The electrode-injector for electrochemical bridging rocks

 

(57) Abstract:

The invention relates to mining, particularly coal mine construction. The purpose of the invention is the expansion of the scope of the injector, improving the quality and safety of grouting works in a hazardous environment. The electrode-injector (EI) includes a housing in the form of a tubular rod (TC) with a perforated bottom. TC is made integral with its lower part made of conductive material. The upper part of the vehicle consists of segments of tubular rods, covered with an insulator, and is supplied with a check valve. EI provided with a bunching device and explosion-proof junction box. 2 Il.

The invention relates to mining, particularly coal mine construction, and is intended for water shutoff and strengthening of unstable rocks in an explosive environment by way of electrochemical backfill in the mine construction, and can also be used in the construction of residential, industrial and hydraulic purposes.

Known injector for electrochemical soil stabilization [1] consisting of a body in the form of a pipe with a perforated bottom and hose sacroplasty rod.

The disadvantage of this injector is that it is designed for electrochemical processing of the array, uniform in composition and properties, at a shallow depth, it is completely inapplicable in explosive atmospheres, such as in mines, hazardous gas; not solved the problem of sealing the mouth of the well, resulting in the potential output of the electrolyte in the annular space; this injector does not apply in aquifers with high formation pressure: possible exit of water through the injector.

The aim of the invention is to expand the scope, quality improvement strengthening of rocks and security perform work in a hazardous environment.

The aim is achieved in that the electrode-injector made of a number of structural elements and contains pokerwise device, explosion-proof junction box and the check valve, and the rod electrode is also made integral with the lower perforated part is working and is made of conductive material, and the upper part consists of typesetting sections, covered with a dielectric.

In Fig.1 shows the schematic design of the electrode-injector of Fig.2 explosion-proof raspredeleniya part with a dielectric coating; 3 pokerwise device; 4 explosion-proof junction box; 5-return valve; 6 rod; 7 case hazardous junction boxes; 8 cover explosion-proof boxes; 9 neck; 10 stud.

The electrode-injector for electrochemical backfill consists of the working part 1, representing a perforated pipe made of conductive material, on which are screwed the partition off part 2.

Outside of part 2 is also a pipe, but without perforation and covered with a dielectric. Outside part can consist of a number of sections connected to each other by means of threads. Its length depends on the structure and lithological composition of rocks. The reason is that it is not always necessary to subject the electrochemical processing the entire array simultaneously with the same electrical parameters (for different lithological composition of rocks require different current density).

To the outside part 2 attached pokerwise device 3 designed for wellhead sealing that eliminates the possibility of the output of the electrolyte in the annular space.

To prevent opylitelei box 4 for sealing all terminals and connection cable.

In order to prevent the escape of water through the injector, it is pressurized through valve 5.

An example of a specific application of the inventive electrode-injector are testing on mine "October" IB "Donetsk coal" where were experimental work on electrochemical backfill. To perform these works were made 20 electrodes-injectors.

From the bottom output wells were drilled in two rows at a depth of 16 m In well established composite electrodes-injectors.

On the hydraulic system was carried out through the anode injection in the soil solution of the electrolyte on the basis of sodium silicate on for the recipe.

From the rectifiers to the electrodes was applied constant electric current.

Electrochemical plugging was performed continuously for 72 h, while the specific energy consumption is not exceeded 80,0 kW.h/m3.

Throughout the period of performance of electrochemical plug electrodes-both showed high reliability in operation.

The electrode-injector for electrochemical bridging rocks, including housing in the form of a tubular rod with the perforated napsnet cement works in a hazardous environment, the electrode-injector equipped with a bunching device and explosion-proof junction box, and a tubular rod electrode is made integral with its lower part made of conductive material, and the upper part consists of sections of tubular rods, covered with an insulator, and is supplied with a check valve.

 

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