Composite oil phase material for improving water resistance and explosion performance of porous granular ammonium nitrate fuel oil explosive

Abstract

The invention provides a composite oil phase material for improving water resistance and explosion performance of a porous granular ammonium nitrate fuel oil explosive. The composite oil phase material comprises the following raw materials in parts by mass: 80-100 parts of naphthenic oil, 2-7 parts of an amino-containing dispersant, 1-5 parts of a nanoscale molecular sieve and 0.3-3 parts of an oleate derivative stabilizer. The composite oil phase material can effectively improve the explosion performance and the water resistance of the on-site mixed porous granular ammonium nitrate fuel oil explosive. The raw materials are environment-friendly and easy to obtain, and high popularization value is achieved. The composite oil-phase material provided by the invention is high in flash point and low in condensation point, can replace diesel oil with the grade of minus 40 DEG C to minus 20 DEG C to be applied to preparation of a porous granular ammonium nitrate fuel oil explosive mixed and loaded on site in winter, the intrinsic safety of the explosive production process is improved, and the explosive preparation cost is reduced. The composite oil phase material provided by the invention can also provide good weak alkaline water resistance for the porous granular ammonium nitrate fuel oil explosive.

Description

Technical Field

[0001] The present invention belongs to the field of porous granular ammonium nitrate fuel oil explosive, and particularly relates to a composite oil phase material for improving the water resistance and explosion performance of porous granular ammonium nitrate fuel oil explosive. Background Art

[0002] On-site mixed loading porous granular ammonium nitrate fuel oil explosive is one of the main industrial explosives in China. Due to its convenient preparation, high safety and low price, its output has been increasing in recent years, and its status in industrial explosives has become increasingly important. This type of explosive is usually prepared by mixing porous granular ammonium nitrate and an oil phase material. The currently used oil phase material is generally light diesel oil, which has a high price, a low flash point and poor safety. After mixing, the contact between diesel oil and porous granular ammonium nitrate in the formed explosive is not tight, and the oil phase fails to effectively coat the ammonium nitrate particles. Therefore, the explosion performance of this type of explosive is low and the water resistance is poor, making it difficult to be applied to the water-containing blasting operation environment.

[0003] In recent years, in order to improve the performance of on-site mixed loading porous granular ammonium nitrate fuel oil explosive and solve the problems of high price and low safety of the used oil phase material, some technical methods have been proposed in relevant patents. For example, the technical method of using waste tobacco oil in life to replace diesel oil as the oil phase material was proposed in Patent No. 201310130151.4; the technical method of using biodiesel to replace or partially replace diesel oil as the oil phase material was proposed in Patent No. 201110251807.9; the technical method of using hydrogenated heavy oil and calorific value improver and other combinations to form the oil phase material for on-site mixed loading porous granular ammonium nitrate fuel oil explosive was disclosed in Patent No. 201710675868.5.

[0004] However, although the currently proposed technical methods for replacing diesel oil have reduced the cost of the oil phase material for on-site mixed loading porous granular ammonium nitrate fuel oil explosive to a certain extent, the problems of poor detonation performance and water resistance of the formed explosive have not been solved. At the same time, in winter, due to the high freezing point of the oil phase material, it is still necessary to use national standard diesel oil at -40°C to -20°C to prepare on-site mixed loading porous granular ammonium nitrate fuel oil explosive, resulting in a still high raw material cost for explosive production.

[0005] CN116621666 A reported a porous granular modified ammonium nitrate fuel oil explosive for underground mines, which includes the following components: 88.2 - 88.25 parts of crushed ammonium nitrate, 4.9 - 5.1 parts of wood powder, 0.3 - 0.5 parts of modifier, 6.35 - 6.4 parts of composite oil phase, and 29 - 31 parts of uncrushed porous granular ammonium nitrate; the modifier includes the following components according to the following weight ratio: 60 - 65 parts of octadecylamine phosphate, 10 - 15 parts of zinc stearate, and 20 - 30 parts of activated diatomaceous earth; the composite oil phase includes 62 - 67 parts of naphthenic oil, 22 - 27 parts of straight-chain hydrocarbon oil, and 9 - 11 parts of emulsifier s-80. This patent also fails to overcome the defect of poor water resistance of the porous granular modified ammonium nitrate fuel oil explosive.

