The method of stabilization of underground formations (options) and composition for stabilizing subterranean formations

 

(57) Abstract:

The method of stabilization of underground formations, including the introduction of a stabilizing composition in the subterranean formation, for example, by pumping through cracks and crevices present in the formation, and injection into these cracks and aging stabilizing composition before curing, which results in the stabilization of the formation. The stabilizing composition includes neoshibayus polyester resin, catalyst and various additives and fillers. 4 N. p. and 19 C.p. f-crystals, 9 PL.

The invention relates to stabilizing compositions that can be injected into cracks and fissures in subterranean formations and to methods of stabilizing subterranean formations to prevent collapse of the roof, flooding.

In the mining industry, especially in coal mines in the developed reservoir usually cut down one or more tunnels or inputs. One known method that is called by way of a longwall panel, raw cut excavation Shearer or plow from the wall of the shaft and is removed by a conveyor or other device up until the extracting mechanism will not move to the desired distance into the formation. According to Lusatia and falls into the pit. Thus, each time the plow removes part of the wall, the supports for the roof and the conveyor or other device for removal of production move towards a new wall or surface, the roof in the direction opposite to the advancing plane, crumble. See, for example, the description of the extraction with the use of a longwall panel source [1].

You have already used a number of ways to prevent the fall of the roof in underground formations. Usually to create support structures that protect the roof in the mine, which are in direct contact with the structure, from the fall of the use or wooden frame or anchor bolts.

Mounting wood is used for construction of the frame on the periphery of the shaft, which forms a supporting structure. When using anchor bolts in underground formations to drill a hole which is filled with self-hardening composition for fixing anchor bolt. Typically, such self-hardening composition put in a container containing the resin and the catalyst. For example, in U.S. patent N 4260699 described polyester adhesive system and method of its use in the container containing the resin and the catalyst.

However, vysheukazannye to stabilize formations stabilizing composition, injected into cracks and crevices of the underground formations. To stabilize and strengthen the roof and walls of the formation has been used in various compositions. Have been proposed many stabilizing systems - from simple cement based to complex, relatively expensive systems based gel containing a water-soluble copolymers of acrylamide and various phenol-formaldehyde resin.

Usually, however, the most stabilizing compositions not in a great success, because it is preferable that they contain relatively inexpensive components produced in large quantities, facilitate injection into cracks and fissures in the formation, stabilized bearing walls or other formations, turning them into stable, tough, water-resistant structure of considerable strength, would be resistant to shrinkage, overidealize for a relatively short, but a controlled period of time, and are relatively inert and non-toxic to avoid endangering operating personnel and not to pollute the environment surrounding formation.

To strengthen underground formations has been proposed to use a polyester composition, as well as many other systems based on other synthetic resins. For example, Enya system, described in these patents have the disadvantage of a tendency to shrinkage, which can lead to catastrophic destruction of the underground formation.

To increase the ability of the walls of the shaft to withstand the pressure in cracks and crevices in the mine pumped well cementing systems based on polyurethanes. These polyurethane systems provide the desired strength and the desired stability stabilizing compositions. For example, in source [2] describes a method for strengthening geological formations by introducing a composition which reacts with the formation of the polyurethane in the formations. Typically, such reaction mixture containing polyisocyanate component, a polyol as one component and various auxiliary agents and additives.

Systems based on polyurethanes, however, are a threat to health and safety associated with the use of large quantities of isocyanates in confined underground spaces. As is known in the art, special problems arise with the release of toxic or noxious fumes, dust, etc., especially in the mining process. Such couples, the dust should be controlled or removed from the shaft, so as to avoid impacts on miners. To control these PA is a mix of ducts.

Thus, the compositions known from the prior art, and ways of using them, have one or more drawbacks, including short time of gelation or low speed curing, difficulties with injectionem in the underground formation, shrinkage, sensitivity to the environment during injection and curing and random selection. Therefore, there is a constant need to create a stabilizing compositions with improved properties and methods of stabilizing subterranean formations.

