Silicate modified polyurethane material as well as preparation method and application thereof

Abstract

The invention provides a silicate modified polyurethane material as well as a preparation method and application thereof, and belongs to the technical field of reinforcing materials. The silicate modified polyurethane material provided by the invention comprises a component A and a component B, wherein the mass ratio of the component A to the component B is 1: 1; the component A comprises 40-60 parts of sodium silicate, 1-10 parts of a catalyst and 5-15 parts of glycerol; the component B is prepared from 70 to 80 parts of isocyanate, 5 to 15 parts of polyether polyol, 1 to 10 parts of epoxy resin, 1 to 5 parts of 3-bromopropyl isothiocyanate, 1 to 5 parts of plasticizer and 1 to 5 parts of solubilizer. The silicate modified polyurethane material provided by the invention has excellent cohesiveness to coal and rock masses, has relatively high compressive strength, and can be used for reinforcing the coal and rock masses.

Description

Technical Field

[0001] The invention relates to the technical field of reinforcement materials, and in particular to a silicate modified polyurethane material and a preparation method and application thereof. Background Art

[0002] Polyurethane materials have the advantages of fast reaction, fast and high strength growth, large secondary expansion diffusivity, high toughness and good permeability and diffusivity, and are used for grouting reinforcement in coal mines. However, polyurethane grouting reinforcement materials are expensive, have high material reaction temperature (140°C) and poor material flame retardancy. In order to solve the problems of polyurethane materials, studies have introduced cheap water glass components into the polyurethane system to form organic-inorganic hybrid materials, which can not only reduce product costs, but also improve the flame retardancy of polyurethane grouting materials through the introduction of silicon-oxygen-silicon bonds, overcoming the inherent defects of high reaction temperature and poor flame retardancy of polyurethane reinforcement materials. However, although the existing polyurethane / water glass composite materials can overcome the inherent defects of high reaction temperature and poor flame retardancy of polyurethane reinforcement materials, they have problems such as high hardness and low bonding strength with coal rock mass, which makes it difficult to ensure the reinforcement effect when polyurethane / water glass composite materials are used to reinforce coal rock mass.

[0003] Therefore, how to obtain a silicate-modified polyurethane material with high viscosity and high compressive strength with coal rock mass is a technical problem to be solved urgently in this field. Summary of the invention

[0004] The purpose of the present invention is to provide a silicate modified polyurethane material and a preparation method and application thereof. The silicate modified polyurethane material provided by the present invention has high bonding strength to coal rock mass and high compressive strength, and can be used to reinforce coal rock mass.

[0005] In order to achieve the above-mentioned object of the invention, the present invention provides the following technical solutions:

[0006] The present invention provides a silicate modified polyurethane material, which comprises a component A and a component B in parts by weight, wherein the mass ratio of the component A to the component B is 1:1;

[0007] The component A comprises: 40-60 parts of sodium silicate, 1-10 parts of catalyst and 5-15 parts of glycerol;

[0008] The B component comprises: 70-80 parts of isocyanate, 5-15 parts of polyether polyol, 1-10 parts of epoxy resin, 1-5 parts of 3-bromopropyl isothiocyanate, 1-5 parts of plasticizer and 1-5 parts of solubilizer.

[0009] Preferably, the modulus of the sodium silicate is 2.2-2.4, and the Baume degree of the sodium silicate is 50°.

[0010] Preferably, the catalyst comprises one or more of ZR-70, KAc, A33, DMP-30 and DMAEE.

[0011] Preferably, the model of the isocyanate is PM-200.

[0012] Preferably, the model of the polyether polyol includes one or more of DL-1000, DL-2000 and YD-6205.

[0013] Preferably, the epoxy resin type includes one or more of E44, E51 and WSR618.

[0014] Preferably, the plasticizer includes one or more of chlorinated paraffin, dibutyl phthalate, diisobutyl phthalate and di-sec-octyl phthalate.

[0015] Preferably, the solubilizer is of at least one of CO40 and polyethylene glycol.

