Mining anchoring agent and preparation method thereof

Abstract

The invention relates to the technical field of anchoring agents, and provides a mining anchoring agent and a preparation method thereof. The mining anchoring agent comprises a curing agent and resin mortar, the resin mortar comprises the following raw materials in parts by weight: 100 parts of resin, 420-520 parts of stone powder, 1-2 parts of silicon dioxide, 1-1.5 parts of a dispersing agent, 3-6 parts of a high-temperature-resistant agent and 1-5 parts of a coupling agent. The high-temperature-resistant agent comprises the following components in parts by weight: 2-10 parts of aluminum distearate and 2-10 parts of metal carbide. According to the technical scheme, the problem of insufficient thermal stability of the mining anchoring agent in the prior art is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of anchoring agents, and in particular to an anchoring agent for mining and a preparation method thereof. Background Art

[0002] In engineering fields such as mining and underground tunnel support, mining anchors serve as key materials connecting anchor rods to surrounding rock. By tightly bonding the anchor rods to the surrounding rock, they effectively improve the stability and bearing capacity of the surrounding rock, playing a vital role in ensuring safe mine production. Currently, the mining anchors widely used on the market mainly include cement-based anchors and resin-based anchors. Resin-based anchors are a common choice for mine support due to their rapid curing and high early strength. However, in deep mining, ground temperatures continue to rise with increasing depth, and the ambient temperature underground can reach 50°C or even higher. Furthermore, in some mines with the risk of spontaneous combustion, localized temperatures can also rise significantly. Resin-based anchors, due to softening and degradation of the resin matrix, can lead to a sharp drop in strength, severely reducing the reliability of the anchoring system.

[0003] Therefore, it is necessary to obtain a mining anchoring agent with excellent thermal stability to improve the stability of the anchoring system in a high temperature environment. Summary of the Invention

[0004] The present invention provides a mining anchoring agent and a preparation method thereof, which solves the problem of insufficient thermal stability of the mining anchoring agent in the related art.

[0005] The technical solutions of the present invention are as follows: The present invention provides a mining anchoring agent, comprising a curing agent and resin cement; The resin mortar comprises the following raw materials in parts by weight: 100 parts of resin, 420-520 parts of stone powder, 1-2 parts of silicon dioxide, 1-1.5 parts of dispersant, 3-6 parts of high temperature resistant agent, and 1-5 parts of coupling agent; The high temperature resistant agent comprises the following components in parts by weight: 2 to 10 parts of aluminum distearate and 2 to 10 parts of metal carbide.

[0006] As a further technical solution, the resin includes one of epoxy resin and unsaturated polyester resin; The metal carbide includes one or both of tungsten carbide and titanium carbide; The dispersant includes silicone oil or polyacrylate.

[0007] As a further technical solution, the mass ratio of the curing agent to the resin putty is 5~8:100.

[0008] As a further technical solution, the curing agent includes a peroxide curing agent and / or an acid anhydride curing agent.

[0009] As a further technical solution, the metal carbide is a metal carbide surface-treated with o-aminobenzoic acid.

[0010] As a further technical solution, the preparation method of the metal carbide surface-treated with anthranilic acid comprises the following steps: The metal carbide, o-aminobenzoic acid and a solvent are ultrasonically mixed, and the solvent is removed by drying to obtain the metal carbide surface-treated with o-aminobenzoic acid.

[0011] In the present invention, the metal carbide surface-treated with anthranilic acid is used to further improve the thermal stability and compressive strength of the mining anchoring agent.

[0012] As a further technical solution, the frequency of the ultrasonic mixing is 50-60 kHz, and the time is 40-60 min.

[0013] As a further technical solution, the mass ratio of the metal carbide, anthranilic acid and solvent is 1:0.5:10~20.

[0014] As a further technical solution, the mass ratio of the aluminum distearate to the metal carbide is ≤1.

[0015] In the present invention, aluminum distearate and metal carbide are used as high-temperature resistant agents for resin cement, and the mass ratio of aluminum distearate and metal carbide is adjusted to be ≤1, thereby further improving the thermal stability of the mining anchoring agent.

[0016] The present invention also provides a method for preparing a mining anchoring agent, which is used to prepare the mining anchoring agent, comprising the following steps: S1. Mixing resin, silica, dispersant, high temperature resistant agent and coupling agent, adding stone powder and continuing to mix to obtain resin cement; S2. The resin cement and curing agent are respectively loaded into different layers of a double-layer film bag, and both ends of the double-layer film bag are sealed to obtain the mining anchoring agent.

[0017] The present invention also proposes the use of the mining anchoring agent or the mining anchoring agent prepared by the preparation method in mining.

