Unit support reinforcing and supporting system for deeply-buried high-stress roadway

Abstract

The utility model discloses a unit support reinforcing and supporting system for a deeply-buried high-stress roadway. A modular truss support unit comprises four supporting trusses, four connecting anchor rods and an anchoring anchor rod. The supporting truss comprises a cross-shaped support, a connecting base, a fixing groove body and four intelligent pressure-bearing assemblies. Four support arms of the cross support are respectively provided with four strip-shaped grooves; the four connecting seats are connected to the end parts of the four supporting arms; the fixed groove body is mounted in the center of the cross-shaped support; the intelligent pressure-bearing assembly comprises a pressure-bearing support, a supporting hydraulic cylinder and a pressure sensor. The pressure-bearing support comprises a pressure-bearing plate and four strip-shaped insertion plates, and the four strip-shaped insertion plates are inserted into the four strip-shaped grooves. The supporting hydraulic cylinder is arranged between the bearing plate and the cross-shaped support; the connecting bases of every two adjacent supporting trusses are connected through connecting bolts. The four connecting anchor rods are respectively connected with the four phases of supporting trusses; and the anchoring anchor rod is anchored in the rock mass. The system can dynamically adapt to high-stress space-time distribution, and can accurately position a reinforcing key position.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal mine roadway support equipment, specifically relating to a unit support reinforcement system for deeply buried high-stress roadways. Background Technology

[0002] With the continuous increase in coal mining depth, the high ground stress and intense mining effects faced by deeply buried roadways are becoming increasingly severe, especially in the sidewalls of goaf roadways, the roof and floor of mid-roadways, and the areas at roadway intersections, where stress concentration is extremely significant. Taking a typical deep-well mining area as an example, the peak stress caused by mining can reach 2-3 times the original rock stress, inducing large deformations of the surrounding rock and even the risk of collapse, seriously restricting the safe and efficient production of the mine. Currently widely used reinforcement support methods include dense anchor bolt support, steel canopy erection, and full-section grouting. While these traditional methods offer some strength enhancement, they suffer from fundamental flaws: the support response exhibits significant lag, failing to detect the dynamic evolution of stress in real time, typically only passively reinforcing after significant deterioration of the surrounding rock deformation; furthermore, support location relies on engineering experience, making it difficult to accurately match the spatiotemporal migration characteristics of high-stress concentration zones, such as the stress gradient abrupt change zone 0.8m from the coal face in goaf roadways, which is often overlooked; additionally, traditional methods employ equal-strength redundant support, leading to a surge in material consumption, with support costs at roadway intersections accounting for over 35% of the total roadway cost. Therefore, to address the shortcomings of existing technologies, there is an urgent need for a unit-support reinforcement support system for deeply buried, high-stress roadways. Summary of the Invention

[0003] To address the problems existing in the prior art, this utility model provides a unit support reinforcement system for deeply buried high-stress roadways. This system can monitor the stress state of the surrounding rock in real time through pressure sensors integrated in the support nodes, and can actively control the support strength of the hydraulic cylinders. It can dynamically adapt to the spatiotemporal distribution of high stress, accurately locate key reinforcement positions, significantly reduce overall costs, and achieve active intervention in the stress initiation stage of the rock mass.

[0004] To achieve the above-mentioned objectives, this utility model provides a unit support reinforcement system for deeply buried high-stress roadways, including a modular truss support unit, an electromagnetic proportional valve, a hydraulic pump station, and a controller.

[0005] The modular truss support unit includes four supporting trusses, four connecting anchors, and one anchoring anchor.

