A composite anchor cable device for slope reinforcement in open-pit mines

Abstract

This application belongs to the field of slope reinforcement technology and discloses a composite anchor cable device for open-pit mine slope reinforcement, comprising: a carbon fiber inner layer, an outer carbon fiber layer covering the inner layer, an optical fiber layer disposed between the inner and outer layers, and an optical fiber sensor for real-time detection of axial tensile strain of the anchor cable disposed within the optical fiber layer. The radial compressive stress generated by the shrinkage of the resin during curing is used to achieve full circumferential fixation of the optical fiber sensor embedded inside the anchor cable, thereby improving the accuracy of strain monitoring and obtaining real-time and reliable monitoring data on anchor cable stress changes.

Description

Technical Field

[0001] This utility model belongs to the field of slope reinforcement technology, and in particular relates to a composite anchor cable device for slope reinforcement in open-pit mines. Background Technology

[0002] Most existing slope reinforcement anchor cables adopt traditional reinforced concrete anchor cables or all-steel anchor cable structures. Although they have high strength, they have the following main problems: under long-term dynamic loads (such as mining vibrations and slope sliding), traditional anchor cables have poor fatigue resistance and are difficult to monitor stress state, which may lead to anchor cable breakage or failure. Although carbon fiber anchor cables have high tensile strength, the failure of carbon fiber is unpredictable.

[0003] Based on the above analysis, the problems and shortcomings of the existing technology are as follows: the failure of carbon fiber anchor cables is sudden, making it difficult to provide a real-time and reliable monitoring method. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an anchor cable device and its arrangement method for reinforcing open-pit mine slopes.

[0005] This utility model is implemented as follows: a composite anchor cable device for reinforcing open-pit mine slopes, comprising:

[0006] The structure consists of a carbon fiber inner layer, an outer carbon fiber layer covering the inner layer, and an optical fiber layer between the inner and outer layers. Inside the optical fiber layer is an optical fiber sensor for real-time detection of axial tensile strain in the anchor cable.

[0007] Furthermore, the inner carbon fiber layer and the outer carbon fiber layer are bonded together by a thermosetting resin matrix.

[0008] Furthermore, the fiber optic sensor is fixed to the inner and outer layers of carbon fiber via a thermosetting resin matrix.

[0009] Furthermore, the anchor cable has continuous spiral protrusions at both ends.

[0010] Furthermore, the anchor cable has metal ends connected at both ends by a continuous spiral protrusion structure.

[0011] Furthermore, the metal end includes a tapered sleeve.

[0012] Furthermore, the tapered sleeve is provided with a backstop flange at its end to prevent relative displacement between the metal sleeve and the composite material during the anchor cable tensioning process.

[0013] Furthermore, semi-cured epoxy tape is wrapped around the threaded connection between the tapered sleeve and the continuous spiral protrusion structure.

[0014] Furthermore, the conical sleeve is filled with an epoxy resin filler layer to form a continuous transition layer.

[0015] Furthermore, a waterproof adhesive layer is provided on the exposed surface of the epoxy resin filler layer at the enlarged end of the tapered sleeve away from the anchor cable.

[0016] In summary, the beneficial effects achieved by this application are as follows: the resin matrix forms a continuous coating layer on the carbon fiber surface, avoiding the formation of erosion channels between water vapor and sulfides, and significantly improving the tensile strength retention rate in acidic mine water environments; during the molding stage, fiber Bragg grating sensors are pre-embedded between the carbon fiber layers, and the radial compressive stress generated by the resin curing shrinkage is used to achieve full circumferential fixation of the sensors; at the same time, the thermal expansion coefficients of carbon fiber and optical fiber are similar, avoiding signal interference caused by monitoring signal drift due to temperature changes in the mine, thereby improving the accuracy of strain monitoring and obtaining real-time and reliable monitoring data on anchor cable stress changes.