[0018] The working principle and beneficial effects of the present invention are: In the present invention, aluminum distearate and metal carbide are used as high-temperature resistant agents for resin cement, which significantly improves the high-temperature resistance of the mining anchor. In the resin cement, aluminum distearate acts as a dispersant to evenly distribute the components, ensuring the stability of the system. On the other hand, it forms a protective film on the surface, effectively blocking heat invasion and slowing down the degradation and aging of internal components. Metal carbide provides a high-temperature resistant skeleton, providing strong support for the resin cement at high temperatures, enhancing its overall structural strength and making it less prone to deformation. The synergy between aluminum distearate and metal carbide enables the anchor to remain stable for a long time at higher temperatures, and will not fail quickly or significantly reduce performance due to high temperatures. DETAILED DESCRIPTION

[0019] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0020] In the following examples and comparative examples, the model of the unsaturated polyester resin is DC191.

[0021] Example 1 Mining anchoring agent, comprising a curing agent and resin mastic in a mass ratio of 5:100; The resin cement comprises the following raw materials in parts by weight: 100 parts of unsaturated polyester resin, 420 parts of stone powder, 1 part of silicon dioxide, 1 part of silicone oil, 3 parts of high temperature resistant agent, and 1 part of silane coupling agent KH550; The high temperature resistant agent includes the following components in parts by weight: 2 parts of aluminum distearate and 2 parts of titanium carbide; The preparation method of the mining anchoring agent comprises the following steps: S1. Mix unsaturated polyester resin, silicon dioxide, silicone oil, high temperature resistant agent, and silane coupling agent KH550, add stone powder and continue mixing to obtain resin cement; S2. The resin cement and curing agent are respectively loaded into different layers of a double-layer film bag, and both ends of the double-layer film bag are sealed to obtain a mining anchoring agent.

[0022] Example 2 The difference between this embodiment and embodiment 1 is that the mining anchoring agent includes a curing agent and a resin cement in a mass ratio of 8:100; The resin cement comprises the following raw materials in parts by weight: 100 parts of unsaturated polyester resin, 520 parts of stone powder, 2 parts of silicon dioxide, 1.5 parts of silicone oil, 6 parts of high temperature resistant agent, and 5 parts of silane coupling agent KH550; The high temperature resistant agent includes the following components in parts by weight: 10 parts of aluminum distearate and 10 parts of titanium carbide; The preparation method of the mining anchoring agent comprises the following steps: S1. Mix unsaturated polyester resin, silicon dioxide, silicone oil, high temperature resistant agent, and silane coupling agent KH550, add stone powder and continue mixing to obtain resin cement; S2. The resin cement and curing agent are respectively loaded into different layers of a double-layer film bag, and both ends of the double-layer film bag are sealed to obtain a mining anchoring agent.

[0023] Example 3 The difference between this embodiment and embodiment 1 is that the mining anchoring agent includes a curing agent and a resin cement in a mass ratio of 6:100; The resin cement comprises the following raw materials in parts by weight: 100 parts of unsaturated polyester resin, 480 parts of stone powder, 2 parts of silicon dioxide, 1.5 parts of silicone oil, 5 parts of high temperature resistant agent, and 3 parts of silane coupling agent KH550; The high temperature resistant agent includes the following components in parts by weight: 6 parts of aluminum distearate and 4 parts of titanium carbide; The preparation method of the mining anchoring agent comprises the following steps: S1. Mix unsaturated polyester resin, silicon dioxide, silicone oil, high temperature resistant agent, and silane coupling agent KH550, add stone powder and continue mixing to obtain resin cement; S2. The resin cement and curing agent are respectively loaded into different layers of a double-layer film bag, and both ends of the double-layer film bag are sealed to obtain a mining anchoring agent.

[0024] Example 4 The only difference between this embodiment and embodiment 3 is that the high temperature resistant agent includes the following components in parts by weight: 6 parts of aluminum distearate, 4 parts of titanium carbide, and 2 parts of anthranilic acid.

[0025] Example 5 The only difference between this embodiment and embodiment 3 is that the high temperature resistant agent comprises the following components in parts by weight: 6 parts of aluminum distearate and 4 parts of titanium carbide surface treated with anthranilic acid; The preparation method of titanium carbide surface treated with anthranilic acid comprises the following steps: Titanium carbide, anthranilic acid and ethanol are ultrasonically mixed at a frequency of 50 kHz for 60 minutes, and the ethanol is dried to remove the ethanol to obtain titanium carbide surface-treated with anthranilic acid; wherein the mass ratio of titanium carbide, anthranilic acid and ethanol is 1:0.5:10.