[0006] The prior art has conducted in-depth research on the poor water resistance of the porous granular modified ammonium nitrate fuel oil explosive. CN1137507A uses a latex cured at a temperature below 60 - 70 °C as an outer water-resistant layer, and the latex is made of ammonium nitrate, sodium nitrate, sodium dodecyl sulfate, water, emulsifier, paraffin wax, ceresin wax, cross-linking agent, and sensitizer. The explosive composition of CN100334043C forms a water-resistant coating film with a thermosetting resin, and these components are coated with the resin film. CN105111033A forms a water-resistant coating film with a thermosetting resin, and the oxidizer and combustible agent are respectively coated in the water-resistant coating film.

[0007] CN104045495A discloses a viscous granular ammonium nitrate fuel oil explosive. This patent prepares colloidal polyacrylamide to avoid direct contact between water and explosive components. In the mixing method, ammonium nitrate is first coated with water-resistant emulsified explosive waste or emulsified explosive matrix, and then water-containing colloidal polyacrylamide is added to isolate the explosive components from the water-containing colloidal polyacrylamide, thus eliminating the dissolution and damage of ammonium nitrate by water.

[0008] CN112209787A discloses a water-resistant porous granular ammonium nitrate fuel oil explosive. 0.5 - 2 parts of cross-linking agent are added to 93 - 95 parts of porous granular ammonium nitrate and mixed, and then 0.35 - 2 parts of surfactant are mixed with the components containing the cross-linking agent and porous granular ammonium nitrate. This patent does not need to coat the porous ammonium nitrate with a heat-insulated latex matrix to achieve the water resistance of the explosive. Only at normal temperature, the porous granular ammonium nitrate particles are dispersed in a gel body with a three-dimensional network macromolecular structure, which can ensure the water resistance of the porous granular ammonium nitrate, and the water resistance performance is good.

[0009] Based on the above analysis, there is currently no effective oil phase material to improve the explosion performance and water resistance of on-site mixed porous granular ammonium nitrate fuel oil explosive, enhance the blasting effect of this type of explosive under water-containing conditions, and reduce the use cost of the oil phase material in cold winter seasons. Therefore, we invented a composite oil phase material that can improve the water resistance and explosion performance of on-site mixed porous granular ammonium nitrate fuel oil explosive to solve the above technical problems.

[0010] For the above technical method for solving water resistance, the major defect of existence: technology is all more complicated, porous granular ammonium oil explosive, is formed by stirring and mixing at normal temperature by porous granular ammonium nitrate and diesel oil, if by latex matrix and mix with it, need first prepare latex matrix by emulsification, more troublesome.As by adding colloidal polyacrylamide, need first configure colloidal polyacrylamide aqueous solution, then mix with porous granular ammonium nitrate, diesel oil, and existing explosive production process does not fully match, colloidal polyacrylamide viscosity should be larger, be difficult to mix with porous granular ammonium nitrate.In addition, porous granular ammonium nitrate particles are dispersed in the gel of body type net macromolecular structure, may be difficult for uniform dispersion under existing technology, if there are these problems, be difficult to realize further optimization explosion performance while water resistance improves, affect the dispersibility of this type explosive simultaneously, make there is unfavorable factor in its blasting construction. In addition, although some research has been conducted on the water resistance of field-mixed porous granular ammonium oil explosives, they are all based on neutral water with a pH of ≈ 7. For some areas where groundwater is alkaline, or water with a high mineralization degree, weak alkaline water with a pH of ≈ 8 is used, since ammonium nitrate is acidic, the water resistance of porous granular ammonium oil explosives will decrease in weak alkaline water. After being soaked in weak alkaline water, the explosive performance of porous granular ammonium oil explosives is more likely to be adversely affected. Summary of the invention

