Mine ecological restoration spray seeding engineering fiber containing glue and preparation method and application thereof

Abstract

The present application relates to the technical field of plant fiber material and mine greening, and provides a mine ecological restoration spray seeding engineering fiber containing glue and a preparation method and application thereof.The mine ecological restoration spray seeding engineering fiber containing glue is prepared by mixing and drying a natural green plant polysaccharide glue coupling agent and a green fiber prepared by high-temperature and high-pressure cooking, dyeing and hot grinding.The mine ecological restoration spray seeding engineering fiber containing glue provided by the present application significantly improves the restoration spray seeding construction efficiency, forms a new integrated product through physical and chemical processing processes from originally independent and separated multiple raw materials, and simplifies the complex and complicated multi-step construction operation into a simple one-step construction operation, thereby significantly reducing the auxiliary operation time of the spray seeding operation, improving the work efficiency, shortening the construction period and reducing the construction cost.

Description

Technical Field

[0001] This invention relates to the fields of plant fiber materials and mine greening technology, specifically to a spray-seeded engineered fiber for mine ecological restoration, its preparation method, and its application. Background Technology

[0002] Hydroseeding is a mechanized spray seeding technology suitable for greening mine slopes. The sprayed material is a mixed slurry, and the main ingredients include plant seeds, wood fiber, natural plant polysaccharide crosslinking agent, natural water-retaining agent, antiseptic and antibacterial agent, pH adjuster, fertilizer, etc.

[0003] In actual hydroseeding greening projects, operators need to add various ingredients to the mixing tank in a specific order and at specific mixing times within the confined space of the hydroseeding vehicle. This process often results in problems such as reversed or disordered ingredient addition, omissions, insufficient mixing time, unsatisfactory mixing effects, and failure to meet requirements for slurry viscosity, drag reduction, pH, and solids content, leading to substandard hydroseeding restoration and establishment results. Summary of the Invention

[0004] The purpose of this invention is to provide a method for preparing and applying a resin-containing engineering fiber for hydroseeding in mine ecological restoration.

[0005] To achieve the objective of this invention, in a first aspect, this invention provides a method for preparing a natural green plant polysaccharide crosslinking agent, comprising the following steps: (1) The endosperm of legume seeds is mixed with water. After the endosperm absorbs water and swells, it forms hydrated endosperm particles. The hydrated endosperm particles are cut into fine endosperm filaments by shearing force in a kneader. (2) The endosperm microfilaments were mixed with a natural green pigment solution to obtain green endosperm microfilaments; (3) The green endosperm microfilaments are mixed with antibacterial agent and pH adjuster to obtain green endosperm microfilaments, which are then dried and pulverized in sequence to obtain the final product.

[0006] Furthermore, (1) the volume of the endosperm hydrated particles is 5-6 times the original endosperm volume.

[0007] Furthermore, (1) the volume of the endosperm microfilaments is one-30 to one-40th of the original endosperm volume.

[0008] Furthermore, in (1), the endosperm of leguminous plant seeds is mixed with hot water at 79-99°C.

[0009] Furthermore, in (2), the natural green pigment solution is a 0.05-0.12% sodium copper chlorophyll solution.

[0010] Furthermore, the antibacterial agent in (3) is selected from at least one of the following aqueous solutions: sodium benzoate, potassium sorbate, calcium sorbate, p-hydroxybenzoic acid, lactic acid, oxalic acid, etc. For example, the antibacterial agent is one or two of sodium benzoate, potassium sorbate, calcium sorbate, p-hydroxybenzoic acid, lactic acid, oxalic acid, etc.

[0011] Furthermore, the concentration of the antibacterial agent is 0.03-0.1%.

[0012] Furthermore, in (3), the pH adjuster is selected from at least one of acetic acid, citric acid, malic acid, tartaric acid, succinic acid, etc.

[0013] Furthermore, (3) the moisture content of the endosperm filaments is 60%-70%, the diameter is 0.84-1.00 mm, and the length is 0.55-2.85 mm.