[0026] Example 6 The only difference between this embodiment and embodiment 3 is that the high temperature resistant agent comprises the following components in parts by weight: 6 parts of aluminum distearate and 4 parts of titanium carbide surface treated with anthranilic acid; The preparation method of titanium carbide surface treated with anthranilic acid comprises the following steps: Titanium carbide, anthranilic acid and ethanol are ultrasonically mixed at a frequency of 60 kHz for 40 minutes, and the ethanol is dried to remove the ethanol to obtain titanium carbide surface-treated with anthranilic acid; wherein the mass ratio of titanium carbide, anthranilic acid and ethanol is 1:0.5:20.

[0027] Example 7 The only difference between this embodiment and embodiment 6 is that the high temperature resistant agent includes the following components in parts by weight: 5 parts of aluminum distearate and 5 parts of titanium carbide surface-treated with anthranilic acid.

[0028] Example 8 The only difference between this embodiment and embodiment 6 is that the high temperature resistant agent includes the following components in parts by weight: 4 parts of aluminum distearate and 6 parts of titanium carbide surface-treated with anthranilic acid.

[0029] Comparative Example 1 The only difference between this comparative example and Example 3 is that the resin cement includes the following raw materials in parts by weight: 100 parts of unsaturated polyester resin, 480 parts of stone powder, 2 parts of silicon dioxide, 1.5 parts of silicone oil, 5 parts of aluminum distearate, and 3 parts of silane coupling agent KH550.

[0030] Comparative Example 2 The only difference between this comparative example and Example 3 is that the resin cement includes the following raw materials in parts by weight: 100 parts of unsaturated polyester resin, 480 parts of stone powder, 2 parts of silicon dioxide, 1.5 parts of silicone oil, 5 parts of titanium carbide, and 3 parts of silane coupling agent KH550.

[0031] Experimental example According to MT146.1 "Resin Anchor Bolt Anchoring Agent", the compressive strength, pull-out strength, anchoring force and thermal stability of the mining anchoring agents prepared in Examples 1 to 8 and Comparative Examples 1 to 2 were tested, and the results are shown in Table 1.

[0032] Table 1 Performance test results

[0033] Compared with comparative examples 1 to 2, the mining anchoring agents prepared in Examples 1 to 8 are superior in compressive strength, pull-out strength, anchoring force, and thermal stability. The mining anchoring agents prepared in Examples 1 to 8 of the present invention have excellent performance.

[0034] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A mining anchoring agent, characterized in that: Including curing agent and resin putty; The resin mortar comprises the following raw materials in parts by weight: 100 parts of resin, 420-520 parts of stone powder, 1-2 parts of silicon dioxide, 1-1.5 parts of dispersant, 3-6 parts of high temperature resistant agent, and 1-5 parts of coupling agent; The high temperature resistant agent comprises the following components in parts by weight: 2 to 10 parts of aluminum distearate and 2 to 10 parts of metal carbide.

2. A mining anchoring agent according to claim 1, characterized in that: The resin includes one of epoxy resin and unsaturated polyester resin; The metal carbide includes one or both of tungsten carbide and titanium carbide; The dispersant includes silicone oil or polyacrylate.

3. A mining anchoring agent according to claim 1, characterized in that: The mass ratio of the curing agent to the resin cement is 5-8:

100.

4. A mining anchoring agent according to claim 1, characterized in that: The curing agent includes a peroxide curing agent and / or an acid anhydride curing agent.

5. A mining anchoring agent according to claim 1, characterized in that: The metal carbide is a metal carbide surface-treated with o-aminobenzoic acid.

6. A mining anchoring agent according to claim 1, characterized in that: The preparation method of the metal carbide surface treated with anthranilic acid comprises the following steps: The metal carbide, o-aminobenzoic acid and a solvent are ultrasonically mixed, and the solvent is removed by drying to obtain the metal carbide surface-treated with o-aminobenzoic acid.

7. A mining anchoring agent according to claim 6, characterized in that: The frequency of the ultrasonic mixing is 50-60 kHz, and the time is 40-60 min.

8. A mining anchoring agent according to claim 6, characterized in that: The mass ratio of the metal carbide, anthranilic acid and solvent is 1:0.5:10-20.

9. A method for preparing a mining anchoring agent, for preparing a mining anchoring agent according to any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Mixing resin, silica, dispersant, high temperature resistant agent and coupling agent, adding stone powder and continuing to mix to obtain resin cement; S2. The resin cement and curing agent are respectively loaded into different layers of a double-layer film bag, and both ends of the double-layer film bag are sealed to obtain the mining anchoring agent.

10. Use of the mining anchoring agent according to any one of claims 1 to 8 or the mining anchoring agent prepared by the preparation method according to claim 9 in mining.

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