SU1747682A1 - Method of robbing rib pillars - Google Patents

Abstract

The invention relates to the mining industry. used in the development of ore deposits chamber-and-pillar system. The goal - reducing the complexity of the work. In the rocks of the soil, pads ()) pass through the drift (W). Before laying the intercellular space on the soil around each C, a ditch (K) is formed, and the bottom of each K is connected to the corresponding W, Iv workings located in the roof, leaching solution is supplied, and the productive solution is collected in W. To prevent the solutions from spreading to laying out the space developed on the surface C create an insulating coating. In order to intensify the leaching process from the W axis, C wells are drilled, from which time interval fracturing C is performed. Subsequently, the fracture wells are used to inject C leach solution. 4 hp ff, 2 ill.

Description

The invention relates to the mining industry and can be used in the development of ore reserves in a chamber-and-pillar development system.

There is a method of extraction pillars, including the laying of the space between the pillars and the development of pillars.

The disadvantage of this method is the high complexity and high dilution of the ore mass bookmark.

The closest to the proposed is a method that includes driving drifts in the soil rocks, filled with inter-target space, and working out the rear sight pillar.

The disadvantage of this method is the high laboriousness of the work on the breaking and release of the ore mass. In addition, the method is not guaranteed - 1

The absence of dilution of the ore by the bookmark.

The purpose of the invention is to reduce the complexity of the work.

The goal is achieved by the fact that in the method including drifting drifts in soil rocks, filling the inter-object space with a bookmark, digging pillars and subsequent processing of the ore mass, at R. OCHVS, a receiving groove is formed around each pillar, connecting the bottom of the wells with the drift in the rocks soils, after which a leach solution is injected into the body, and productive solutions are collected in the drift.

In addition, prior to laying the developed space, an insulating coating is created on the surface of the pillar.

cl

WITH

2

About sh go

A full hole is drilled along the rear axle, from which the interval hydraheating of the rear sight is carried out.

The fracture well is used to subsequently inject the leach solution.

Figure 1 shows the developed space, the section; FIG. 2 is a section A — A in FIG. one.

The method is carried out as follows.

In soil 1, excavations 2 under columnar pillars 3 are made. In the developed space, prior to its laying around pillars 3 in soil 1, receiving grooves 4 are performed, for example, by blasting ammunition BB in short undercuts. The grooves 4 are cleaned and can be filled with filter material, such as sand. The depth of the grooves 4 is equal to 0.5 -1m. The bottom of the grooves 4 is connected by wells 5 with workings 2. Then the space developed is filled with a bookmark 6, for example, dry rock. After that, from the production of 2 drill a vertical well 7 along the axis of the rear sight 3.

From well 7, bottom-up interval hydraulic fracturing of the rear sight 3 is carried out by installing and moving packers (not shown). At the same time, cracks are formed along the entire height of the rear sight 3. Then, the well 7 is equipped as a geotechnological one and a leaching solution is injected into it, which seeps through the body of the rear sight 3 and flows along its surface into the receiving grooves 4, of which the productive solution enters the production 2 of the receiving horizon through the wells 5. The loss of the productive solution will be small.

Before laying the developed space, the sight 3 can be covered with an insulating coating 8, for example, polyethylene film webs, which completely excludes leakage of the solution into the bookmark.

After laying, the rear sight 3 can be loosened by explosions, and the solution can be supplied to the rear sight from the workings located in the roof.

Claims (4)

1. A method of working out columnar intercameral pillars, including driving drifts in the soil rocks, filling the interfloor space, laying, dredging pillars and subsequent processing ore mass, characterized in that, in order to reduce the labor intensity of the work, on the soil around each pillar, before laying, a receiving ditch is formed, its bottom is connected with wells with a drift, passed in soil rocks, after which a leaching solution is injected into the pillar body, and productive solutions are collected in the drift. 2. A method according to claim 1, characterized in that an insulating coating is created on the surface of the pillar prior to the laying out of the developed space. 3. A method according to claim 1, characterized in that an axis is drilled along the axis of the pillar, from which the interval fracturing is performed. 4. Method according to claims 1 and 3, characterized in that the fracturing well is used for the subsequent injection of the leach solution. / h A 1