[0014] The legumes used in this invention may be selected from at least one of the following: fenugreek, soapberry, wild soapberry, soapberry, long bean, locust, sesbania, guar bean, pagoda tree, and cassia seed.

[0015] Secondly, the present invention provides a natural green plant polysaccharide crosslinking agent prepared according to the method described above.

[0016] Furthermore, the moisture content of the natural green plant polysaccharide crosslinking agent of the present invention is 12%-15%, and the fineness is 0.074-0.150mm.

[0017] Thirdly, the present invention provides a method for preparing adhesive-containing engineering fibers by spraying for ecological restoration of mines, wherein the natural green plant polysaccharide crosslinking agent is mixed with green fibers prepared by high temperature and high pressure cooking, hot grinding and dyeing and then dried to form an integral material. The preparation method of green fiber includes: selecting pine or poplar wood with a diameter at breast height of 15-20 cm, peeling, washing, and shaving it into sheets, then air-separating and sieving to remove long branches and fine wood powder, pre-cooking at a low temperature of 60-80℃ for 10-11 minutes in a cooking tank, and then cooking under high temperature and high pressure conditions of 197-203℃ and 1.4-1.6MPa for 1-1.5 minutes. Afterwards, it is processed into high-water-content wood fiber using a hot mill grinding disc; wherein the grinding disc diameter is 1000 mm and the rotation speed is 15. The machine operates at 00 rpm with a gap of 0.1-0.5 mm. A natural green pigment solution (such as a 0.05-0.12% chlorophyll copper sodium salt solution) is sprayed into the wood fiber through the fiber outlet pipe of the hot mill to complete the dyeing process. Subsequently, in the initial section of the hot air drying pipe, a natural green plant polysaccharide crosslinking agent is uniformly and stably added to the high-water-content wood fiber. The initial temperature of the hot air drying pipe is 160-230℃, the outlet temperature is 50-60℃, the length is 260 meters, the diameter is 1.2 meters, and the drying time is 13-15 seconds.

[0018] Furthermore, the drying conditions are: temperature 160-230℃, drying time 13-15s.

[0019] Furthermore, the wood fiber can be pine fiber and / or poplar fiber, with a length of 2.30-20.00 mm and a diameter of 0.075-1.700 mm.

[0020] Fourthly, the present invention provides a hydroseeding engineered fiber for mine ecological restoration prepared according to the method, the moisture content of which is 15%-17%.

[0021] Fifthly, the present invention provides the application of the aforementioned hydroseeding engineered fiber for mine ecological restoration in mine greening.

[0022] By employing the above technical solution, the present invention has at least the following advantages and beneficial effects: The colloid-containing engineering fiber provided by this invention for mine ecological restoration hydroseeding significantly improves the efficiency of hydroseeding construction. It integrates previously separate raw materials into a new, unified product through physical and chemical processing. This simplifies complex and cumbersome multi-step construction operations into a straightforward one-step process. It significantly reduces auxiliary work time, increases work efficiency, shortens the construction cycle, and lowers construction costs. Detailed Implementation

[0023] This invention addresses the issue of substandard slurry caused by the chaotic addition of various ingredients during the current hydroseeding restoration process. It provides a method for preparing and applying a hydroseeding fiber containing adhesive for mine ecological restoration.

[0024] The present invention adopts the following technical solution: This invention provides a method for preparing hydroseeding engineered fiber for mine ecological restoration, comprising the following steps and process conditions: (1) Staining reaction: The endosperm grains or flakes of natural leguminous plants such as fenugreek, soapberry, wild soapberry, soapberry, cowpea, long bean, locust, sesbania, guar bean, pagoda tree, and cassia seed are added to a kneader. The kneader is turned on for stirring, and the kneader is kept warm at a certain temperature. Then, a certain amount of hot water at a certain temperature is added. The endosperm quickly absorbs water and hydrates, expanding to 5-6 times its original volume. The endosperm changes from a dry and hard state to a wet and soft state. Under the strong shearing and twisting action of a pair of blades in the kneader, the endosperm is gradually cut from large particles into fine filaments, and the volume shrinks to 1 / 30 to 1 / 40 of the initial dry and hard state. The cell walls of the endosperm are basically destroyed, and the natural galactomannan contained in the cells breaks through the cell walls. At this time, natural green pigment, which has been dissolved in a certain amount of room temperature water beforehand, is added to the kneader. The active hydroxyl groups of the galactomannan side chains react with the pigment to complete the staining reaction, giving the endosperm a stable and firm green color.