[0011] In order to solve the problems existing in the prior art, the present invention proposes a composite oil phase material that can improve the water resistance and blast performance of on-site mixed porous granular ammonium nitrate oil-fuel mixture, the method can effectively solve the above-mentioned technical problems, while reducing material cost, improve the detonation performance, the water resistance of prepared on-site mixed porous granular ammonium nitrate oil-fuel mixture, and can be applied to the preparation and blasting operation of on-site mixed porous granular ammonium nitrate oil-fuel mixture in winter. Composite oil phase material of the present invention also provides the performance of good weakly alkaline water resistance for porous granular ammonium nitrate oil-fuel mixture. For achieving the above object, the present invention adopts the following technical solutions:

[0012] A composite oil phase material for improving the water resistance and explosion performance of porous granular ammonium oil-fuel explosive comprises the following raw materials in parts by mass: 80-100 parts of cycloalkyl oil, 2-7 parts of amino-containing dispersant, 1-5 parts of nano-scale molecular sieve, and 0.3-3 parts of oleate derivative stabilizer.

[0013] Furthermore, the naphthenic oleic acid value is 0.03 mgKOH / g to 0.05 mgKOH·g -1 ; Viscosity: 8-10mm 2 ·s -1 .

[0014] Furthermore, the amino-containing dispersant is selected from any one of oleylamide, oleylamine and laurylamide.

[0015] The nanomolecules are selected from any one of UIO-66, Zif-71, ZSM-5, and MCM-22, and the particle size of the nano-molecular sieve is 50-200 nm;

[0016] Further, the oleate derivative stabilizer is selected from any one of diglycerol dioleate and triglycerol dioleate.

[0017] Further, the composite oil phase material comprises the following raw materials in parts by mass: 80-100 parts of naphthenic oil, 3-5 parts of amino-containing dispersant, 2-4 parts of nanomaterial, and 1-2 parts of oleate derivative stabilizer.

[0018] Further, the composite oil phase material further comprises the following raw materials in parts by mass: 4-7 parts of functional copolymer, and the monomers of the functional copolymer include (meth)acrylic acid C4-C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group; preferably, the functional copolymer is prepared by copolymerizing (meth)acrylic acid C4-C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group. Further, the molar ratio of (meth)acrylic acid C4-C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group is 6-10:1-2:2-3.

[0019] Further, the (meth)acrylic acid C4-C10 alkyl ester is selected from at least one of butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and isooctyl (meth)acrylate; the acrylate derivative containing epoxy group is selected from at least one of 3,4-epoxycyclohexylmethyl (meth)acrylate and glycidyl (meth)acrylate.

[0020] The functional polymer is prepared by a method comprising the following steps: under an inert atmosphere, (meth)acrylic acid C4-C10 alkyl ester, (meth)acrylic acid isobornyl ester, acrylate derivative containing epoxy group, and a solvent are mixed evenly, an initiator is added, the temperature is raised to initiate a polymerization reaction, and after cooling, the solvent is evaporated to obtain a copolymer.

[0021] Further, the inert atmosphere is nitrogen and / or argon, the solvent is selected from at least one of ethyl acetate and butyl acetate, the initiator is selected from peroxide initiators and azo initiators, such as AIBN; the addition amount of the initiator is 0.2-1 wt% of the total mass of the monomers. The temperature raising temperature is the initiation temperature of the initiator, for example, for AIBN, the temperature raising temperature is 70-80 °C.

[0022] The present invention also provides the use of the above functional polymer as an additive for a composite oil phase material for improving the water resistance and explosion performance of porous granular ammonium nitrate fuel oil explosive.