The object of this invention is a method of stabilizing a subterranean formation that includes the introduction of a stabilizing composition in the subterranean formation by pumping into the supporting walls of the specified formation and curing of the composition before curing, leading to the stabilization of the formation.

According to one variant of the present invention is claimed a method of stabilizing a subterranean formation that includes the introduction of a stabilizing composition into a subterranean formation and curing of the composition, leading to the stabilization of the formation, wherein the stabilizing composition is a wall based on an unsaturated polyester resin, which has disclosed a method of stabilizing a subterranean formation, which includes the introduction of a stabilizing composition into a subterranean formation, the curing of the composition, leading to the stabilization of the formation, wherein the stabilizing composition comprises neoshibayus synthetic resin containing thermoplastic microspheres.

According to the next result, this description is disclosed a method of stabilizing an underground faction, which includes the introduction of a stabilizing composition into a subterranean formation, the curing of this composition, leading to stabilization of the subterranean formation, wherein the stabilizing composition comprises desterrado MDI synthetic resin, which has a shrinkage of not more than 1% vol. from the beginning to fully cure.

The aim of the invention is a stabilizing composition for stabilizing the walls of the underground formations, such as mines.

The above objectives and other objectives, mainly distinctive features and aspects of the present invention will become apparent and the essence of the present invention more understandable from niesluchowski description and claims.

The method is as follows.

The method of stabilization underground is sustained fashion use the system on the basis of nusajaya polyester resin or other nusajaya resin, which cures at room temperature, it solidifies within the formation, providing its stabilization.

The term "stabilization" here mean increasing the strength of load-bearing walls, surfaces, etc. and/or sealing of walls, surfaces, etc. of such formations, which prevents, for example, the fall of the roof and the destruction of all formations, or part thereof and/or filling and/or an output or an input of various gases, etc., into such formations.

The term "stabilizing composition" means a composition which is suitable for stabilizing subterranean formations, for example, a composition that enhances the ability to carry a load bearing walls, surfaces, or etc., and/or the sealing wall surface or similar, which is pumped into the cracks and crevices of the specified formation as described below.

The term "capable of injection" means that the composition can easily be pumped under pressure into the cracks and fissures in subterranean formations using conventional pumps used by professionals. Thus, the stabilizing composition can be applied by injection into cracks and crevices where cures such stabilizing composition.

Most preference is of 13.7 kPa, and more preferably to a depth of at least 152 m under the pressure of 13.7 kPa, and more preferably, to a depth of at least 304 m under the pressure of 13.7 kPa

Accordingly, the stabilizing composition before curing have a viscosity suitable for injection, for example, through nozzles or hoses or other similar equipment which is typically used for use of such compositions. According to a preferred variant of the invention, the method of stabilizing a subterranean formation involves the application of a stabilizing composition having a viscosity of less than 30,000 JV, preferably less than 5000 SP, and most preferably less than 1000 SP, so that the composition can be easily injected into cracks and crevices in the underground formation.

According to one variant of the invention the stabilizing composition can contain neoshibayus unsaturated polyester resin, catalyst system, and preferably one or more organic or inorganic fillers. The term "nusajaya" resin means a composition containing unsaturated polyester resin, which is resistant to shrinkage by more than 1% vol. from start to finish curing. Predpochtitel about 0.1. %. Most preferred are those resins which no shrinkage. However, you can use system-based resins with a relatively low shrinkage, i.e., shrinkage of less than 1 vol.%. System nusajaya resin may also include a mixture expanding and shrinkable resin, when the shrinkage of the shrinkable resin is compensated by the expansion of the expanding resin. Of course, such a mixture would fall under the definition newagemusic only when the polyester and the entire composition is based shrinkage is not more than 1 vol.%. In addition, the phrase "based system nusajaya polyester resin" means various binary and ternary copolymers, etc., which possess the desired low shrinkage.