[0025] (2) Antibacterial Adjustment Reaction: For the endosperm microfilaments that have completed the aforementioned staining reaction, one or two of the following substances, which are pre-dissolved in a certain amount of room temperature water: sodium benzoate, potassium sorbate, calcium sorbate, p-hydroxybenzoic acid, lactic acid, and oxalic acid, are added to a kneader. Simultaneously, the kneader is set to cool down, gradually reducing its temperature to room temperature. The endosperm galactomannan macromolecules absorb and swell through water absorption, incorporating the aforementioned antibacterial agents and pH adjusters (such as citric acid or acetic acid) into the middle of the macromolecular chains, completing the antibacterial adjustment reaction and giving the endosperm both antiseptic and antibacterial properties as well as pH-adjusting functions. At this point, the endosperm microfilaments have a moisture content of 60%-70%, a diameter of 0.84-1.00 mm, and a length of 0.55-2.85 mm.

[0026] (3) Primary drying and powdering: The endosperm filaments that have undergone the aforementioned antibacterial adjustment reaction are added to a super vortex mill for primary drying and pulverization. By adjusting the arrangement of several horizontal discs and vertical blades on the pulverizing rotor itself, the moisture content of the fine powder formed after passing through many staggered pulverizing chambers is 12%-15%, and the fineness is 0.074-0.150 mm. A natural green plant polysaccharide crosslinking agent is produced.

[0027] (4) Secondary drying and reaction with fibers: The plant polysaccharide crosslinking agent prepared above is transported to the wood fiber drying pipeline by the upper fan of a super vortex mill. It is mixed and reacted with green fibers (moisture content as high as 70%-80%) prepared by high temperature and high pressure cooking, hot grinding and dyeing. The wood fibers are mainly pine and poplar fibers, with a length of 2.30-20.00 mm and a diameter of 0.075-1.700 mm. The drying pipeline is 260 m long, the drying hot air temperature is 160-230℃, the drying time is 13-15 s, the initial moisture content of the wood fibers is 70%-80%, and the moisture content after drying is 15%-17%. The moment the plant polysaccharide crosslinking agent comes into contact with the wood fiber, the galactomannan macromolecules hydrate and swell upon contact with water, exhibiting adhesive properties that allow them to tightly bond with the rough surface of the wood fiber. In addition, the strong hydrogen bond reaction between the hydroxyl groups of cellulose glucose-based polymers and galactomannan-based polymers in the wood fiber completes the fusion of the two materials to form an integrated material, thus preparing the sprayed adhesive-containing engineering fiber for mine ecological restoration.

[0028] The following examples are used to illustrate the present invention, but are not intended to limit the scope of the invention. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art, and the raw materials used are all commercially available products.

[0029] The kneader used in the following examples was purchased from Shandong Longxing Chemical Machinery Group Co., Ltd., model 1000L, and the super vortex mill was purchased from Zhejiang Fengli Crushing Equipment Co., Ltd., model QWJ-30.