[0006] The supporting truss includes a cross-shaped support, connecting seats, fixed slots, and four intelligent pressure-bearing components. Each of the four arms of the cross-shaped support has a set of sliding slots, each set consisting of four rectangular slots. The four connecting seats are fixedly connected to the outer ends of the four arms of the cross-shaped support. The fixed slots are fixedly installed in the central area of ​​one side of the cross-shaped support. The four intelligent pressure-bearing components correspond to the four sets of sliding slots and are located away from the fixed slots. Each intelligent pressure-bearing component includes a pressure-bearing bracket, a supporting hydraulic cylinder, and a pressure sensor. The pressure-bearing bracket includes a pressure plate and four rectangular strip plates fixedly connected to one side of the pressure plate. The four strip plates on the pressure-bearing bracket are correspondingly inserted into the four slots in the same set of sliding slots, forming a variable support space between the pressure plate, the four strip plates, and the arms of the cross-shaped support. The supporting hydraulic cylinder is located within this variable support space. The pressure sensor is installed at the end of the piston rod of the supporting hydraulic cylinder.

[0007] The four support trusses are arranged in a rectangular shape, and the connecting seats of adjacent support trusses are connected by connecting bolts;

[0008] The outer ends of the four connecting anchor rods are fixedly connected to the fixed grooves on the four supporting trusses, and their inner ends extend obliquely to the center of the four supporting trusses and are fixedly connected to each other.

[0009] The inner end of the anchoring rod is fixedly connected to the connection node of the four connecting anchor rods, and its outer end extends from the central area of ​​the four supporting trusses and is anchored in the rock mass, which is used to anchor the modular truss support unit to the surface of the tunnel.

[0010] The hydraulic pump station is connected to the support hydraulic cylinders in the four intelligent pressure-bearing components via four electromagnetic proportional valves.

[0011] The controller is connected to the pressure sensor, the hydraulic pump station, and the electromagnetic proportional valve, respectively.

[0012] Furthermore, in order to facilitate the rapid connection of the anchor rod and the cross support, the central area of ​​the fixing groove is provided with an installation groove for inserting the anchor rod.

[0013] As a preferred embodiment, the controller is a PLC controller, and the controller is installed in a control box on the side wall of the tunnel.

[0014] Furthermore, in order to facilitate timely and effective warning actions in the event of an anomaly, an alarm module is also included. The alarm module is installed in a control box on the side wall of the tunnel and connected to the controller.

[0015] Furthermore, in order to make the overall weight lighter while having strong load-bearing capacity to meet the safety support requirements of the roadway, the cross support is a hollow structure and is made of high-strength alloy with a tensile strength ≥785MPa.

[0016] Furthermore, in order to facilitate the acquisition of vibration data during the rock mass deformation process and to comprehensively perceive the situation of the rock mass deformation process, the intelligent pressure-bearing component also includes a vibration sensor, which is installed on the inner surface of the pressure plate and connected to the controller.

[0017] As a preferred embodiment, the pressure sensor is a miniature piezoelectric sensor.

[0018] As a preferred option, the connecting bolt is an M24 bolt.