[0017] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0018] Figure 1 This is a schematic cross-sectional view of the anchor cable body provided in the embodiments of this application;

[0019] Figure 2 This is a schematic diagram showing the connection of the anchor cable body directly connected to the borehole in the embodiments of this application;

[0020] Figure 3 This is a schematic diagram of the connection structure between the anchor cable body and the tapered sleeve provided in the embodiments of this application;

[0021] Figure 4 This is a schematic diagram of the arrangement method of a composite anchor cable device for slope reinforcement in an open-pit mine, provided in the embodiments of this application.

[0022] Figure 5 This is a schematic diagram of the first optimized process for S101 in the process flow of the composite anchor cable device arrangement method for open-pit mine slope reinforcement provided in the embodiments of this application;

[0023] Figure 6 This is a schematic diagram of the second optimized process for S101 in the process flow of the composite anchor cable device arrangement method for open-pit mine slope reinforcement provided in the embodiments of this application;

[0024] Figure 7This is a schematic diagram of the optimized process for S104 in the process of arranging a composite anchor cable device for slope reinforcement in an open-pit mine, as provided in the embodiments of this application.

[0025] Figure 8 This is a schematic diagram of the optimized process for S105 in the process of arranging a composite anchor cable device for slope reinforcement in an open-pit mine, as provided in the embodiments of this application.

[0026] Figure 9 This is a schematic diagram of the optimized process for S107 in the process of arranging a composite anchor cable device for slope reinforcement in an open-pit mine, as provided in the embodiments of this application.

[0027] Explanation of reference numerals in the attached drawings: 1. Inner carbon fiber layer; 2. Outer carbon fiber layer; 3. Optical fiber layer; 4. Continuous spiral protrusion structure; 5. Conical sleeve; 6. Anti-reverse flange; 7. Epoxy resin filler layer; 8. Waterproof adhesive layer. Detailed Implementation

[0028] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0030] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0031] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0032] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0033] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0034] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0035] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0036] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0037] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0038] Reference Figure 1A composite anchor cable device for slope reinforcement in open-pit mines includes an anchor cable body, an anchoring section design module, and a sensor detection module. The anchoring section design module is connected to the end of the anchor cable body and is used to design a threaded structure on the surface of the anchor cable to increase the contact area with the grouting material.

[0039] The sensing and monitoring module is embedded inside the anchor cable body and connected to the anchoring section design module. It is used to monitor the stress, displacement and temperature changes of the anchor cable. The sensor module uses a fiber Bragg grating sensor to collect signals and analyzes the wavelength shift of light waves based on the principle of light wave reflection to evaluate the stress state of the anchor cable.

[0040] The composite fiber anchor cable body comprises a carbon fiber inner layer 1, an optical fiber layer 3, and a carbon fiber outer layer 2. The carbon fiber inner layer 1 and outer layer 2 are multi-layered, woven from triaxially woven T700 grade carbon fiber cloth as reinforcement, and molded using a vacuum-assisted resin transfer molding process with low-viscosity epoxy resin. A distributed fiber Bragg grating sensor array (hereinafter referred to as the fiber sensor) is pre-embedded within the optical fiber layer 3 between the carbon fiber inner layer 1 and the carbon fiber outer layer 2. The radial compressive stress generated by the resin curing shrinkage is used to achieve full circumferential fixation of the fiber sensor. This process enables the fiber sensor to form a molecular-level bond with the carbon fiber matrix, eliminating strain transfer loss caused by interfacial micro-gaps. Simultaneously, the thermal expansion coefficient of the high-modulus carbon fiber at a high fiber volume fraction can match the thermal expansion of the optical fiber along the fiber direction, thereby controlling the monitoring drift caused by the diurnal temperature difference in open-pit mines within an acceptable range, resulting in considerably high measurement accuracy.