[0030] Example 1: Preparation method of resin-containing engineering fiber by hydroseeding for mine ecological restoration (1) Staining reaction: The endosperm grains or endosperm flakes of natural leguminous plants such as fenugreek, soapberry, mountain soapberry, soapberry, cowpea, long bean, locust, sesbania, guar bean, pagoda tree, and cassia seed are added to a kneader. The kneader is turned on for stirring, and the kneader is kept warm at a certain temperature. Then a certain amount of hot water at 95°C is added. The endosperm quickly absorbs water and expands to hydrate, and its volume first increases to 5-6 times its original size. The endosperm changes from a dry and hard state to a wet and soft state. Under the strong shearing and twisting action of a pair of blades of the kneader, the endosperm is gradually cut from large particles into fine filaments, and its volume shrinks to 1 / 30 to 1 / 40 of the initial dry and hard state. The cell walls of the endosperm are basically destroyed, and the natural galactomannan contained in the cells breaks through the cell walls. At this point, the natural green pigment (0.09% sodium copper chlorophyll solution) that has been pre-dissolved in a certain amount of room temperature water is added to the kneader. The active hydroxyl groups of the galactomannan side chain react with the pigment (the reaction temperature is controlled at 39°C) to complete the dyeing reaction, giving the endosperm a stable and firm green color.

[0031] (2) Antibacterial Adjustment Reaction: For the endosperm microfilaments that have completed the aforementioned staining reaction, sodium benzoate and p-hydroxybenzoic acid, pre-dissolved in a certain amount of room temperature water, with a total concentration of 0.09% (molar ratio of sodium benzoate to p-hydroxybenzoic acid 1:0.38), are added to a kneader. Simultaneously, the kneader is set to cool down gradually to room temperature. The endosperm galactomannan macromolecules absorb the aforementioned antibacterial agent and pH adjuster citric acid into the middle of the macromolecular chain through water absorption, hydration, and swelling, completing the antibacterial adjustment reaction and giving the endosperm both antiseptic and antibacterial functions as well as pH adjustment. At this point, the endosperm microfilaments have a moisture content of 60%-70%, a diameter of 0.84-1.00 mm, and a length of 0.55-2.85 mm.

[0032] (3) Primary drying and powdering: The endosperm filaments that have undergone the aforementioned antibacterial adjustment reaction are added to a super vortex mill for primary drying and pulverization. By adjusting the arrangement of several horizontal discs and vertical blades on the pulverizing rotor itself, the moisture content of the fine powder formed after passing through many staggered pulverizing chambers is 12%-15%, and the fineness is 0.074-0.150 mm. A natural green plant polysaccharide crosslinking agent is produced.

[0033] (4) Secondary drying and reaction with fibers: The plant polysaccharide crosslinking agent prepared above is transported to the wood fiber drying pipeline by the upper fan of a super vortex mill. It is mixed and reacted with green fibers (moisture content up to 80%) prepared by high temperature and high pressure cooking, hot grinding and dyeing. The wood fiber is mainly pine fiber, with a length of 2.30-20.00 mm and a diameter of 0.075-1.700 mm. The drying pipeline is 260 m long, the drying hot air temperature is 160-230℃, the drying time is 13-15 s, the initial moisture content of the wood fiber is 70%-80%, and the moisture content after drying is 15%-17%. The moment the plant polysaccharide crosslinking agent comes into contact with the wood fiber, the galactomannan macromolecules swell and hydrate upon contact with water, exhibiting adhesive properties that allow them to tightly bond with the rough surface of the wood fiber. In addition, the strong hydrogen bond reaction between the hydroxyl groups of cellulose glucose-based polymers and galactomannan-based polymers in the wood fiber completes the fusion of the two materials to form an integrated material, thus preparing the sprayed adhesive-containing engineering fiber for mine ecological restoration.

[0034] In this embodiment, the preparation method of green fiber (pine fiber) includes: selecting pine or poplar wood with a diameter at breast height of 15-20 cm, peeling, washing, and shaving into sheets, then air-separating and sieving to remove long branches and fine wood powder, followed by pre-cooking at a low temperature of 60-80℃ for 11 minutes in a cooking tank, and then cooking at a high temperature and high pressure of 197-203℃ and 1.4-1.6 MPa for 1.5 minutes. Afterwards, the fibers are processed into high-water-content wood fibers using a hot mill grinding disc. The grinding disc has a diameter of 1000 mm, a rotation speed of 1500 rpm, and a gap of 0.1-0.5 mm. A natural green pigment solution is sprayed into the wood fibers through the fiber outlet pipe of the hot mill to complete the dyeing process. Subsequently, a natural green plant polysaccharide crosslinking agent is uniformly and stably added to the high-water-content wood fibers at the beginning of the hot air drying pipe. The hot air drying duct has an initial temperature of 160-230℃, an outlet temperature of 50-60℃, a length of 260 meters, a diameter of 1.2 meters, and a drying time of 13-15 seconds.