According to another variant of the invention, the system is based on nusajaya resin may also contain a polyester resin and a thermoplastic microspheres used in a quantity sufficient to prevent shrinkage of the composition during curing. It is known that conventional curing synthetic resin is exothermic. Can be used with other systems based on nusajaya resins mixed with polyester resin or without it. It is possible to use other systems of the resins with the position, which when cured produce enough heat to cause expansion of the microspheres. However, it is preferable not to use polyurethane system.

In each of the above cases, it is preferable to use systems that do not contain or contain practically no isocyanates. More preferably as nusajaya resins to apply systems based on polyester resins. The preferred system based on nusajaya polyester resins are sold under the trademark Polylitecompany Reichhold's Chemicals, Inc. Particularly preferred resins include Reichhold's Polylite31520-05 RTM (unsaturated polyester resin) used in the processes of injection molding liquid composites, when it is desirable obtain molded parts with low shrinkage and low deformation and/or parts of class A.

In table. 1-3, the characteristics of the product, typical properties utverzhdenii resin and typical mechanical property Polylite31520-05 PTM produced by Reichhold specified in Product Bulletin.

Other types of polyester-type systems Polylitesuitable for use in the present invention include Polylite31520-10, Polylitethe, preferably, the composition, representing or mixture of resins or only polyester resin, expanded slightly. As in the case of shrinkage, expansion of the stabilizing composition can be harmful. Thus, in certain cases it is preferable to use a system based on pressurewise polyester resin. The term pressuresare mean the system on the basis of polyester resin, which extends not more than 1% vol. from start to finish curing. In fact, it is preferable that the polyester resin was not extended.

In other cases it may be desirable to use an expanding (foaming) of the composition. Such foaming compositions included in the concept of "newagemusic" resin. Such compositions can be prepared, for example, with the use of thermoplastic microspheres in compositions. Thermoplastic microspheres can be used in systems based on polyester, acrylic, epoxy and polyurethane resins that produce enough heat during curing to cause expansion of the microspheres. Preferably increased from 0 to 10%, most preferably from 2 to 5%.

Catalysis is newagemusic systems. It is preferable to use the catalyst in an amount of 0.1-0.5 wt.%, preferably 1-2 wt.% based on the weight of resin.

The preferred catalyst system for use in polyester compositions include a catalytic system containing an organic peroxide. Examples of such organic peroxides include benzoyl peroxide, semiproletariat, semiproletariat, di-(verbatim)PEROXYDICARBONATE, di(2-ethylhexyl)PEROXYDICARBONATE, treatmentpreventionmost, tertBUTYLPEROXY, tryamericanspirit, tributylphosphate, tryamericanspirit, tertBUTYLPEROXY, peroxide di-isononanol, 2,5-dimethyl-2,5-di-(2 - ethylhexanoylperoxy)hexane, traceminerals-2 - ethylhexanoate, tertBUTYLPEROXY-2-ethylhexanoate, perefer/panketal, tributylphosphorotrithioate, 1,1-bis(tertBUTYLPEROXY)cyclohexane, tertBUTYLPEROXY-2-ethylhexylcarbonate, tertBUTYLPEROXY-2-methylbenzoate, tertbutyloxycarbonyl, treatmentpurchase, tertBUTYLPEROXY, ketone peroxide, peroxide Dicumyl, tertBUTYLPEROXY, di-tertbutylphenol, streamingjapanese, Gidropress has been studied. Preferred catalysts include catalysis is commonly used organic peroxide is stable at room temperature, as with other catalytic systems, it may be preferable to use one or more accelerators or promoters catalysts. The composition of the stabilizing compositions you can add any accelerator or promoter catalyst from a number of well-known experts in this field. Such additives include, without limiting the scope of the invention) accelerators of the type of cobalt naphthenate or octoate cobalt accelerators of the type of tertiary amines, vanadium accelerators, the accelerators of the type naphthenate or octoate manganese and type of Quaternary ammonium salts. It is preferable to use the accelerator in an amount of 0.1-5 wt.%, preferably 0.5 to 4 wt.%, more preferably 1-2 wt.% based on the resin.