[0041] Reference Figure 2 The anchoring section design module uses CNC machine tool molding to process a continuous spiral protrusion structure 4 with a depth of 2.0±0.1 mm, a pitch of 15 mm, and an inclination angle of 45 degrees on the anchor cable surface. A 0.2 mm rounded corner is set at the root of the thread to eliminate stress concentration. The continuous spiral protrusion structure 4 forms a three-level mechanical interlocking structure of resin-grout-rock mass after the cement grout penetrates. When the slope is subjected to blasting vibration, the 45-degree inclination angle of the continuous spiral protrusion structure 4 decomposes the shear force at the grout-rock hole interface into axial compressive stress, significantly suppressing the risk of overall anchor cable pull-out caused by chemical bond failure. The continuous spiral protrusion structure 4 works in conjunction with fiber optic sensors during the molding stage. During the resin curing process, the fiber Bragg grating sensor detects the shrinkage stress of the matrix in real time, ensuring that the thread reaches the design tensile strength before demolding. During service, the mechanical interlocking of the continuous spiral protrusion structure 4 stabilizes the fiber optic sensing environment and avoids damage to the internal sensor due to direct exposure to rock mass stress.

[0042] The sensing and monitoring module uses a distributed demodulator to analyze the wavelength offset of the fiber optic sensor in real time and calculate the axial strain ε of the anchor cable. When a sudden change in strain gradient or microcrack signal (wavelength step > 0.5 nm) is detected, the system automatically triggers an audible and visual alarm and locates the failure section. The electromagnetic interference resistance of quartz optical fiber ensures data reliability even under the strong electromagnetic field of open-pit mine drilling rigs. Combined with the slope stress cloud map to customize thread parameters, a self-optimizing cycle of damage perception and structural optimization is formed.

[0043] Reference Figure 2 In other embodiments, an anchor cable device for reinforcing open-pit mine slopes further includes an installation and grouting module. This module is connected to a sensing and monitoring module and is used to install the anchor cable into the borehole, achieving tight anchoring through a high-flowability cement-based grout and a continuous spiral protrusion structure 4. Simultaneously, an automatic installation device ensures precise installation in complex terrain. In this embodiment, the installation and grouting module includes a six-axis hydraulic robotic arm integrating a high-precision inertial navigation module, with a roller conveyor at the end of the robotic arm. During construction, the implantation path is planned based on a three-dimensional geological model of the slope, and the robotic arm automatically adjusts the borehole inclination angle. For fractured rock masses or steep slopes, the roller conveyor pushes the anchor cable at a constant speed of 0.5 meters per second and monitors the rock wall friction resistance in real time to ensure that the continuous spiral protrusion structure 4 of the anchor cable does not deform due to collision.

[0044] Reference Figure 3 In other embodiments, the anchor cable is further provided with metal ends at both ends. The metal ends are designed and processed by the anchoring section design module. In this embodiment, the metal ends include a conical sleeve 5 forged from alloy steel, with the cone angle optimized to a specific angle based on the elastic mechanical stress diffusion theory. The inner wall of the conical sleeve 5 is machined with reverse spiral grooves and shot-peened. After the surface roughness is controlled, it is hot-dip galvanized. An annular anti-reverse flange 6 is provided at the end of the conical structure to prevent relative displacement between the metal sleeve and the composite material during anchor cable tensioning.

[0045] The tapered sleeve 5 is preheated to a specific temperature range, while epoxy tape containing nanofillers is wrapped around the end of the carbon fiber anchor cable. After the epoxy tape reaches a semi-cured state through heat radiation, the anchor cable is screwed into the sleeve and axial pressure is applied.

[0046] Under inert gas protection, the epoxy resin impregnation of the conical sleeve 5 is completed according to a gradient heating program. After cooling, an epoxy resin filling layer 7 is formed to suppress the interfacial stress caused by the difference in thermal expansion coefficients between the metal and the composite material.

[0047] The surface of the epoxy resin filling layer 7 exposed in the rock mass is covered with a waterproof adhesive to form a waterproof adhesive layer 8, which avoids the slow influence of acidic groundwater on the epoxy resin filling layer 7.