[0019] In this invention, each supporting truss uses a cross-shaped support as its main support structure. This allows for extended coverage both laterally and vertically while maintaining a relatively light overall weight, effectively expanding the support range. By fixing connecting seats to the ends of the four arms of the cross-shaped support, reliable connections between adjacent supporting trusses can be easily achieved. This enables rapid assembly and expansion through cascading, further increasing the coverage of the support system. A fixing groove is fixedly connected to the central area of ​​the cross-shaped support, providing a convenient connection point for anchor bolts. A set of sliding slots is provided on each of the four arms of the cross-shaped support. The pressure-bearing bracket is then slidably inserted into the four slots via four strip plates. A support hydraulic cylinder and a pressure sensor are then installed between the pressure-bearing bracket and the cross-shaped support. This achieves a sliding connection between each intelligent pressure-bearing component and the cross-shaped support. The pressure sensor can then collect pressure signals at its location in real time, thereby enabling real-time monitoring of local stress data in the surrounding rock. Simultaneously, the extension and retraction of the support hydraulic cylinder can move the pressure-bearing bracket closer to or away from the cross-shaped support. Based on changes in local stress data, the controller can actively control the corresponding support hydraulic cylinder. When the local stress data exceeds a set threshold, the controller activates the electromagnetic proportional valve, supplying hydraulic oil to the rodless chamber of the support cylinder via the hydraulic pump station, effectively increasing the local support strength. When increased support force is required, the piston rod of the support hydraulic cylinder can be extended outward by a set length, allowing the pressure-bearing bracket to apply a greater load to the rock surface for greater support strength. Installing pressure sensors at the ends of the hydraulic cylinders allows each intelligent pressure-bearing component to detect real-time stress changes on the rock surface. This enables the controller to actively control the movement of the hydraulic cylinders based on stress changes, thus giving the support system active support capabilities. Four support trusses are arranged in a rectangular pattern, and connecting bolts are used to connect adjacent trusses. This creates a modular truss support unit with a large coverage area. Four connecting anchor rods are then fixed at one end to the fixing grooves on the four support trusses. The other ends of the four connecting anchor rods are also fixed to each other and to one end of an anchoring rod. The other end of the anchoring rod is then anchored into the rock mass. This allows for the installation of the modular truss support unit on the rock surface with only one anchoring rod required for anchoring. This achieves large-area support of the tunnel surface while effectively saving construction work, and ensures that all four support trusses have strain sensing capabilities and active reinforcement support capabilities.This invention possesses stress-adaptive capabilities, significantly improving the stability control of surrounding rock in deeply buried roadways. During support operations, this system can precisely locate key strain points and provide corresponding reinforcement, avoiding redundant support work. Compared to traditional support methods, it can reduce overall costs by more than 15%. The modular design, combined with adaptive hydraulic enhanced control, can reduce roadway deformation by over 40%, significantly improving the safety, reliability, and economic benefits of roadway support in deep, complex stress environments.

[0020] This system adopts a closed-loop mechanism of real-time perception and dynamic response. It can monitor the stress state of the surrounding rock in real time through pressure sensors integrated in the support nodes, and can actively control the support strength of the hydraulic cylinders. It can dynamically adapt to the spatiotemporal distribution of high stress, accurately locate key reinforcement positions, and significantly reduce overall costs. It can realize active intervention in the stress initiation stage of the rock mass, and provides an efficient and economical reinforcement solution for effectively solving the problem of safety control in high stress concentration areas in deep mining environments. It also breaks through the technical bottlenecks of traditional support systems, such as support lag, inaccurate reinforcement positions, and high costs. It is suitable for dynamic reinforcement support operations in high stress concentration areas such as goaf roadways, side roadways, and roadway intersections. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the support system in the roadway according to this utility model;

[0022] Figure 2 This is a schematic diagram of the planar structure of the modular truss support unit in this utility model;

[0023] Figure 3 This is a three-dimensional structural diagram of the modular truss support unit in this utility model;

[0024] Figure 4 This is a schematic diagram showing the connection status of the three supporting trusses in this utility model;

[0025] Figure 5 This is a schematic diagram of the planar structure of the supporting truss in this utility model;

[0026] Figure 6 This is a schematic diagram of the split structure of the supporting truss in this utility model. Figure 1 ;

[0027] Figure 7 This is a schematic diagram of the split structure of the supporting truss in this utility model. Figure 2 ;

[0028] Figure 8 This is a schematic diagram of the action logic of the supporting hydraulic cylinder in this utility model;

[0029] Figure 9This is a comparison diagram of the adaptive enhancement working state of the modular truss support unit when the stress exceeds the threshold in this utility model.

[0030] In the diagram: 1. Modular truss support unit, 2. Support truss, 3. Connecting anchor bolt, 4. Anchor bolt, 5. Cross support, 6. Pressure bearing bracket, 7. Support hydraulic cylinder, 8. Pressure sensor, 9. Strip groove, 10. Pressure bearing plate, 11. Strip insert plate, 12. Connecting seat, 13. Fixed groove, 14. Connecting bolt, 15. Intelligent pressure bearing component, 16. Tunnel, 17. Rock mass. Detailed Implementation

[0031] The present invention will be further described below with reference to the accompanying drawings.

[0032] like Figures 1 to 9 As shown, the present invention provides a unit support reinforcement system for deeply buried high-stress roadways, including a modular truss support unit 1, an electromagnetic proportional valve, a hydraulic pump station, and a controller.