[0035] Example 2: Preparation method of resin-containing engineering fibers by hydroseeding for mine ecological restoration (1) Staining reaction: The endosperm grains or flakes of natural leguminous plants such as fenugreek, soapberry, mountain soapberry, soapberry, cowpea, long bean, locust, sesbania, guar bean, pagoda tree, and cassia seed are added to a kneader. The kneader is turned on for stirring, and the kneader is kept warm at a certain temperature. Then a certain amount of hot water at 80°C is added. The endosperm quickly absorbs water and expands, and its volume first increases to 5-6 times its original size. The endosperm changes from a dry and hard state to a wet and soft state. Under the strong shearing and twisting action of a pair of blades of the kneader, the endosperm is gradually cut from large particles into fine filaments, and its volume shrinks to 1 / 30 to 1 / 40 of the initial dry and hard state. The cell walls of the endosperm are basically destroyed, and the natural galactomannan contained in the cells breaks through the cell walls. At this point, natural green pigment (0.05% sodium copper chlorophyll solution) that has been pre-dissolved in a certain amount of room temperature water is added to the kneader. The active hydroxyl groups of the galactomannan side chain react with the pigment. The reaction temperature is controlled at 35℃ to complete the dyeing reaction, giving the endosperm a stable and firm green color.

[0036] (2) Antibacterial Adjustment Reaction: For the endosperm microfilaments that have completed the aforementioned staining reaction, potassium sorbate and calcium sorbate, which have been pre-dissolved in a certain amount of room temperature water, with a total concentration of 0.05% (molar ratio of potassium sorbate to calcium sorbate is 1:0.29), are added to a kneader. Simultaneously, the kneader is set to cool down gradually to room temperature. The endosperm galactomannan macromolecules absorb and swell through water absorption, incorporating the aforementioned antibacterial agent and pH adjuster acetic acid into the middle of the macromolecular chain segments, completing the antibacterial adjustment reaction and giving the endosperm both antiseptic and antibacterial properties as well as pH adjustment functions. At this point, the endosperm microfilaments have a moisture content of 60%-70%, a diameter of 0.84-1.00 mm, and a length of 0.55-2.85 mm.

[0037] (3) Primary drying and powdering: The endosperm filaments that have undergone the aforementioned antibacterial adjustment reaction are added to a super vortex mill for primary drying and pulverization. By adjusting the arrangement of several horizontal discs and vertical blades on the pulverizing rotor itself, the moisture content of the fine powder formed after passing through many staggered pulverizing chambers is 12%-15%, and the fineness is 0.074-0.150 mm. A natural green plant polysaccharide crosslinking agent is produced.

[0038] (4) Secondary drying and reaction with fibers: The plant polysaccharide crosslinking agent prepared above is transported to the wood fiber drying pipeline by the upper fan of a super vortex mill. It is mixed and reacted with green fibers (moisture content up to 75%) prepared by high temperature and high pressure cooking, hot grinding and dyeing. The wood fiber is mainly poplar fiber, with a length of 2.30-20.00 mm and a diameter of 0.075-1.700 mm. The drying pipeline is 250-270 m long, the drying hot air temperature is 160-230℃, the drying time is 13-15 s, the initial moisture content of the wood fiber is 70%-80%, and the moisture content after drying is 15%-17%. The moment the plant polysaccharide crosslinking agent comes into contact with the wood fiber, the galactomannan macromolecules swell and hydrate upon contact with water, exhibiting adhesive properties that allow them to tightly bond with the rough surface of the wood fiber. In addition, the strong hydrogen bond reaction between the hydroxyl groups of cellulose glucose-based polymers and galactomannan-based polymers in the wood fiber completes the fusion of the two materials to form an integrated material, thus preparing the sprayed adhesive-containing engineering fiber for mine ecological restoration.