[0023] The on-site mixed loading porous granular ammonium nitrate fuel oil explosive is an industrial explosive formed by physically mixing porous granular ammonium nitrate and diesel oil. For this type of explosive, the factors restricting its application effect mainly include: explosive performance and water resistance. Among them, whether it has excellent explosive performance is closely related to whether the porous granular ammonium nitrate and the oil phase can be in close contact; whether it has excellent water resistance is directly related to whether the oil phase completely coats the porous granular ammonium nitrate. Since porous granular ammonium nitrate will absorb moisture and is easily soluble in water, if the coating effect of the oil phase is relatively poor, the explosive will fail due to the absorption of moisture and dissolution of the porous granular ammonium nitrate. The technical innovation point in the present invention is to optimize an oil phase material formula to simultaneously improve the explosive performance and water resistance of the on-site mixed loading porous granular ammonium nitrate fuel oil explosive. The oil phase material of the present invention is tightly combined on the surface of the porous granular ammonium nitrate, improving the degree of tight combination of the porous granular ammonium nitrate and the oil phase material and enhancing its explosive performance.

[0024] When using diesel oil or other oil products alone, since they are immiscible with ammonium nitrate, it is difficult to form a stable oil film on the surface of the porous granular ammonium nitrate, resulting in poor contact and coating effect. The present invention uses the method of nano powder + dispersant + stabilizer to construct a composite oil phase formula suitable for porous granular ammonium nitrate explosives. Among them, the dispersant has an amphoteric structure (one end is hydrophilic and the other end is lipophilic), and its functional characteristic is to improve the contact degree between the porous granular ammonium nitrate and the composite oil phase material, enabling the naphthenic oil to be in close contact with the porous granular ammonium nitrate. The three dispersants of oleamide, oleylamine, and lauroylamide used in the present invention have a moderate length of the hydrophobic chain, and the hydrophilic groups (primary amine, amide) have good interaction with ammonium nitrate, so they can promote the dispersion of the oil on the surface of the ammonium nitrate particles. Although the amount of nano powder added is small, it can further adsorb itself and the oil phase material on the surface of the porous granular ammonium nitrate through the van der Waals force, electrostatic force, etc. between itself and the surface of the porous granular ammonium nitrate, thereby further improving the contact degree between the porous granular ammonium nitrate and the oil phase material and the contact stability (the oil migration amount is relatively small with the storage time, and the exposed surface of the porous granular ammonium nitrate is less). In addition, since it is difficult to achieve a high degree of dispersion of nano powder in oil and maintain long-term uniform dispersion, a stabilizer is added to the formula to make the nano powder disperse evenly in oil and not agglomerate. The diglycerol dioleate and triglycerol dioleate used in the patent have a strong interaction with the nano powder and have a good effect on stabilizing the uniform dispersion of the nano powder in oil. The inventor also found that adding a small amount of functional copolymer can further improve the performance of the explosive against weakly alkaline water.

[0025] The present invention also provides an on-site mixed loading porous granular ammonium nitrate fuel oil explosive, which includes the following components: the composite oil phase material and porous ammonium nitrate.

[0026] Furthermore, the mass ratio of the porous ammonium nitrate to the composite oil phase material is 100:4-7, preferably 100:5-6.

[0027] The composite oil phase material of the present invention can effectively improve the explosion performance and water resistance of the on-site mixed porous granular ammonium nitrate explosive. The raw materials are environmentally friendly and easily available, and have high popularization value. The composite oil phase material provided by the present invention has a high flash point and a low freezing point, can replace diesel oil with a grade of -40°C to -20°C and be applied to the preparation of on-site mixed porous granular ammonium nitrate explosive in winter, improves the inherent safety of the explosive production process, and reduces the cost of explosive preparation. The oil phase material provided by the present invention and ammonium nitrate are mixed to form a porous granular ammonium nitrate explosive, which has good resistance to weakly alkaline water. When immersed in weakly alkaline water with pH = 8, the explosion performance is basically not lost. The application range of such explosives is broadened. In some areas of operation, wells need to be drilled, and the groundwater is often water with a certain alkalinity and a certain salinity. The mixed porous granular ammonium nitrate explosive made of the composite oil phase material of the present invention can still play a stable role under such weakly alkaline water conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 is the mixing effect diagram of the mixed ammonium nitrate explosive formed after the composite oil phase and porous granular ammonium nitrate in Example 1 are mixed. DETAILED DESCRIPTION OF THE INVENTION

[0029] The present invention will be further described below through examples, but the present invention is not limited to the described examples.

