RU1776800C - Method for plugging-up mine working while erecting antiseepage curtains - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to a hydraulic engineering construction, in particular to a device of anti-filtration curtains. Summary of the invention: a pilot well 1 is drilled and a hydraulic monitor 2 is lowered into it, with which slots are washed out with slots 4. Slots are filled with hardened spray material. When the material of the jet 4 is absorbed by the cavities, the outflow of excess 5 material from the wellhead 1i is stopped. At this moment, the hydraulic monitor 2 is turned off and the plugging mixture is fed into the well in the form of foam and the level of the Jet material 4.6 is lowered. 6 silt. THX

Description

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Phys. 1

The invention relates to hydraulic engineering, in particular to the installation of anti-filtration curtains created by filling the workings with liquid hardening anti-filtration material in soils containing cracks, excavation passages and other underground cavities located along the curtain path.

A known method of plugging workings (wells) by feeding the plugging mixture into the annulus 1.

A disadvantage of the known method is the need to install casing pipes in the well and to reduce the borehole diameter.

The closest is the method of plugging the workings, including filling the workings with liquid hardening material and, after lowering its level to a predetermined level, feeding into the working hole (well) through its mouth with a plugging mixture with desired properties and subsequent drilling of the plugged interval 2.

A disadvantage of this method is the need to drill a plugged interval.

The purpose of the invention is to simplify the method.

In FIG. 1 shows a general process flow diagram for creating a section of an anti-filtration curtain with a jet solution-air double-sided erosion in a well according to a dead end in two stages; in FIG. 2 - fragment of the leakage of the PF material from the development (well) into the underground cavity; in FIG. 3 - the process of pressure supply of the plugging mixture into the development (well) through its mouth; in FIG. 4 - the process of supplying compressed air in the direction opposite to the direction of supply of the plugging mixture; in FIG. 5 - feeding a small portion of the plugging mixture to the surface of the solution of the PF material; in FIG. 6 is a process of lowering the level of a solution of PF material with smearing the plugging mixture along the walls of the well and supplying air in the opposite direction to the plugging mixture.

The method is carried out as follows.

As means of mechanization, well-known complexes of machines and equipment are used (3, 4). The most advanced is the jet technology for the construction of impervious curtains (3).

The curtain is built in sections. For the construction of each section (Fig. 1), a non-self-supporting well 1 is drilled into the tool gates to the depth of the bottom of the suspension, lowered into the Udromonitor 2 well and the two slots 3 (workings) are washed out with solution-air jets 4 while moving the hydromonitor along the axis of the well from the bottom up. The slots are filled with the jet material — for example, a clay-cement mortar with PF — properties which forms a door section to form a curtain section.

A sign of the absorption of the solution by the underground cavities is the cessation of the pouring of its excess 5 w to the wellhead.

5 In this case, the erosion process is stopped, i.e. stop the flow of the solution and air to the hydraulic monitor. Due to leakage, the level of the solution in the well decreases to the position of the mouth of the leak

0 (Fig. 2).

A plug b with oTBepcf is installed at the wellhead, through which a plugging mixture with specified properties is supplied under pressure to the well — increased adhesion to the soil, low specific gravity, quick hardening compared to the properties of PF material (for example, quick-hardening foams - BTP- 1, BTP-2, BTP-3, manufactured using

0 mobile reclamation foamer PMP-2 (2).

A foam plug is filled in the wellbore above the level of the solution. It flows into leak channel 7 and

5 clogs it (Fig. 3).

Then the plug is removed and compressed air is fed through the hydraulic monitor into the well. Air bubbles, rising from below the level of the solution, form an air flow in the wellbore opposite to the direction of supply of the plugging mixture, which prevents the formation of a cement plug from the hardened foam (Fig. 4).

5 In order to save grouting mixture (in particular foam), the latter can be fed into the well in a small portion in a pressureless mode. A portion of the foam is served on the surface of the solution (Fig. 5). The solution is then lowered, for example by suctioning it to the surface through a hydraulic monitor. Lowering the level of the solution is accompanied by smearing of foam along the walls of the well (Fig. B) due to adhesion with

5 soil and the formation on the walls of the well of a foam crust. Air supply prevents the formation of cement plugs on the surface of the mortar. The hardened foam pieces are removed from the well by an air stream or a solution stream.

after resuming the jet wash process.

Claims (1)

SUMMARY OF THE INVENTION A method of plugging production with a device of anti-filtration curtains, comprising partially filling the production with anti-filtration material //////// t / scrap and feeding the plugging mixture into the production, characterized in that, in order to simplify the plugging process, after the supply of the plugging mixture to the generation is completed, air is additionally supplied in the direction opposite to the supply direction of the plugging mixture before it hardens. FIG. J . ///// 77 / $ 5 Figl 77/7 ////// 3L / g ig At v FIG. 5 FIG. 6