[0039] In this embodiment, the preparation method of green fiber (poplar fiber) includes: selecting pine or poplar wood with a diameter at breast height of 15-20 cm, peeling, washing, and shaving into sheets, then air-classifying and sieving to remove long branches and fine wood powder, followed by pre-cooking at a low temperature of 60-80℃ for 10 minutes in a cooking tank, and then cooking under high temperature and high pressure conditions of 197-203℃ and 1.4-1.6 MPa for 1.2 minutes. Afterwards, the fibers are processed into high-water-content wood fibers using a hot mill grinding disc. The grinding disc has a diameter of 1000 mm, a rotation speed of 1500 rpm, and a gap of 0.1-0.5 mm. A natural green pigment solution is sprayed into the wood fibers through the fiber outlet pipe of the hot mill to complete the dyeing process. Subsequently, a natural green plant polysaccharide crosslinking agent is uniformly and stably added to the high-water-content wood fibers at the beginning of the hot air drying pipe. The hot air drying duct has an initial temperature of 160-230℃, an outlet temperature of 50-60℃, a length of 260 meters, a diameter of 1.2 meters, and a drying time of 13-15 seconds.

[0040] Example 3: Application of hydroseeding with rubbery-containing engineered fibers in mine ecological restoration First, soil analysis needs to be conducted on the target work area for mine ecological restoration. Based on factors such as the planning requirements of the project site, climate conditions, altitude, orientation of the sunny and shady sides, slope steepness, temporary or permanent restoration, construction time, and soil conditions, suitable vegetation species should be selected. At the same time, the soil matrix should be prepared so that hydroseeding can be applied to slopes with stable rock and soil.

[0041] To achieve optimal soil cover, a specialized hydroseeding machine with fan-shaped nozzles (50-degree end) is required. During mixing, first fill the hydroseeder's tank to one-third capacity with water, then turn on the mechanical agitator. First, add low-density materials such as seeds, and while adding the rubber-containing fibers, continue to slowly pour water into the tank. The final ratio of rubber-containing fibers to water should be 22.7 kg / 316 liters. When the water level reaches 75% of the tank capacity, all the rubber-containing fibers should have been added. Continue adding water while agitating to completely dissociate the fibers from a compressed mass and ensure thorough hydration. This dissociation and hydration process should take at least 10 minutes; in colder regions, the mixing time needs to be increased. This is crucial for fully activating and hydrating the polysaccharide crosslinking agent to achieve sufficient viscosity. Next, add fertilizer and other remaining modifiers to form the slurry required for hydroseeding. Close the recirculation valve to minimize air ingress into the slurry. Reduce the agitator speed and begin spraying the cover using the fan-shaped nozzles at the end. Repeatedly spray the mixed slurry in opposite directions to achieve maximum ground coverage.

[0042] After hydroseeding is completed, the owner should be promptly informed of methods for protecting the sprayed area, prohibiting traffic or grazing in the area for a certain period. Professional personnel should conduct necessary inspections and maintenance according to the project plan and specifications, and keep detailed records. Inspections and maintenance should also be carried out promptly after each major rainfall or other weather event that may cause damage. Re-spraying may be necessary if required.

[0043] When this rubber-containing fiber product is used at a rate of 3900 kg / ha for hydroseeding cover operations, it achieves the technical specifications shown in Table 1.

[0044] Table 1 Technical Specifications

[0045] Although the present invention has been described in detail above with general descriptions and specific embodiments, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, all such modifications or improvements made without departing from the spirit of the present invention fall within the scope of protection claimed by the present invention.