[0030] Preparation Example 1

[0031] The acrylic acid isooctyl ester, isobornyl methacrylate, and glycidyl methacrylate are fed in a molar ratio of 8:2:3 to obtain a mixed monomer. The mixed monomer is added to the solvent butyl acetate, nitrogen is passed to remove air, 0.5 wt% of AIBN based on the total mass of the monomers is added as an initiator, and the temperature is raised to 75°C and reacted under stirring for 8 h. After cooling to room temperature, the solvent is removed by rotary evaporation to obtain a functional polymer.

[0032] Preparation Example 2

[0033] Other conditions are the same as those in Preparation Example 1, except that the monomers are a mixed monomer of butyl methacrylate, isobornyl methacrylate, and 3,4-epoxycyclohexylmethyl methacrylate in a molar ratio of 10:1:2.

[0034] Preparation Example 3

[0035] Other conditions are the same as those in Preparation Example 1, except that the monomers are a mixed monomer of 2-ethylhexyl methacrylate, isobornyl methacrylate, and glycidyl methacrylate in a molar ratio of 10:1:3.

[0036] Preparation Example 4

[0037] Other conditions were the same as those in Preparation Example 1, except that isooctyl acrylate in the mixed monomers was replaced with an equimolar amount of ethyl methacrylate.

[0038] Preparation Example 5

[0039] Other conditions were the same as those in Preparation Example 1, except that isobornyl methacrylate was not added to the mixed monomers.

[0040] Preparation Example 6

[0041] Other conditions were the same as those in Preparation Example 1, except that glycidyl methacrylate was not added to the mixed monomers.

[0042] Example 1

[0043] 0.3 kg of oleamide was added to 10 kg of naphthenic oil with an acid value of 0.03 mg KOH·g -1 , a viscosity of 8 mm 2 ·s -1 . Stirring was started and the mixture was heated to 50 °C, then 0.2 kg of UIO-66 with an average size of 50 nm was added. After stirring evenly, 0.1 kg of diglycerol dioleate was added, and stirring was continued for 3 h to obtain a composite oil-phase material.

[0044] Example 2

[0045] 0.5 kg of oleamide was added to 10 kg of naphthenic oil with an acid value of 0.05 mg KOH·g -1 , a viscosity of 10 mm 2 ·s -1 . Stirring was started and the mixture was heated to 50 °C, then 0.4 kg of Zif-71 with an average size of 100 nm was added. After stirring evenly, 0.3 kg of diglycerol dioleate was added, and stirring was continued for 3 h to obtain a composite oil-phase material.

[0046] Example 3

[0047] 0.6 kg of oleylamine was added to 8 kg of naphthenic oil with an acid value of 0.04 mg KOH·g -1 , a viscosity of 9 mm 2 ·s -1 . Stirring was started and the mixture was heated to 50 °C, then 0.1 kg of ZSM-5 with an average size of 70 nm was added. After stirring evenly, 0.05 kg of diglycerol dioleate was added, and stirring was continued for 3 h to obtain a composite oil-phase material.

[0048] Example 4

[0049] 0.2 kg of laurylamide was added to 10 kg of naphthenic oil with an acid value of 0.05 mg KOH·g -1 , a viscosity of 10 mm2 ·s -1 The cycloalkyl oil was stirred and heated to 50°C, and then 0.5 kg of UIO-66 with an average size of 200 nm was added. After stirring evenly, 0.1 kg of diglycerol oleate was added and stirring was continued for 3 hours to obtain a composite oil phase material.