[0016] The present invention also provides a method for preparing the silicate-modified polyurethane material described in the above technical solution, comprising the following steps:

[0017] (1) mixing sodium silicate, a catalyst and glycerol to obtain component A;

[0018] (2) Mix isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer, and conduct a pre-reaction to obtain component B.

[0019] The present invention also provides the use of the silicate-modified polyurethane material described in the above technical scheme or the silicate-modified polyurethane material prepared by the preparation method described in the above technical scheme in reinforcing coal rock mass, comprising: mixing component A with component B to obtain a mixed slurry; and injecting the mixed slurry into the coal rock mass for solidification.

[0020] The invention provides a silicate modified polyurethane material, which comprises an A component and a B component, wherein the mass ratio of the A component to the B component is 1:1; the A component comprises 40-60 parts of sodium silicate, 1-10 parts of a catalyst and 5-15 parts of glycerol; the B component comprises 70-80 parts of isocyanate, 5-15 parts of a polyether polyol, 1-10 parts of an epoxy resin, 1-5 parts of 3-bromopropyl isothiocyanate, 1-5 parts of a plasticizer and 1-5 parts of a solubilizer. The present invention uses sodium silicate to modify polyurethane, which can reduce the cost of polyurethane materials and improve flame retardancy; the present invention adds glycerol to improve the compatibility of each component, and glycerol and 3-bromopropyl isothiocyanate can form hydrogen bonds with various components in coal rock mass, and when used to reinforce coal rock mass, the bonding ability with silicate modified polyurethane material can be enhanced; the present invention uses -OH in epoxy resin to react with -NCO in isocyanate structure, and introduces epoxy resin into silicate modified polyurethane material, which can significantly improve the mechanical properties of silicate modified polyurethane material and has high compressive strength; the present invention adds 3-bromopropyl isothiocyanate, and after it is introduced into silicate modified polyurethane, bromine can coordinate chemically with various components in coal rock mass, which significantly enhances the bonding between silicate modified polyurethane material and coal rock mass. The results of the embodiment show that the silicate modified polyurethane material provided by the present invention has excellent bonding to coal rock mass, and has high compressive strength, and can be used to reinforce coal rock mass. DETAILED DESCRIPTION

[0021] The present invention provides a silicate modified polyurethane material, which comprises a component A and a component B in parts by weight, wherein the mass ratio of the component A to the component B is 1:1;

[0022] The component A comprises: 40-60 parts of sodium silicate, 1-10 parts of catalyst and 5-15 parts of glycerol;

[0023] The B component comprises: 70-80 parts of isocyanate, 5-15 parts of polyether polyol, 1-10 parts of epoxy resin, 1-5 parts of 3-bromopropyl isothiocyanate, 1-5 parts of plasticizer and 1-5 parts of solubilizer.

[0024] In the present invention, unless otherwise specified, the raw materials used in the present invention are all commercially available products in the art.

[0025] The silicate-modified polyurethane material provided by the present invention comprises component A in parts by weight.

[0026] In the present invention, the component A includes 40 to 60 parts of sodium silicate, preferably 45 to 55 parts. In some embodiments of the present invention, the weight proportions of the sodium silicate can be 40 parts, 45 parts, 50 parts, 55 parts, or 60 parts. In the present invention, the modulus of the sodium silicate is preferably 2.2 to 2.4, more preferably 2.2 to 2.3; the Baume degree of the sodium silicate is preferably 50°. The sodium silicate used in the present invention has good stability, so that the silicate-modified polyurethane material has good mechanical properties and flame retardancy.

[0027] Based on 40 to 60 parts by weight of sodium silicate, component A of the silicate-modified polyurethane material provided by the present invention includes 1 to 10 parts, preferably 2 to 8 parts, of a catalyst. In some embodiments of the present invention, the weight of the catalyst may be 1, 2, 3, 4, 5, 6, 7, 8, 9 or 10 parts.