In addition to nusajaya polyester system or other newagemusic systems and catalytic systems stabilizing composition according to this invention preferably includes one or more inert organic or inorganic fillers. The preferred filler is calcium carbonate. Of course, you can use other fillers well known in the art, such as sand and glass. In some cases, fillers can be used in the tar. In other cases, the fillers may be used in excess of 50 wt.%, preferably more than 75 wt.%, still more preferably 100 wt.% and most preferably more than 120 wt.% based on the resin. But found that adding too much filler can adversely affect the viscosity stabilizing composition, making it unsuitable for injection into cracks and crevices of the underground formation. In addition, the introduction of too many filler can make the composition unsuitable for stabilizing subterranean formations, because it will not have sufficient strength. Of course, experts can easily identify the amount of filler that can be used by the method in accordance with this invention.

The stabilizing compositions of this invention may also include any of the additives, such as softeners, agents for preventing precipitation, etc., particularly preferred additives include polymerization inhibitor, an adhesion promoter and/or a wetting agent.

Preferred polymerization inhibitors include hydroquinone and additive type tertbutylamine. Preferably the stabilizing composition on the ptx2">

Preferred adhesion promoters include the promoters of type organosilanes (methacrylate or vinyl). Preferably the stabilizing composition comprises an adhesion promoter in an amount of from 0.01 to 2%, preferably 0.1 to 1.5% and most preferably 0.25 to 1.0% of the weight of resin.

Preferred wetting include surface-active polyacrylates and polyalkylene-modified methylpolysiloxanes. Preferred wetting agents include inhibitor in an amount of 0.01-2%, preferably 0.1 to 1.5% and most preferably 0.25 to 1.0% of the weight of resin.

As indicated above, a typical stabilizing composition according to this invention may include an effective amount nusajaya polyester composition or other nusajaya polymeric composition and based on the weight of resin of at least 20% inert filler, 0.5 to 5% of catalyst, from 0.5 to 5% promoter catalyst, less than 5% of a softener, less than 1% of the agent for preventing precipitation, less than 2% of adhesion promoter, less than 2% of wetting agent, less than 2% of the inhibitor and less than 3% water.

As noted above, the stabilizing composition used for stabilizing underground formations can easily be injected into cracks and crevices in the underground the system, in which all components are mixed in a static mixing head to introduction into the subterranean formation. Experts know the different types of pumps and equipment and methods of injection.

One such method may include drilling a hole in the roof of the mine, consisting, for example, from a layer of contaminated coal, which are different layers of sandy shale. In addition, the stabilizing composition of this invention can be injected through the nozzle until then, until it can be injected into this area, or up until the stabilizing composition begins to seep from the neighboring holes.

The following examples only illustrate the invention, they in no way limit the scope of the present invention, these examples and other equivalents will become more apparent to experts in the light of the present invention.

In the examples refers to the testing of mechanical properties. These tests were used to get the index of the strength of stabilizing compositions described in the examples. The method of determination included placement of the rebar threaded N 6 in the center of the steel tube with an outer diameter of 1.5 inches (38 mm), ASTM in the annular gap of the steel tube so that to form free from voids 10-inch chemical anchor. Rebar was several inches longer than chemical anchors to be attached to a load device. After pouring the stabilizing composition in a steel tube was its gelation and then curing for one hour. Then to a reinforcing rod has applied load for testing the strength of the chemical anchors by measuring the displacement of the rod at a certain load. The specified offset is the total displacement minus a constant offset of the rod. It is believed that the destruction of chemical anchor occurs when there is a displacement of the rod, equal to 0.1 inch (2.54 mm).

Comparative example 1. Mix equal parts of isocyanate ELASTOCAST8000u and polyurethane resin ELASTOCAST8000u produced MILES Corp. About 70 ml of a mixture used to prepare four samples as described above.