[0050] Example 5

[0051] 0.3 kg of oleamide and 0.4 kg of the functional polymer prepared in Example 1 were added to 10 kg of ethanol with an acid value of 0.03 mg KOH·g -1 , viscosity is 8mm 2 ·s -1 The cycloalkyl oil was stirred and heated to 50°C, and then 0.2 kg of UIO-66 with an average size of 100 nm was added, and after stirring evenly, 0.1 kg of triglycerol dioleate was added, and stirring was continued for 3 hours to obtain a composite oil phase material. That is, the other components of Example 5 are the same as those of Example 1, and a functional polymer is also added.

[0052] Example 6

[0053] The other conditions are the same as those in Example 5, except that 0.4 kg of the functional polymer obtained in Preparation Example 1 is replaced by 0.7 kg of the functional polymer obtained in Preparation Example 2.

[0054] Example 7

[0055] The other conditions are the same as those in Example 5, except that 0.4 kg of the functional polymer obtained in Preparation Example 1 is replaced by an equal mass of the functional polymer obtained in Preparation Example 3.

[0056] Example 8

[0057] The other conditions are the same as those in Example 5, except that 0.4 kg of the functional polymer obtained in Preparation Example 1 is replaced by an equal mass of the functional polymer obtained in Preparation Example 4.

[0058] Example 9

[0059] The other conditions are the same as those in Example 5, except that 0.4 kg of the functional polymer obtained in Preparation Example 1 is replaced by an equal mass of the functional polymer obtained in Preparation Example 5.

[0060] Example 10

[0061] The other conditions are the same as those in Example 5, except that 0.4 kg of the functional polymer obtained in Preparation Example 1 is replaced by an equal mass of the functional polymer obtained in Preparation Example 6.

[0062] Comparative Example 1

[0063] The other conditions were the same as those in Example 1, except that oleylamide was replaced with an equal mass of Span 80.

[0064] Comparative Example 2

[0065] Other conditions were the same as in Example 1, except that oleamide was replaced with an equal mass of stearyl monoethanolamide.

[0066] Comparative Example 3

[0067] Other conditions were the same as in Example 1, except that diglycerol dioleate was replaced with an equal mass of polyisobutylene succinimide.

[0068] Comparative Example 4

[0069] Other conditions were the same as in Example 1, except that diglycerol dioleate was replaced with an equal mass of polyethylene wax.

[0070] Application Example

[0071] The composite oil phase materials of the above Examples and Comparative Examples were mixed with porous granular ammonium nitrate to form on-site mixed loading porous granular ANFO. By examining the detonation velocity of the formed explosive and testing the detonation velocity of the explosive after soaking in sodium bicarbonate water with pH = 8 for 4 h and drying. The change in the conductivity of the aqueous solution after soaking 20 g of on-site mixed loading porous granular ANFO in 100 g of deionized water for a certain period of time (12 h, 24 h) was also tested to evaluate the effect of the composite oil phase material on the explosion performance and water resistance of on-site mixed loading porous granular ANFO. The formula of on-site mixed loading porous granular ANFO is shown in Table 1, the explosive performance results are shown in Table 2, and the water resistance is shown in Table 3.

[0072] Figure 1 It is the mixing effect diagram of the mixed loading ANFO formed by mixing the composite oil phase of Example 1 and porous granular ammonium nitrate. Sudan red was used as a coloring agent and added to the composite oil phase material to judge the mixing effect between the composite oil phase material and porous granular ammonium nitrate (the addition amount of Sudan red was 0.02% of the weight of the composite oil phase). By observing the apparent state, it can be seen that there is no oil spill on the particle surface and the fuel oil is fully absorbed, indicating that the mixing effect between the composite oil phase material and porous granular ammonium nitrate is good.