[0028] In the present invention, the catalyst preferably includes one or more of ZR-70, KAc, A33, DMP-30 and DMAEE, more preferably one or two of ZR-70, KAc and DMAEE, and further preferably ZR-70 and KAc, and the mass ratio of ZR-70 and KAc is preferably 1:1. In an embodiment of the present invention, the ZR-70, KAc, A33, and DMP-30 are derived from Shanghai Yexing Industrial Co., Ltd., and the DMAEE is derived from Huntsman, USA. The present invention can shorten the curing time and improve the mechanical properties of silicate-modified polyurethane materials by adding a catalyst.

[0029] Based on 40 to 60 parts by weight of sodium silicate, the component A of the silicate-modified polyurethane material provided by the present invention includes 5 to 15 parts of glycerol, preferably 5 to 10 parts. In some embodiments of the present invention, the weight of the glycerol can be 5 parts, 6 parts, 8 parts, 10 parts or 15 parts. The present invention can improve the compatibility of each component by adding glycerol, and glycerol and 3-bromopropyl isothiocyanate can form hydrogen bonds with various components in the coal rock mass, and when used to reinforce the coal rock mass, the silicate-modified polyurethane material can enhance the bonding ability of the coal rock mass.

[0030] The silicate-modified polyurethane material provided by the present invention includes a B component in parts by weight.

[0031] In the present invention, the B component includes 70 to 80 parts of isocyanate, preferably 75 to 80 parts. In an embodiment of the present invention, the weight parts of the isocyanate can be 70 parts, 75 parts or 80 parts. In the present invention, the model of the isocyanate can be PM-200. In an embodiment of the present invention, the source of the PM-200 can be Wanhua Chemical Co., Ltd. The use of the above-mentioned isocyanate is beneficial to improve the compressive strength of the silicate-modified polyurethane material.

[0032] Based on 70 to 80 parts by weight of isocyanate, the B component of the silicate-modified polyurethane material provided by the present invention includes 5 to 15 parts of polyether polyol, preferably 5 to 10 parts. In some embodiments of the present invention, the weight parts of the polyether polyol can be 5 parts, 6 parts, 7 parts, 8 parts, 10 parts or 15 parts. In an embodiment of the present invention, the model of the polyether polyol preferably includes one or more of DL-1000, DL-2000 and YD-6205, more preferably DL-1000, DL-1000 or YD-6205. In an embodiment of the present invention, the source of the DL-1000, DL-2000 and YD-6205 can be Zibo Dexin Federal Chemical Industry Co., Ltd.

[0033] Based on 70 to 80 parts by weight of isocyanate, the B component of the silicate-modified polyurethane material provided by the present invention includes 1 to 10 parts of epoxy resin, preferably 2 to 8 parts. In some embodiments of the present invention, the weight parts of the epoxy resin can be 1 part, 2 parts, 5 parts, 6 parts, 8 parts or 10 parts. In the present invention, the model of the epoxy resin is preferably one or more of E44, E51 and WSR618, more preferably E44 or E51. In an embodiment of the present invention, the source of the epoxy resin can be a product of Nantong Xingchen Material Synthesis Co., Ltd. The present invention introduces epoxy resin into the silicate-modified polyurethane material, which can significantly improve the mechanical properties of the silicate-modified polyurethane material and has a higher compressive strength.

[0034] Based on 70 to 80 parts by weight of isocyanate, the B component of the silicate-modified polyurethane material provided by the present invention includes 1 to 5 parts of 3-bromopropyl isothiocyanate, preferably 2 to 5 parts. In some embodiments of the present invention, the weight of the 3-bromopropyl isothiocyanate can be 1 part, 2 parts, 3 parts, 4 parts or 5 parts. After the present invention adds 3-bromopropyl isothiocyanate and introduces it into the silicate-modified polyurethane, bromine can react with various components in the coal rock mass to form a coordination chemical reaction, significantly enhancing the adhesion between the silicate-modified polyurethane material and the coal rock mass.