The results are given in table. 4.

Table 4

The results determine the strength of unfilled polyurethane composition*< / BR>
Sample - strength, t

1 - 10,5

2 - 8,5

3 - 9,0

4 -

*one of obrascenija strength equal to 9.3 t - (according to the described method).

Example 2. Get neoshibayus stabilizing the composition by mixing at room temperature three components 60 g of unsaturated polyester resin Polylite31520-05, Reichhold Chemicals Inc.), 0.6 g of benzoyl peroxide SUPEROX, 46-750, Reichhold Chemicals Inc.) and 0.6 g of a solution of the promoter cobalt/amine (PROMOTER SOLUTION 46-558-00, Reichhold Chemicals Inc).

Composition jellium more than 60 C. the Cured product was white, was very solid on the surface appeared a few cracks.

Example 3. Prepare full neoshibayus stabilizing the composition by mixing at room temperature four components: 66,7 g of unsaturated polyester resin Polylite31520-05, Reichhold Chemicals Inc), 20.7 g of talc, 0.8 g of benzoyl peroxide SUPEROX, 46-750, Reichhold Chemicals Inc.) and 0.7 g of a solution of the promoter cobalt/amine (PROMOTER SOLUTION 46-558-00, Reichhold Chemicals Inc).

Composition jellium more than 60 C. the Cured product was a white, very solid and compared with the composition in comparative example 1 is characterized by a significantly large number of surface cracks. Compared with the composition in example 2, a significant increase in viscosity occurs.

31520-05, Reichhold Chemicals Inc.), a 30.7 g of talc, 0.9 g of benzoyl peroxide SUPEROX, 46 - 750, Reichhold Chemicals Inc.) and 0.9 g of the solution of the promoter cobalt/amine (PROMOTER SOLUTION 46-558-00, Reichhold Chemicals Inc).

Composition jellium 40 C. the Cured product was a white, very solid and has significantly more surface cracks than the product in example 3. Compared with the compositions according to examples 2 and 3, there is a significant increase in viscosity.

Examples of 3.4 show that newagemusic system can be filled with an inert filler. Example 4 shows that the filler can reduce the gelation time. Although the surface cracking increased with increasing amount of filler, I think that cracking due to the presence of impurities in the powder.

Example 5. Prepare full neoshibayus stabilizing the composition by mixing unsaturated polyester resins Polylite31520-05, Reichhold Chemicals Inc.) and 100% by weight of the resin of calcium carbonate (SNOWFLAKETMPE10, ECC American, Inc.), 0.5 wt.% inhibitor of polymerization (10% TBC-tertbutylcalix, Reichhold Chemicals Inc.), 1.5 wt.% promoter cobalt/amine (PROMOTER SOLUTION 46-558-00, Reichhold Chemicals, Inc.) and 1.5 wt.% catalyst ( SUPEROX, 46-750, Reichhold Chemica jellium after 12 minutes

Example 6. Neoshibayus stabilizing prepared as in example 5, however, the polyester resin ( Polylite31520-05, Reichhold Chemicals, Inc.) contains a wetting agent. Composition jellium in 24 min and has a shrinkage of less than 1%.

Example 7. Prepare neoshibayus stabilizing composition as in example 5, but polyester resin ( Polylite31520-05, Reichhold Chemicals Inc. contains an adhesion promoter (BYK A501, BYK Chemit). Composition jellium through 26 minutes and gives relatively little shrinkage <1%.

The results are given in table.

As can be seen from the data table. 5, the composition of the polyester resin containing or wetting or adhesion promoter, have greater strength, i.e., are characterized by lower values of bias compared with the composition containing only polyester resin.

Examples 8-10. Receive the same composition as example 6, but the amount of 10% TBC reduced to 0.5 wt.%, 0.3 wt.% and 0 wt.% in examples 8-10, respectively. Composition heliroute after 15 min, 7 min and 10-15, respectively. From compositiontarget test, as explained above.