Claims

1. A method for preparing a natural green plant polysaccharide crosslinking agent, characterized in that, Includes the following steps: (1) The endosperm of legume seeds is mixed with water. After the endosperm absorbs water and swells, it forms hydrated endosperm particles. The hydrated endosperm particles are cut into fine endosperm filaments by shearing force in a kneader. (2) The endosperm microfilaments were mixed with a natural green pigment solution to obtain green endosperm microfilaments; (3) The green endosperm microfilaments are mixed with antibacterial agent and pH adjuster to obtain green endosperm microfilaments, which are then dried and pulverized in sequence to obtain the final product.

2. The method according to claim 1, characterized in that, (1) The volume of the hydrated particles in the mesosperm is 5-6 times the original volume of the endosperm; The volume of the endosperm microfilaments is 1 / 30 to 1 / 40 of the original endosperm volume; Mix the endosperm of leguminous seeds with hot water at 79-99℃.

3. The method according to claim 1, characterized in that, (2) The natural green pigment solution is a 0.05-0.12% sodium copper chlorophyllin solution; (3) The antibacterial agent is selected from at least one of the following substances in aqueous solution: sodium benzoate, potassium sorbate, calcium sorbate, p-hydroxybenzoic acid, lactic acid, oxalic acid; The concentration of the antibacterial agent is 0.03-0.1%; The pH adjuster is selected from at least one of acetic acid, citric acid, malic acid, tartaric acid, and succinic acid.

4. The method according to claim 1, characterized in that, (3) The moisture content of the mesoendosperm filaments is 60%-70%, the diameter is 0.84-1.00mm, and the length is 0.55-2.85mm.

5. The method according to any one of claims 1-4, characterized in that, The legumes selected are at least one of the following: fenugreek, soapberry, wild soapberry, soapberry, long bean, locust, sesbania, guar bean, pagoda tree, and cassia seed.

6. A natural green plant polysaccharide crosslinking agent prepared according to any one of claims 1-5, characterized in that, The moisture content is 12%-15%, and the fineness is 0.074-0.150mm.

7. A method for preparing adhesive-containing engineering fibers for hydroseeding in mine ecological restoration, characterized in that, The natural green plant polysaccharide crosslinking agent described in claim 6 is mixed with green fiber prepared by high-temperature and high-pressure cooking, hot grinding and dyeing, and then dried to form an integral material. The preparation method of green fiber includes: selecting pine or poplar wood with a diameter at breast height of 15-20 cm, peeling, washing, and shaving it into sheets, then air-separating and sieving to remove long branches and fine wood powder, pre-cooking at a low temperature of 60-80℃ for 10-11 minutes in a cooking tank, and then cooking under high temperature and high pressure conditions of 197-203℃ and 1.4-1.6 MPa for 1-1.5 minutes, followed by processing into high water content wood fiber through a hot mill grinding disc; wherein the grinding disc diameter is 10 mm. The machine operates at a speed of 1500 rpm and a gap of 0.1-0.5 mm. A natural green pigment solution is sprayed into the wood fibers through the fiber outlet pipe of the hot mill to complete the dyeing process. Subsequently, a natural green plant polysaccharide crosslinking agent is uniformly and stably added to the high-water-content wood fibers at the beginning section of the hot air drying pipe. The initial temperature of the hot air drying pipe is 160-230℃, the outlet temperature is 50-60℃, the length is 260 meters, the diameter is 1.2 meters, and the drying time is 13-15 seconds. The natural green pigment solution is a 0.05-0.12% sodium copper chlorophyllin solution.

8. The method according to claim 7, characterized in that, The drying conditions are: temperature 160-230℃, drying time 13-15s; The wood fiber is pine fiber and / or poplar fiber, with a length of 2.30-20.00 mm and a diameter of 0.075-1.700 mm.

9. The hydroseeding engineered fiber for mine ecological restoration prepared according to the method of claim 7 or 8, characterized in that, The moisture content is 15%-17%.

10. The application of the hydroseeding of adhesive-containing engineering fibers for mine ecological restoration as described in claim 9 in mine greening.

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