[0035] Based on 70 to 80 parts by weight of isocyanate, the B component of the silicate modified polyurethane material provided by the present invention includes 1 to 5 parts of plasticizer, preferably 2 to 5 parts. In some embodiments of the present invention, the weight of the plasticizer can be 1 part, 2 parts, 3 parts, 4 parts or 5 parts. In the present invention, the plasticizer preferably includes one or more of chlorinated paraffin, dibutyl phthalate, diisobutyl phthalate and di-sec-octyl phthalate, more preferably chlorinated paraffin or dibutyl phthalate. Adding a plasticizer in the present invention can improve the flexibility and impact resistance of the silicate modified polyurethane material.

[0036] Based on 70 to 80 parts by weight of isocyanate, the B component of the silicate-modified polyurethane material provided by the present invention includes 1 to 5 parts of a solubilizer, preferably 2 to 5 parts. In some embodiments of the present invention, the weight of the solubilizer may be 1 part, 2 parts, 3 parts, 4 parts or 5 parts. In the present invention, the solubilizer is preferably at least one of CO40 and polyethylene glycol, more preferably CO40; the polyethylene glycol is preferably PEG-200 or PEG-400. Adding a solubilizer in the present invention is more conducive to uniform mixing with each component.

[0037] The present invention also provides a method for preparing the silicate-modified polyurethane material described in the above technical solution, comprising the following steps:

[0038] (1) mixing sodium silicate, a catalyst and glycerol to obtain component A;

[0039] (2) Mix isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer, and conduct a pre-reaction to obtain component B.

[0040] The sodium silicate, catalyst and glycerol of the present invention are mixed to obtain group A.

[0041] The present invention has no particular limitation on the method for mixing the sodium silicate, catalyst and glycerol, as long as the components can be mixed uniformly. In the present invention, the method for mixing the sodium silicate, catalyst and glycerol is preferably stirring. The present invention has no particular limitation on the stirring device, and any conventional stirring device can be used.

[0042] The invention mixes isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer, and performs pre-reaction to obtain component B.

[0043] The present invention has no particular limitation on the method for mixing the isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer, as long as the components are uniformly mixed. In the present invention, the method for mixing the isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer is preferably stirring. The present invention has no particular limitation on the stirring device, and any conventional stirring device can be used.

[0044] In the present invention, the temperature of the pre-reaction is preferably 60 to 80° C., more preferably 70 to 75° C.; the time of the pre-reaction is preferably 1 to 3 hours, more preferably 2 to 3 hours. In the present invention, a polyurethane prepolymer is formed by pre-reaction.

[0045] The present invention also provides the use of the silicate modified polyurethane material described in the above technical solution in reinforcing coal rock mass, comprising: mixing component A with component B to obtain a mixed slurry; and injecting the mixed slurry into the coal rock mass for solidification.

[0046] The present invention has no particular limitation on the method of mixing the component A and the component B, and the two components can be mixed evenly. In the present invention, the method of mixing the component A and the component B is preferably stirring.

[0047] After the mixed slurry is obtained, the present invention injects the mixed slurry into the coal rock mass for solidification.

[0048] In the present invention, the device for injecting the mixed slurry into the coal-rock mass is preferably a grouting pump. The present invention uses a grouting pump to inject the mixed slurry into the pores of the coal-rock mass.

[0049] In the present invention, the curing temperature is preferably room temperature, and the curing time is preferably 100 to 200 seconds, more preferably 150 to 200 seconds. The present invention can form a silicate-modified polyurethane material to fill the pores of the coal rock mass after the mixed slurry of component A and component B is cured, thereby reinforcing the coal rock mass.

[0050] The technical solutions in the present invention will be described clearly and completely below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0051] The raw materials used in the present invention are:

[0052] Sodium silicate: modulus is 2.4, Baume degree of sodium silicate is 50° (produced by Shandong Anquan Chemical Technology Co., Ltd.);

[0053] Catalyst: ZR-70, KAc and A33 (Shanghai Yexing Industrial Co., Ltd.), DMP-30 (Huntsman, USA);

[0054] Isocyanate: PM-200 (Wanhua Chemical Co., Ltd.);

[0055] Polyether polyols: DL-1000, DL-2000 and YD-6205 (Zibo Dexin Federal Chemical Industry Co., Ltd.);

[0056] Epoxy resin: E44, E51 and WSR618 (products of Nantong Xingchen Material Synthesis Co., Ltd.);

[0057] Solubilizer: CO40 (produced by Nantong Yongle Chemical Co., Ltd.).