[0073] Table 1: Formula of on-site mixed loading porous granular ANFO

[0074]

[0075] Table 2: Explosion performance of on-site mixed loading porous granular ANFO

[0076]

[0077] Table 3: Water resistance of on-site mixed loading porous granular ANFO

[0078]

[0079] From the test results in Table 2, it can be seen that when the composite oil phase material of the present invention is mixed with porous granular ammonium nitrate to prepare on-site mixed porous granular ammonium nitrate explosive, the formed explosive has a relatively high detonation velocity. When immersed in weakly alkaline water, the detonation velocity is basically not affected. Especially after adding the functional polymer, the ability to resist weakly alkaline water is stronger. From the data in Table 3, it can be seen that after soaking in water, the change in the conductivity of water is relatively low. Based on the above data, it shows that the composite oil phase material provided by the present invention has the ability to improve the explosion performance and water resistance of on-site mixed porous granular ammonium nitrate explosive at the same time, especially the ability to resist weakly alkaline water.

Claims

1. A composite oil-phase material for improving the water resistance and explosive performance of porous granular ammonium nitrate fuel oil explosive, characterized in that, It includes raw materials in the following parts by mass: 80 - 100 parts of naphthenic oil, 2 - 7 parts of amino-containing dispersant, 1 - 5 parts of nano-sized molecular sieve, and 0.3 - 3 parts of oleate derivative stabilizer.

2. The composite oil phase material according to claim 1, wherein The naphthenic acid value is 0.03 mgKOH / g to 0.05 mgKOH·g -1 ; the viscosity is 8 to 10 mm 2 ·s -1 .

3. The composite oil phase material according to claim 1, wherein The amino-containing dispersant is selected from any one of oleamide, oleylamine, and lauramide.

4. The composite oil phase material according to claim 1, characterized in that The nano-molecular sieve is selected from any one of UIO-66, Zif-71, ZSM-5, and MCM-22, and the particle size of the nano-molecular sieve is 50 - 200 nm.

5. The composite oil phase material according to claim 1, wherein The oleate derivative stabilizer is selected from any one of triglycerol dioleate and diglycerol dioleate.

6. The composite oil phase material according to claim 1, characterized in that, The composite oil phase material includes raw materials in the following parts by mass: 80 - 100 parts of naphthenic oil, 3 - 5 parts of amino-containing dispersant, 2 - 4 parts of nano-material, and 1 - 2 parts of oleate derivative stabilizer.

7. The composite oil phase material according to claim 1, wherein The composite oil phase material further includes raw materials in the following parts by mass: 4 - 7 parts of functional copolymer, and the monomers of the functional copolymer include (meth)acrylic acid C4 - C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group; preferably, the functional copolymer is prepared by copolymerizing (meth)acrylic acid C4 - C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group. Preferably, the molar ratio of (meth)acrylic acid C4 - C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group is 6 - 10:1 - 2:2 - 3.

8. The composite oil phase material according to claim 7, wherein The (meth)acrylic acid C4 - C10 alkyl ester is selected from at least one of butyl (meth)acrylate, pentyl (meth)acrylate, hexyl (meth)acrylate, 2-ethylhexyl (meth)acrylate, and isooctyl (meth)acrylate; the acrylate derivative containing epoxy group is selected from at least one of 3,4-epoxycyclohexylmethyl (meth)acrylate and glycidyl (meth)acrylate.

9. Use of a functional polymer as an additive for a composite oil phase material for improving the water resistance and explosive performance of porous granular ammonium nitrate fuel oil, characterized in that, The monomers of the functional copolymer include (meth)acrylic acid C4 - C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group; preferably, the molar ratio of (meth)acrylic acid C4 - C10 alkyl ester, (meth)acrylic acid isobornyl ester, and acrylate derivative containing epoxy group is 6 - 10:1 - 2:2 - 3.

10. A bulk-loaded porous granular ANFO, comprising the following components: the composite oil phase material according to any one of claims 1 - 9, and porous ammonium nitrate. Furthermore, the mass ratio of porous ammonium nitrate to the composite oil phase material is 100:4 - 7, preferably 100:5 - 6.

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