The results are given in table. 6

As can be seen from the data table.6, the composition not containing 10% TBC has a greater offset than the compositions containing up to 0.5 wt.% 10% TBC. However, bias or lack of it are not directly dependent on the amount of added 10% TBC. The sample containing only 0.3 wt.% 10% TBC, characterized by a large shift compared with the sample containing 0.5 wt.% 10% TBC.

Examples 11-12. Prepare neoshibayus stabilizing the composition by mixing the unsaturated polyester resin ( Polylite31520-05, Reichhold Chemicals, Inc.) with particles of limestone size MC (GBl mun, Franklin Industrial Minerals, Inc.) in the amount indicated below, based on the weight of resin with 0.25 wt.% inhibitor (10% TBC), with 1.5 wt.% solution of the promoter (PROMOTER SOLUTION 46-558-00, Reichhold Chemicals, Inc.) and 1.5 wt.% catalyst ( SUPEROX, 46-750, Reichhold Chemicals, Inc.). In example 11 was added 100 wt.% limestone, the composition has a gelation time of 4 minutes In example 12 enter 120 wt.% limestone, resulting in compositions with a gelation time of 4 minutes

The compositions obtained in examples 11-12, otverzhdajutsja within 1 h after gelation. Then tested bribery 13-15.

Get neoshibayus stabilizing the composition by mixing unsaturated polyester resins with the following additives, based on the resin of 100 weight. % of calcium carbonate (SNOWFLAKETMPE#10), 0.25 wt.% inhibitor (10% TBC), 1.5 weight. % promoter (PROMOTER SOLUTION 46-558-00) and 1.5 wt.% catalyst ( SUPEROX, 46-750). In example 13, unsaturated polyester resin Polylite31520-05) contains a wetting agent. In example 14 unsaturated polyester resin ( Polylite31520-05) contains an adhesion promoter. In example 15 the unsaturated polyester resin contains a 50/50 mixture of resins used in examples 13 and 14. The gelation time of the compositions is 3.5-4 min, 6 and 4 min, respectively.

Of the compositions according to examples 13-15 prepare samples and utverjdayut them within 1 hour after gelation. Then, each sample is tested as described above.

The results are given table. 8.

Examples 16, 17 and comparative examples 18, 19.

Get filled with the stabilizing composition by mixing the resin with the following additives, based on the resin is 100 weight% calcium carbonate (SNOWFLAKETMPE# 10), 0.25 wt.% inhibitor (10% TBC),1,5 wt.% promoter (PROMOTER SOLUTION 46-558-00) and 1.5 wt.% catalyst ( SUPEROX31520-05, one resin contains a wetting agent. In examples 18 and 19 of the synthetic resin is a polyurethane ( ELASTOCAST8000u). In examples 17 and 18 steel tube pretreated by passing 15 ml of tap water on the walls for 5 minutes before pouring the resin composition into a tube. The gelation time of the compositions is 4, 7, 1, and 1 min, respectively.

Samples of the compositions according to examples 16 to 19 give Tvarditsa within 1 h after gelation. Then, each sample is tested.

The results are given in table. 9.

As can be seen from the data table. 9, the polyurethane composition is placed in a steel tube, the pre-treated water, collapsed prematurely, while stabilizing composition containing neoshibayus polyester resin, not prematurely destroyed. This shows that the composition containing neoshibayus polyester resin has better stability with respect to water.

From the above description, the person skilled in the art can easily appreciate the essential features of the present invention and, without departing from the scope and the scope of the invention, to make different what the conditions. These changes and/or modifications, respectively, are the equivalent of the interest claimed in the following claims.

1. The method of stabilization of underground formations, which consists in the introduction of a stabilizing composition containing the catalyst, in a load-bearing wall formation by injecting into the said wall and exposure of the composition to curing, leading to stabilization of load-bearing walls, characterized in that the use of a composition comprising a system based on unsaturated polyester resin, which has a shrinkage of not more than 1% vol. from start to finish curing.