[0033] The modular truss support unit 1 includes four supporting trusses 2, four connecting anchor rods 3 and one anchoring anchor rod 4;

[0034] The supporting truss 2 includes a cross support 5, connecting seats 12, fixing grooves 13, and four intelligent pressure-bearing components 15. Each of the four arms of the cross support 5 has a set of sliding slots, each set consisting of four rectangularly distributed strip grooves 9. The four connecting seats 12 are fixedly connected to the outer ends of the four arms of the cross support 5. The fixing grooves 13 are fixedly installed in the central area of ​​one side of the cross support 5. The four intelligent pressure-bearing components 15 correspond to the four sets of sliding slots and are located on the side away from the fixing grooves 13. Component 15 includes a pressure-bearing bracket 6, a supporting hydraulic cylinder 7, and a pressure sensor 8; the pressure-bearing bracket 6 includes a pressure plate 10 and four rectangular strip plates 11 fixedly connected to one side of the pressure plate 10. The four strip plates 11 on the pressure-bearing bracket 6 are correspondingly inserted into four strip slots 9 in the same set of sliding slots, and a variable support space is formed between the pressure plate 10, the four strip plates 11, and the support arm of the cross support 5; the supporting hydraulic cylinder 7 is disposed in the variable support space; the pressure sensor 8 is installed at the end of the piston rod of the supporting hydraulic cylinder 7;

[0035] The four support trusses 2 are distributed in a rectangular shape, and the connecting seats 12 of two adjacent support trusses 2 are connected by connecting bolts 14.

[0036] The outer ends of the four connecting anchor rods 3 are respectively fixedly connected to the fixed grooves 13 on the four supporting trusses 2, and their inner ends extend obliquely to the center of the four supporting trusses 2 and are fixedly connected to each other.

[0037] The inner end of the anchor rod 4 is fixedly connected to the connection node of the four connecting anchor rods 3, and its outer end extends from the central area of ​​the four supporting trusses 2 and is anchored in the rock mass 17, which is used to anchor the modular truss support unit 1 to the surface of the tunnel 16.

[0038] The hydraulic pump station is connected to the support hydraulic cylinders 7 in the four intelligent pressure-bearing components 15 via four electromagnetic proportional valves.

[0039] The controller is connected to pressure sensor 8, hydraulic pump station and electromagnetic proportional valve respectively.

[0040] As a preferred embodiment, the sampling frequency of the pressure sensor 8 is ≥10Hz, and more preferably 12Hz.

[0041] As a preferred option, the maximum stroke of the supporting hydraulic cylinder 7 is 140 mm;

[0042] To facilitate the rapid connection of the anchor rod and the cross support, the central area of ​​the fixing groove 13 is provided with an installation groove for inserting the anchor rod 3.

[0043] As a preferred embodiment, the controller is a PLC controller, and the controller is installed in a control box on the side wall of the tunnel 16.

[0044] To facilitate timely and effective warning actions in the event of an anomaly, an alarm module is also included. The alarm module is installed in a control box on the side wall of tunnel 16 and connected to the controller.

[0045] To achieve a lightweight yet robust load-bearing capacity to meet the safety support requirements of the roadway, the cross support 5 is a hollow structure made of high-strength alloy with a tensile strength ≥785MPa. As a further preferred embodiment, the height and width of the cross support 5 are both 1.5m.

[0046] To facilitate the acquisition of vibration data during rock mass deformation and enable comprehensive perception of the deformation process, the intelligent pressure-bearing component 15 also includes a vibration sensor. The vibration sensor is mounted on the inner surface of the pressure plate 10 and connected to the controller. Preferably, the sampling frequency of the vibration sensor is ≥10Hz. To simplify the cable laying process, the vibration sensor is equipped with wireless communication capabilities.

[0047] As a preferred embodiment, the pressure sensor 8 is a miniature piezoelectric sensor with an explosion-proof rating of Exib I. To simplify the cable laying process, the pressure sensor 8 is a pressure sensor with wireless communication capabilities.