[0058] The preparation method of the silicate modified polyurethane material in the embodiment of the present invention is:

[0059] (1) stirring sodium silicate, a catalyst and glycerol to obtain component A;

[0060] (2) isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer are stirred evenly and reacted at 90° C. for 3 hours to obtain component B.

[0061] Example 1

[0062] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0063] The component A is composed of 40 parts of sodium silicate, 5 parts of catalyst (ZR-70 and KAc are in a mass ratio of 1:1) and 5 parts of glycerol;

[0064] The B component is: 70 parts of PM-200, 6 parts of DL-1000, 2 parts of E44, 2 parts of 3-bromopropyl isothiocyanate, 2 parts of chlorinated paraffin and 1 part of CO40.

[0065] Example 2

[0066] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0067] The component A is composed of 45 parts of sodium silicate, 5 parts of catalyst (ZR-70 and KAc in a mass ratio of 1:1) and 6 parts of glycerol;

[0068] The B component is: 75 parts of PM-200, 8 parts of DL-200, 16 parts of E5, 3 parts of bromopropyl 3-isothiocyanate, 3 parts of dibutyl phthalate and 4 parts of CO4.

[0069] Example 3

[0070] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0071] The component A is: 50 parts of sodium silicate, 6 parts of catalyst DMP-30 and 10 parts of glycerol;

[0072] The B component is: 75 parts of PM-200, 8 parts of DL-2000, 15 parts of E5, 3 parts of bromopropyl 3-isothiocyanate, 3 parts of dibutyl phthalate and 4 parts of CO4.

[0073] Example 4

[0074] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0075] The component A is: 55 parts of sodium silicate, 8 parts of catalyst DMP-30 and 12 parts of glycerol;

[0076] The B component is: 80 parts of PM-200, 10 parts of DL-2000, 18 parts of E5, 4 parts of 3-bromopropyl isothiocyanate, 5 parts of dibutyl phthalate and 5 parts of CO40.

[0077] Comparative Example 1

[0078] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0079] The component A is composed of 40 parts of sodium silicate, 50 parts of catalyst (ZR-70 and KAc in a mass ratio of 1:1) and 5 parts of glycerol;

[0080] The B component is: 70 parts of PM-200, 6 parts of DL-1000, 2 parts of 3-bromopropyl isothiocyanate, 2 parts of chlorinated paraffin and 1 part of CO40.

[0081] Comparative Example 2

[0082] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0083] The component A is composed of 40 parts of sodium silicate, 50 parts of catalyst (ZR-70 and KAc in a mass ratio of 1:1) and 5 parts of glycerol;

[0084] The B component is: 70 parts of PM-200, 6 parts of DL-1000, 1-10 parts of E44, 2 parts of chlorinated paraffin and 1 part of CO40.

[0085] Comparative Example 3

[0086] A silicate-modified polyurethane material, which consists of a component A and a component B, and the mass ratio of the component A to the component B is 1:1.

[0087] The A component is: 40 parts of sodium silicate and a catalyst (ZR-70 and KAc in a mass ratio of 1:1);

[0088] The B component is: 70 parts of PM-200, 6 parts of DL-1000, 1-10 parts of E44, 2 parts of 3-bromopropyl isothiocyanate, 2 parts of chlorinated paraffin and 1 part of CO40.

[0089] Test Case

[0090] According to the above preparation method, components A and B are obtained from Examples 1 to 4 and Comparative Examples 1 to 3, respectively. After mixing components A and B evenly under stirring, they are poured into a mold for curing, and the performance tests of shear strength and compressive strength are performed. The sample size, preparation method and test method of the mechanical performance test refer to AQ1089-2011 "Polymer Materials for Reinforcement of Coal Rock Mass in Coal Mines"; the shear strength and compressive strength tests use a fully automatic pressure testing machine (YAW-300B, Jinan Liangong Testing Technology Co., Ltd.).