2. The method of stabilization of underground formations, which consists in the introduction of a stabilizing composition in weight-bearing wall formation by injecting into the said wall and exposure of the composition to curing, leading to stabilization of load-bearing walls, characterized in that the use of a composition comprising a system based on synthetic resin, which has a shrinkage of not more than 1% vol. from start to finish curing, and nusajaya system based on synthetic resin contains a thermoplastic microspheres.

3. The method of stabilization of underground formations, which consists in the introduction of the composition to curing, leading to stabilization of load-bearing walls, characterized in that use composition that includes not containing polyisocyanate synthetic resin, which has a shrinkage of not more than 1% vol. from start to finish curing.

4. The method according to p. 1, characterized in that the composition is injected into the underground formation to a depth of at least 30,5 m

5. The method according to p. 1, characterized in that the use of a stabilizing composition comprising one or more inert fillers.

6. The method according to p. 5, characterized in that as the inert filler is used, the calcium carbonate.

7. The method according to p. 5, characterized in that the use of a composition containing a specified filler in the amount of about 15 to 120% by weight of the resin.

8. The method according to p. 1, characterized in that use polyester composition with a viscosity of less than 30,000 centipoise.

9. The method according to p. 8, characterized in that use polyester composition with a viscosity of less than 5000 centipoise.

10. The method according to p. 1, characterized in that the use of a polyester composition containing the polyisocyanate.

11. The method according to p. 1, characterized in that the use of a stabilizing composition, gelling in accordance with the persons under item 1, characterized in that the use of a stabilizing composition, cured for 1 h from the time of introduction into the supporting wall.

13. The method according to p. 1, characterized in that the use of a stabilizing composition, optionally containing inhibitor, an adhesion promoter and/or an agent for preventing precipitation.

14. The method according to p. 13, characterized in that the use of a stabilizing composition comprising an inhibitor in the amount of approximately 0.1 - 2% by weight of the resin.

15. The method according to p. 14, characterized in that the use of a stabilizing composition comprising an adhesion promoter in an amount of about 0.01 to 2% by weight of the resin.

16. The method according to p. 14, characterized in that use composition comprising an agent that prevents the deposition, in the amount of about 0.01 to 2% by weight of the resin.

17. The method according to p. 1, characterized in that the use of a stabilizing composition comprising a polyester resin, which has a shrinkage of not more than about 1. % from beginning to end cure-containing thermoplastic microspheres.

18. The method according to p. 1, characterized in that the use of a stabilizing composition comprising an effective stabilizing amount of Polief the malls at least 20% inert filler, approximately 0.5 - 5% catalyst, about 0.5 - 5% promoter catalyst, less than 5% of a softener, less than 1% of the agent for preventing precipitation, less than 2% of adhesion promoter, less than 2% of wetting agent, less than 2% of the inhibitor and less than 3% water.

19. The method according to p. 1, characterized in that the stabilizing composition is injected into cracks and crevices in the supporting walls of the underground formations through the nozzle.

20. The method according to p. 1, characterized in that the use of a stabilizing multi-component composition, obtained by blending the components prior to introduction into the supporting wall.

21. The method according to p. 4, characterized in that the composition is injected into the load-bearing wall to a depth of 30.4 - 608 m

22. The method according to p. 4, characterized in that the composition is injected into the load-bearing wall to a depth of 152 -304 m

23. Composition for stabilizing subterranean formations, characterized in that it comprises an effective stabilizing amount of unsaturated polyester resin, which has a shrinkage of not more than 1% vol. from start to finish curing, and contains calculated on the weight of resin of at least 20% of an inert filler, about 0.5 - 5% catalyst, about 0.5 - 5% promoter catalyst, less than 5% of a softener, emenee 3% water and the amount of thermoplastic microspheres, sufficient to prevent shrinkage during curing.

 

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