[0048] As a preferred embodiment, the connecting bolt 14 is an M24 bolt.

[0049] In practical applications, the number and cascading method of the modular truss support units 1 can be used to form a continuous support belt or a large-area support network. Preferably, the modular truss support units 1 can be arranged at key locations in the high-stress concentration areas of the roadway, specifically including the sidewall area of ​​the goaf roadway (0.5m to 1.0m from the coal wall), the area where the stress gradient of the bottom plate of the waist roadway changes by ≥5MPa / m, and the central radiation area of ​​the roof at the roadway intersection (coverage radius ≥2m). When applied to the sidewall of the goaf roadway, the center line of the support is precisely fixed at a position 0.8m from the coal wall (error ±0.1m). The measured stress gradient at this location reaches 8.3MPa / m. This deployment position can follow the spatiotemporal evolution law of the high-stress area and can effectively solve the problem that the surrounding rock of the goaf roadway, waist roadway, and roadway intersection area is prone to high stress concentration and the traditional support effect is not good under deep buried high-stress conditions.

[0050] During installation, laser ranging and positioning technology was used to calibrate spatial coordinates. Using the roadway centerline as a reference, positioning marks were set 0.8 meters from the coal face (with a construction tolerance of ±0.1 meters). The support coverage radius at intersections was 2.2 meters (error rate <5%). In the mid-roadway area, the installation position was identified based on a stress gradient ≥5 MPa / m, a distance optimized from three explorations of the stress gradient abrupt change zone. During operation, a mine explosion-proof total station was first used for layout, followed by fixing the cross support 5 using a hydraulic fine-tuning device, ensuring that the deviation between the sidewall support centerline and the theoretical position did not exceed 1.5% of the roadway width. In the mid-roadway area, a mine stress gradient meter (range 0-50 MPa / m, resolution 0.1 MPa / m) was used to identify the installation area, activating support deployment only when the stress gradient ∇σ ≥ 5 MPa / m. This spatial positioning method, combining precise measurement and critical criteria, increased the support coverage rate in high-stress areas to over 96% (compared to 71-83% in traditional methods), eliminating reinforcement failure due to positional deviations.

[0051] After applying the system to the intersection of the S1208 working face in a certain location: the support network setup time was ≤2 hours, the maximum subsidence of the roof after reinforcement was reduced from 326mm to 187mm, and the cost of support materials was reduced by approximately 18.7%. The hydraulic cylinder 7 automatically activated the resistance-increasing mechanism when the stress peak was 26MPa, effectively suppressing the propagation of shear fractures in the surrounding rock (data was observed on-site using a viewing instrument). In the dynamic resistance-variable mechanism, the controller senses the surrounding rock stress data in real time through pressure sensor 8. When the stress value exceeds the preset threshold σ0 (15-25 MPa, which is set based on the statistical analysis of the mine pressure manifestation characteristics of the N2105 working face of this coal mine over 300 hours) after monitoring for 5 seconds, the controller controls the corresponding electromagnetic proportional valve to act, and injects high-pressure oil into the rodless chamber of the corresponding support hydraulic cylinder 7 through the hydraulic pump station, so that the support force output by the support hydraulic cylinder 7 increases from the benchmark value of 20 MPa to 28 MPa (an increase of about 120%-150%), and the piston rod of the corresponding support hydraulic cylinder 7 extends by about 60 mm. At this time, the support system enters the enhanced mode, which can effectively control conditions such as roof subsidence. Figure 8 As shown. To more accurately collect stress data of the surrounding rock, the controller can simultaneously sense the vibration data of the rock mass 17 during deformation in real time based on vibration sensors. This allows for the formation of a stress monitoring network through pressure sensors 8 and vibration sensors, enabling more precise sensing of stress changes in the surrounding rock. This dynamic resistance enhancement process based on stress threshold determination achieves the theoretically optimal effect of roadway deformation suppression: field measurement data shows that the maximum roof subsidence δ_max is controlled within 58% of the initial deformation δ (i.e., a reduction of ≥42%), the overall cost is reduced by 18.7%, and the propagation path of shear fractures in the surrounding rock is effectively blocked (see the borehole inspection video of the S1208 working face for details). Specifically, the adaptive enhancement working state comparison diagram of the system is shown below. Figure 9 As shown, 1 is the stress curve of the inner edge of the unreinforced stent, 2 is the stress curve of the outer edge of the reinforced stent, 3 is the stress curve of the inner edge of the reinforced stent, and 4 is the stress curve of the outer edge of the unreinforced stent.