[0091] According to the above preparation method, the components A and B were obtained from Examples 1 to 4 and Comparative Examples 1 to 3, respectively. The components A and B were mixed evenly under stirring, injected into the coal rock mass and solidified. The film layer thickness on the surface after solidification was uniform, and then the bonding strength was tested using an electronic universal testing machine (CM T-20, Jinan Liangong Testing Technology Co., Ltd.). The results are shown in Table 1:

[0092] Table 1 Performance test results of silicate modified polyurethane materials of Examples 1 to 4 and Comparative Examples 1 to 3

[0093] Bonding strength Compressive strength Shear strength Example 1 4.6 59.2 32.2 Example 2 5.4 62.8 35.1 Example 3 4.5 63.9 33.8 Example 4 4.6 61.1 32.6 Comparative Example 1 2.9 39.1 20.1 Comparative Example 2 1.3 49 29.3 Comparative Example 3 2.5 51 30.3

[0094] As can be seen from Table 1, the present invention can significantly improve the mechanical properties of silicate-modified polyurethane materials by adding epoxy resin, because -OH in epoxy resin can react with -NCO in isocyanate structure, which can improve the mechanical properties of silicate-modified polyurethane materials. After the present invention introduces 3-bromopropyl isothiocyanate, bromine can react with various components in coal rock mass, which can enhance the adhesion between silicate-modified polyurethane materials and coal rock mass. Therefore, the silicate-modified polyurethane material provided by the present invention can be used to reinforce coal rock mass.

[0095] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A silicate-modified polyurethane material, comprising component A and component B, in weight proportion, wherein the mass ratio of component A to component B is 1:1; The A component comprises: 40-60 parts of sodium silicate, 1-10 parts of catalyst and 5-15 parts of glycerol; The B component comprises: 70-80 parts of isocyanate, 5-15 parts of polyether polyol, 1-10 parts of epoxy resin, 1-5 parts of 3-bromopropyl isothiocyanate, 1-5 parts of plasticizer and 1-5 parts of solubilizer.

2. The silicate-modified polyurethane material according to claim 1, characterized in that: The modulus of the sodium silicate is 2.2-2.4, and the Baume degree of the sodium silicate is 50°.

3. The silicate-modified polyurethane material according to claim 1, characterized in that: The catalyst includes one or more of ZR-70, KAc, A33, DMP-30 and DMAEE.

4. The silicate-modified polyurethane material according to claim 1, characterized in that: The model of the isocyanate is PM-200.

5. The silicate-modified polyurethane material according to claim 1, characterized in that: The models of the polyether polyol include one or more of DL-1000, DL-2000 and YD-6205.

6. The silicate-modified polyurethane material according to claim 1, characterized in that: The epoxy resin types include one or more of E44, E51 and WSR618.

7. The silicate-modified polyurethane material according to claim 1, characterized in that: The plasticizer includes one or more of chlorinated paraffin, dibutyl phthalate, diisobutyl phthalate and di-sec-octyl phthalate.

8. The silicate-modified polyurethane material according to claim 1, characterized in that: The solubilizing agent is of at least one of CO40 and polyethylene glycol.

9. The method for preparing the silicate-modified polyurethane material according to any one of claims 1 to 8, comprising the following steps: (1) mixing sodium silicate, a catalyst and glycerol to obtain component A; (2) Mix isocyanate, polyether polyol, epoxy resin, 3-bromopropyl isothiocyanate, plasticizer and solubilizer, and conduct a pre-reaction to obtain component B.

10. Use of the silicate-modified polyurethane material according to any one of claims 1 to 8 or the silicate-modified polyurethane material prepared by the preparation method according to claim 9 in reinforcing coal and rock mass, comprising: Mixing component A with component B to obtain a mixed slurry; The mixed slurry is injected into the coal rock mass for solidification.