[0048] The tapered structure of the tapered sleeve 5 decomposes the tension force into axial and radial components. The axial component is transmitted to the carbon fiber anchor cable body through the resin filling layer 7, achieving uniform load distribution. The radial component squeezes the grout in the hole wall, enhancing the grout-rock interlocking effect. When the rock mass undergoes creep displacement, the mechanical locking mechanism of the spiral groove inside the tapered sleeve 5 can delay interface debonding and maintain the stability of the anchoring force.

[0049] Reference Figure 3 and Figure 4 This application also discloses a method for arranging a composite anchor cable device for reinforcing open-pit mine slopes, comprising the following steps:

[0050] S101. Initial slope stability analysis and anchor cable layout analysis;

[0051] S102. Customize the length, diameter, and surface thread structure of fiber composite anchor cables according to the stress distribution of the slope.

[0052] This embodiment provides four specific designs for relatively common mining geological environment conditions, but this does not mean that this application only has these four settings.

[0053] For steep rock slopes, the anchor cable inclination angle is set to 20-25 degrees perpendicular to the normal of the main joint surface, and the spacing is reduced to 1.5m x 1.5m. The reverse spiral grooves of the conical sleeve guide the grout to seep into the fissures, forming a mechanical interlock. Simultaneously, embedded fiber optic sensors monitor joint opening strain. Vertical deployment maximizes shear resistance, and denser placement compensates for the stress diffusion effect of rock fragmentation. In slopes with weak interlayers, anchor cables with an inclination angle of -10 degrees are arranged axially vertically, ensuring the free section covers the thickness of the sliding mass and the anchored section penetrates the bedrock ≥4.5 meters. The continuous spiral protrusion structure converts interfacial shear stress into radial compressive stress. Combined with high-flowability grout penetrating the interlayer and solidifying it, this enhances bond strength and directly inhibits soil slippage along the contact surface. For acidic slopes... In the case of groundwater environments, a triple protection system is required, consisting of a 1.2 mm carbon fiber resin coating, chrome-plated conical sleeves, and inclined drainage holes. An epoxy resin filling layer blocks acid corrosion pathways, the chrome plating delays metal corrosion, and the drainage holes reduce pore water pressure. Fiber optic sensors simultaneously monitor the propagation of microcracks in the anchor bolts for early warning. For areas affected by blasting vibrations, the anchor cable spacing is reduced to 1.8 m × 1.8 m, the thread depth is increased to 8 mm, and the sampling frequency of the fiber optic sensors is increased to 200 Hz. This system disperses dynamic load impacts through denser arrangement, enhances the grout's interlocking fatigue resistance through deep threads, captures transient strain through high-frequency sampling, and optimizes stress diffusion paths using the conical structure of the conical sleeve, all working together to resist fatigue failure of the anchoring system caused by dynamic loads.

[0054] S103. The anchor cable is manufactured using a molding process, and an optical fiber sensor is embedded in the anchor cable.

[0055] After determining the anchor cable dimensions, the carbon fiber reinforcement is pre-tensioned after standardized cutting to eliminate internal stress. The tapered sleeve is machined with internal threads and chrome-plated to enhance corrosion resistance. Simultaneously, grouting channels are machined to prepare for subsequent adhesive injection. After wrapping epoxy tape around the anchoring section, a 45-degree inclined thread structure is hot-pressed and bonded to the surface of the composite fiber anchor cable. The diameter of the anchoring section is increased through hot extrusion to form an anti-slip cone. The threaded section is screwed into the metal sleeve, and an epoxy resin filling layer is injected to fill the interface gap. Water-proof adhesive is applied to both ends of the sleeve to form a water-proof adhesive layer, preventing acidic groundwater from causing slow degradation of the epoxy resin filling layer. Single-mode optical fibers are pre-embedded along the axial direction of the carbon fiber reinforcement and sheared with miniature stainless steel capillary tubes. The optical fiber lead-out end is connected to a ceramic ferrule connector, and a sealed channel is reserved in the metal sleeve for fiber threading. The signal stability is tested by powering on.