[0052] In this invention, each supporting truss uses a cross-shaped support as its main support structure. This allows for extended coverage both laterally and vertically while maintaining a relatively light overall weight, effectively expanding the support range. By fixing connecting seats to the ends of the four arms of the cross-shaped support, reliable connections between adjacent supporting trusses can be easily achieved. This enables rapid assembly and expansion through cascading, further increasing the coverage of the support system. A fixing groove is fixedly connected to the central area of ​​the cross-shaped support, providing a convenient connection point for anchor bolts. A set of sliding slots is provided on each of the four arms of the cross-shaped support. The pressure-bearing bracket is then slidably inserted into the four slots via four strip plates. A support hydraulic cylinder and a pressure sensor are then installed between the pressure-bearing bracket and the cross-shaped support. This achieves a sliding connection between each intelligent pressure-bearing component and the cross-shaped support. The pressure sensor can then collect pressure signals at its location in real time, thereby enabling real-time monitoring of local stress data in the surrounding rock. Simultaneously, the extension and retraction of the support hydraulic cylinder can move the pressure-bearing bracket closer to or away from the cross-shaped support. Based on changes in local stress data, the controller can actively control the corresponding support hydraulic cylinder. When the local stress data exceeds a set threshold, the controller activates the electromagnetic proportional valve, supplying hydraulic oil to the rodless chamber of the support cylinder via the hydraulic pump station, effectively increasing the local support strength. When increased support force is required, the piston rod of the support hydraulic cylinder can be extended outward by a set length, allowing the pressure-bearing bracket to apply a greater load to the rock surface for greater support strength. Installing pressure sensors at the ends of the hydraulic cylinders allows each intelligent pressure-bearing component to detect real-time stress changes on the rock surface. This enables the controller to actively control the movement of the hydraulic cylinders based on stress changes, thus giving the support system active support capabilities. Four support trusses are arranged in a rectangular pattern, and connecting bolts are used to connect adjacent trusses. This creates a modular truss support unit with a large coverage area. Four connecting anchor rods are then fixed at one end to the fixing grooves on the four support trusses. The other ends of the four connecting anchor rods are also fixed to each other and to one end of an anchoring rod. The other end of the anchoring rod is then anchored into the rock mass. This allows for the installation of the modular truss support unit on the rock surface with only one anchoring rod required for anchoring. This achieves large-area support of the tunnel surface while effectively saving construction work, and ensures that all four support trusses have strain sensing capabilities and active reinforcement support capabilities.This invention possesses stress-adaptive capabilities, significantly improving the stability control of surrounding rock in deeply buried roadways. During support operations, this system can precisely locate key strain points and provide corresponding reinforcement, avoiding redundant support work. Compared to traditional support methods, it can reduce overall costs by more than 15%. The modular design, combined with adaptive hydraulic enhanced control, can reduce roadway deformation by over 40%, significantly improving the safety, reliability, and economic benefits of roadway support in deep, complex stress environments.

[0053] This system adopts a closed-loop mechanism of real-time perception and dynamic response. It can monitor the stress state of the surrounding rock in real time through pressure sensors integrated in the support nodes, and can actively control the support strength of the hydraulic cylinders. It can dynamically adapt to the spatiotemporal distribution of high stress, accurately locate key reinforcement positions, and significantly reduce overall costs. It can realize active intervention in the stress initiation stage of the rock mass, and provides an efficient and economical reinforcement solution for effectively solving the problem of safety control in high stress concentration areas in deep mining environments. It also breaks through the technical bottlenecks of traditional support systems, such as support lag, inaccurate reinforcement positions, and high costs. It is suitable for dynamic reinforcement support operations in high stress concentration areas such as goaf roadways, side roadways, and roadway intersections.

