed in injected wells of the roof of the barren layer. Upper

zhinah and 7v pumping wells. productive horizon 11 work

A leach is fed into the injection well, in the order of the same technical solution, which, moving to stations, is the same as the bottom one. the flow of the pumping well, forms the filtration flow of the leaching solution-Formula of the invention. Leaching is useful

fossil. Upon reaching the minimum leaching method

the allowable concentration limit of minerals from productive horizons, fossil in a solution in the range of 35 including opening of a productive out-flow filter of the pumped well, place a perforated pump and injection squapper and re-drill the holes, casing and equipment

pipe with the formation of filters in the filter from "x filters in the interval of productive

Versions with a diameter greater than the diameter, delivery of a leaching filter hole filter during the primary flow to injection wells, pumping out the production. The size of the holes can be a do-tive solution through the pumping wells,

Stick 10–15 mm in diameter so that the change in direction of the filtration method ensures that the fortified has a free passage during the leaching process and the interfering solution into the filtering section of the solution within the pumping well filter. Then, the through-hole part of the pumping well, which distinguishes these holes under pressure, is partly so that, in order to increase the efficiently developed productive plasticity of leaching, in the presence of a hardening solution, forming a bedless, weakly permeable

thereby impermeable to the solution by increasing the volume of the base 8. The hardening solution of the productive part

the internal cavity of the pumping horizon is filled, the wells are equipped with filters of the well, and they are filled with only 50 for the entire thickness of the productive horizon,

punching interval. As a solid-fed leach solution, a borehole can be used in the depositing solution and the solution is pumped out from

van, for example, cement mortar. pumping well to reduce the concentration. After solidification of the solution in the minerals in the productive

the filter part of the pumping well, the solution is below the permissible limit, then in the low-permeable interval without re-perforate the pump’s filter

the ore layer is placed punch and through the well, is injected into the filter part

sweep rocks form in the neyhorizon and the internal cavity of the filter

extended channels 9, then a hardening solution through a pumping well,

and the change in the sampling interval and the direction of the filtration flow is carried out by perforating the column of the pumping well and forming from it long channels in the interval of the overlying non-permeable, low-permeable layer, thus increasing the injection pressure of the solution to the injection wells.

2. The method according to claim 1, wherein

that when re-perforating the filter

 valuable layer

the exhaust well form holes that exceed its original holes 3. The method according to claims. 1 and 2, characterized in that in the presence of several productive horizons, alternating, with weakly permeable interfering layers, rocks, after completion of leaching of the lower productive horizon, hardening solution is injected into the cavity of the inlet and suction wells

.

Claims (4)

Claim 1. A method of leaching minerals from productive horizons, including opening the productive horizon of the pumping and injection wells, casing the wells and equipping them with filters in the interval of the productive horizon, supplying the leaching solution to the injection wells, pumping the productive solution through the pumping wells, changing the direction of the filtration flow in the process leaching and interval selection of the solution within the filter part of the pumping well, characterized in that, in order to increase the efficiency The appearance of leaching in the presence of an overlying barren poorly permeable layer due to an increase in the volume of the productive horizon processed by the solutions, the wells are equipped with filters for the entire thickness of the productive horizon, the leach solution is pumped into the injection well and the solution is pumped out of the pumping well to reduce the concentration of minerals in the productive solution below the permissible limit then re-perforate the filter of the pumping well, pump it into the filter portion of the horizon and the inner The filter cavity of the pumping well hardens the solution, and the change in the interval of the selection of the solution and the direction of the filtration flow is made by perforating the column of the pumping well and forming extended channels from it in the interval of the overlying barren, poor-permeable layer, $ while increasing the pressure of pumping the solution into the injection wells. 2. The method according to π. 1, characterized in that upon repeated perforation of the filter 10 6 pumping holes form holes in excess of its original holes 3. The method according to PP. 1 and 2, characterized in that in the presence of several productive horizons, alternating with poorly permeable layers of the host rocks, after the leaching of the lower productive horizon into the cavity of the injection and pumping wells, a hardening solution is injected to the roof of the poorly permeable layer. FIG. 2 Compiled by M. Podolyako Editor M. Tovtin Order 5464/38 Tehred I. Zeres Corrector I. Muska Circulation 514 Subscription VNIIIPI of the State Committee for Inventions and Discoveries at the USSR State Committee for Science and Technology 113035, Moscow, Zh — 35, Raushskaya nab., D. 4/5 Production and Publishing Plant "Patent", Uzhgorod, st. Gagarina, 101