[0056] S104. Drilling and anchor cable installation;

[0057] S105. Activate the fiber optic sensor embedded in the anchor cable to monitor the stress of the anchor cable and the displacement of the slope in real time.

[0058] The embedded fiber optic sensor in the anchor cable is activated to calculate the axial strain of the anchor cable in real time, and local sudden strain and displacement rate sudden change warning is set. The threshold is set based on the rock mass creep constitutive model, corresponding to the critical state of slope shear slip.

[0059] S106. Adjust reinforcement measures dynamically based on sensor data;

[0060] S107. Subsequent maintenance and analysis.

[0061] Fiber optic sensors, combined with the Bragg wavelength variation formula, monitor the deformation and stress state of anchor cables.

[0062] Bragg wavelength variation formula:

[0063]

[0064] in:

[0065] : The change in Bragg wavelength;

[0066] Initial Bragg wavelength;

[0067] PE: Effective Poisson's ratio of optical fiber;

[0068] Anchor cable strain.

[0069] Based on sensor data, the reinforcement measures are dynamically adjusted;

[0070] Subsequent maintenance and analysis.

[0071] Reference Figure 5In some other embodiments, S101 further includes:

[0072] S1011. Use drones and ground-based laser scanning technology to create a 3D model of the slope;

[0073] S1012. Combine the limit equilibrium method and the finite element method to analyze the potential instability zone of the slope and optimize the arrangement, quantity and inclination angle of the anchor cables;

[0074] By fusing aerial surveying by UAVs with ground-based laser scanning, a three-dimensional digital twin model of the slope with centimeter-level precision is constructed, accurately reconstructing the distribution of rock mass structural surfaces, weak interlayers, and fracture networks. This model can automatically extract key parameters such as rock mass quality indicators and joint orientation, and, combined with microseismic monitoring data, predict high-risk slip zones, thus avoiding the risk of anchor cables being installed in weak zones of rock bridges.

[0075] The limit equilibrium method can quickly locate potential slip surfaces and calculate safety factors, while the finite element method quantifies the distribution of plastic zones under various working conditions such as blasting vibration and rainfall infiltration, accurately identifying high stress gradient zones. The dual algorithms work together to output stress cloud maps, which can guide the dynamic adaptation of anchor cable parameters.

[0076] Reference Figure 6 In other embodiments, S101 further includes:

[0077] S1013. Calculate the potential instability zone of the slope using the limit equilibrium analysis model to guide the placement of anchor cables;

[0078] Stability coefficient calculation formula:

[0079]

[0080] in:

[0081] : Anti-slip force

[0082] Sliding force

[0083] c: Soil cohesion;

[0084] : Angle of internal friction;

[0085] L: Length of the sliding surface;

[0086] N: Force perpendicular to the sliding surface;

[0087] T: Shear force along the sliding surface;

[0088] S1014. Analyze the stress distribution of fiber composite anchor cables using anchor cable stress models;

[0089] Formula for calculating the tensile strength of anchor cables:

[0090]

[0091] in:

[0092]

[0093]

[0094]

[0095] Formula for the bond strength between the anchor cable and the grouting interface:

[0096]

[0097] in:

[0098] Bond strength;

[0099] P: Axial force borne by the anchor cable;

[0100] d: Anchor cable diameter;

[0101] L: Length of the anchorage section.

[0102] Reference Figure 7 In some other embodiments, S104 further includes:

[0103] S1041. Use high-precision drilling equipment to drill holes at designated locations on the slope, ensuring that the hole diameter matches the anchor cable diameter.

[0104] S1042. When installing anchor cables, use a quantitative grouting system and pressure grouting method to tightly connect the anchor cables to the slope.