Claims

1. A unit-support reinforcement system for deeply buried high-stress roadways, comprising modular truss support units (1), characterized in that, It also includes electromagnetic proportional valves, hydraulic pump stations, and controllers; The modular truss support unit (1) includes four supporting trusses (2), four connecting anchors (3) and one anchoring anchor (4). The supporting truss (2) includes a cross support (5), a connecting seat (12), a fixing groove (13), and four intelligent pressure-bearing components (15); each of the four arms of the cross support (5) is provided with a set of sliding slots, each set of sliding slots consisting of four rectangularly distributed strip slots (9); the four connecting seats (12) are fixedly connected to the outer ends of the four arms of the cross support (5); the fixing groove (13) is fixedly installed in the central area of ​​one side of the cross support (5); the four intelligent pressure-bearing components (15) correspond to the four sets of sliding slots respectively and are located on the side away from the fixing groove (13); the intelligent pressure-bearing components (15) 5) Includes a pressure-bearing bracket (6), a supporting hydraulic cylinder (7), and a pressure sensor (8); the pressure-bearing bracket (6) includes a pressure plate (10) and four strip-shaped inserts (11) fixedly connected to one side of the pressure plate (10) in a rectangular shape. The four strip-shaped inserts (11) on the pressure-bearing bracket (6) are correspondingly inserted into the four strip-shaped slots (9) in the same set of sliding slots, and a variable support space is formed between the pressure plate (10), the four strip-shaped inserts (11), and the support arm of the cross support (5); the supporting hydraulic cylinder (7) is set in the variable support space; the pressure sensor (8) is installed at the end of the piston rod of the supporting hydraulic cylinder (7); The four support trusses (2) are distributed in a rectangular shape, and the connecting seats (12) of two adjacent support trusses (2) are connected by connecting bolts (14); The outer ends of the four connecting anchor rods (3) are fixedly connected to the fixed grooves (13) on the four supporting trusses (2) respectively, and their inner ends extend obliquely to the center of the four supporting trusses (2) and are fixedly connected to each other. The inner end of the anchor rod (4) is fixedly connected to the connection node of the four connecting anchor rods (3), and its outer end extends from the central area of ​​the four supporting trusses (2) and is anchored in the rock mass (17) to anchor the modular truss support unit (1) to the surface of the tunnel (16). The hydraulic pump station is connected to the support hydraulic cylinder (7) in the four intelligent pressure-bearing components (15) through four electromagnetic proportional valves respectively; The controller is connected to the pressure sensor (8), the hydraulic pump station and the electromagnetic proportional valve respectively.

2. The unit support reinforcement system for deeply buried high-stress roadways according to claim 1, characterized in that, The central area of ​​the fixed groove (13) is provided with an installation groove for inserting and connecting the anchor rod (3).

3. The unit support reinforcement system for deeply buried high-stress roadways according to claim 2, characterized in that, The controller is a PLC controller, and the controller is installed in a control box on the side wall of the tunnel (16).

4. A unit support reinforcement system for deeply buried high-stress roadways according to claim 3, characterized in that, It also includes an alarm module, which is installed in a control box on the side wall of the tunnel (16) and connected to the controller.

5. A unit support reinforcement system for deeply buried high-stress roadways according to claim 4, characterized in that, The cross support (5) is a hollow structure and is made of high-strength alloy with a tensile strength ≥785MPa.

6. A unit support reinforcement system for deeply buried high-stress roadways according to claim 4, characterized in that, The intelligent pressure-bearing component (15) also includes a vibration sensor, which is installed on the inner surface of the pressure plate (10) and connected to the controller.

7. A unit support reinforcement system for deeply buried high-stress roadways according to claim 4, characterized in that, The pressure sensor (8) is a miniature piezoelectric sensor.

8. A unit support reinforcement system for deeply buried high-stress roadways according to claim 4, characterized in that, The connecting bolt (14) is an M24 bolt.

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