[0105] High-precision down-the-hole drills are used for dry drilling, and precise hole diameter control ensures that the gap between the threaded groove and the hole wall is ≤5 mm, creating conditions for high-pressure grouting to form a uniform coating layer. The robotic arm is controlled by an inertial navigation module to deliver the anchor cable to the bottom of the hole. The streamlined contour of the conical sleeve guides the grout to fill the borehole, and the rigid structure resists the friction of the hole wall, eliminating damage to the optical fiber caused by the transport collision. High-fluidity cement-based grout is injected by the bottom-hole return grouting method, and the grouting pressure is maintained until the grout overflows from the hole opening.

[0106] Reference Figure 8 In some other embodiments, S105 further includes:

[0107] S1051. Monitor the deformation and stress state of the anchor cable using the Bragg wavelength variation formula.

[0108] Bragg wavelength variation formula:

[0109]

[0110] in:

[0111] : The change in Bragg wavelength;

[0112] Initial Bragg wavelength;

[0113] PE: Effective Poisson's ratio of optical fiber;

[0114] Anchor cable strain.

[0115] Reference Figure 9 In some other embodiments, S107 specifically includes:

[0116] S1071. Regularly collect monitoring data on anchor cables and slopes, and use machine learning algorithms to predict the possible failure time of anchor cables, providing accurate maintenance guidance.

[0117] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any modifications, equivalent substitutions, and improvements made by those skilled in the art within the scope of the technology disclosed in this application, and within the spirit and principles of this application, should be included within the scope of protection of this application.

[0118] It should be noted that this application is not limited to the above-described embodiments. The above embodiments are merely examples, and any embodiments with the same structure and effect as the technical concept within the scope of this application are included in the technical scope of this application. Furthermore, various modifications that can be conceived by those skilled in the art to the embodiments, and other ways of constructing by combining some of the constituent elements of the embodiments, without departing from the spirit of this application, are also included in the scope of this application.

Claims

1. A composite anchor device for reinforcing a slope of an open pit mine, characterized in that, include: A carbon fiber inner layer (1) is covered with a carbon fiber outer layer (2). An optical fiber layer (3) is provided between the carbon fiber inner layer (1) and the carbon fiber outer layer (2). An optical fiber sensor for real-time detection of axial tensile strain of the anchor cable is provided inside the optical fiber layer (3).

2. The composite anchor cable device for slope reinforcement in open-pit mines according to claim 1, characterized in that, The inner carbon fiber layer (1) and the outer carbon fiber layer (2) are bonded together by a thermosetting resin matrix.

3. The composite anchor cable device for reinforcing the open-pit mine slope according to claim 1, characterized in that, The fiber optic sensor is fixed to the inner carbon fiber layer (1) and the outer carbon fiber layer (2) through a thermosetting resin matrix.

4. The composite anchor cable device for reinforcing the open-pit mine slope according to claim 1, characterized in that, The anchor cable has a continuous spiral protrusion structure at both ends (4).

5. The composite anchor cable device for reinforcing the slope of an open pit mine according to claim 4, characterized in that, The anchor cable has metal ends connected to both ends by the continuous spiral protrusion structure (4).

6. The composite cable for reinforcing the open-pit mine slope according to claim 5, characterized in that, The metal end includes a tapered sleeve (5).

7. The composite anchor cable device for slope reinforcement in open-pit mines according to claim 6, characterized in that: The tapered sleeve (5) is provided with a backstop flange (6) at its end to prevent relative displacement between the metal sleeve and the composite material during the anchor cable tensioning process.

8. The composite cable for reinforcing the open-pit mine slope according to claim 7, characterized in that: The tapered sleeve (5) and the continuous spiral protrusion structure (4) are connected by a semi-cured epoxy tape.

9. The composite cable for reinforcing the open-pit mine slope according to claim 7, characterized in that: The conical sleeve (5) is filled with an epoxy resin filler layer (7) to form a continuous transition layer.

10. The composite anchor cable device for slope reinforcement in open-pit mines according to claim 9, characterized in that: The conical sleeve (5) has an enlarged end portion away from the anchor cable with a waterproof adhesive layer (8) on the exposed surface of the epoxy resin filling layer (7) in the soil.

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