A tunnel surrounding rock monitoring system

Abstract

The present application relates to the technical field of tunnel monitoring, in particular to a tunnel surrounding rock monitoring system, comprising target points, a central processing module and a tunnel surrounding rock monitoring device, the monitoring device comprising: a shell, the shell comprising a mounting area and a transparent area; a servo motor, horizontally arranged in the mounting area, and the rotating rod of the servo motor extending into the transparent area at one end; a turntable, vertically arranged in the transparent area, the rotating rod being used to drive the turntable to rotate, a distance measuring sensor being arranged at the center of the side of the turntable away from the rotating rod, and a plurality of target points being arranged around the tunnel in a spaced manner; the central processing module being used to control the rotation angle of the servo motor; the distance measuring sensor being used to collect distance information of each target point; and the surrounding rock deformation of the tunnel being analyzed according to the distance information of each target point collected multiple times. The central processing module controls the rotation angle of the servo motor and the data collection of the distance measuring sensor, realizes the automatic and centralized collection of multi-target point data, does not need manual intervention, and improves the monitoring efficiency.

Description

Technical Field

[0001] This invention relates to the field of tunnel monitoring technology, and in particular to a tunnel surrounding rock monitoring system. Background Technology

[0002] With rapid economic and social development and the country's vigorous promotion of urbanization, the construction of basic transportation infrastructure such as highways, railways, subways, and undersea tunnels in my country has accelerated, resulting in an ever-growing total mileage of roads under construction and operation. In the construction of various types of roads, tunnels are a frequently used and effective construction method to reduce environmental impact. However, with the increasing mileage of tunnels, tunnel safety issues have become increasingly prominent. Once the surrounding rock of a tunnel deforms and collapses, it not only significantly increases the cost of tunnel maintenance but also endangers the safety of passing vehicles and personnel.

[0003] Modern tunnel monitoring systems involve professional monitoring personnel entering the tunnel with traditional surveying tools such as total stations, levels, and measuring ropes to collect data at pre-set monitoring points. By measuring parameters such as displacement and settlement of the tunnel's surrounding rock surface, the personnel record the data, manually compile it into reports, and then analyze the data to determine the stability of the surrounding rock.

[0004] However, manual monitoring requires monitoring personnel to measure each monitoring point in the tunnel, which often takes a lot of time and seriously affects the tunnel construction progress. In addition, the tunnel construction environment is complex and there are many safety hazards such as collapse, rockfall, and leakage of harmful gases. When monitoring personnel work in the tunnel, they are directly exposed to these dangerous environments, and their personal safety cannot be fully guaranteed. Summary of the Invention

[0005] The purpose of this invention is to provide a tunnel surrounding rock monitoring system, addressing the problems existing in the prior art of tunnel monitoring by inspection personnel.

[0006] This invention provides a tunnel surrounding rock monitoring system, including a target point, a central processing module, and a tunnel surrounding rock monitoring device, wherein the tunnel surrounding rock monitoring device includes:

[0007] A housing, the housing including a mounting area and a transparent area;

[0008] A servo motor is horizontally positioned within the mounting area, with one end of the servo motor's rotating rod extending into the transparent area.

[0009] A turntable is vertically arranged within the transparent area. The rotating rod is used to drive the turntable to rotate. A distance measuring sensor is provided at the center of the side of the turntable away from the rotating rod.

[0010] Multiple target points are arranged at intervals around the tunnel circumference;

[0011] The central processing module is used to control the rotation angle of the servo motor.

[0012] And, control the ranging sensor to collect distance information for each of the target points;

[0013] Furthermore, the deformation of the surrounding rock of the tunnel is analyzed based on the distance information of each target point collected multiple times.

[0014] Preferably, it also includes a motor driver located in the mounting area, the motor driver being connected to the servo motor.

[0015] Preferably, a sleeve is provided at the center of the turntable near the servo motor, and the sleeve is mounted on the rotating rod.

[0016] Preferably, the sleeve is fitted onto the rotating rod, and the sleeve is provided with a threaded hole;

[0017] It also includes a fastening bolt, one end of which passes through the threaded hole and abuts against the rotating rod.

[0018] Preferably, the central processing module is used to form a displacement sequence corresponding to each target point based on the distance information of each target point collected multiple times, and to determine the degree of deformation of the surrounding rock according to the deviation of the displacement sequence.

[0019] Preferably, the central processing module is further configured to analyze the positional deviation of each target point based on the distance information of each target point collected multiple times.

[0020] Preferably, the central processing module is used to sequentially name the multiple target points as point a, point b, point c, point d, point e, point f, point g, point h, and point i, and take the distance between point d and point e as the first distance d1, the distance between point c and point f as the second distance d2, the distance between point b and point g as the third distance d3, the distance between point a and point h as the fourth distance d4, and the distance between the monitoring device and point i as the fifth distance d5;

[0021] The distance information of each target point collected multiple times is then incorporated into the first distance d1, the second distance d2, the third distance d3, the fourth distance d4, and the fifth distance d5. By analyzing the deviation of the first distance d1, the second distance d2, the third distance d3, the fourth distance d4, and the fifth distance d5 at different time periods, the positional deviation of the target point related to each distance is obtained.

[0022] Preferably, the rotation angle is the same as the angle between adjacent target points.

[0023] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0024] 1. The monitoring device of the present invention has a servo motor horizontally positioned to drive the turntable to rotate, which in turn drives the ranging sensor to rotate around the center of the turntable. This allows for flexible adjustment of the ranging sensor's monitoring angle, enabling the ranging sensor on the turntable to perform circumferential monitoring of the tunnel. This facilitates tunnel cross-section detection and avoids the problems of low efficiency and safety risks associated with traditional tunnel rock monitoring by professional monitoring personnel. Furthermore, the outer shell is divided into an installation area and a transparent area, allowing for separate installation of the servo motor and the ranging sensor. The outer shell protects the internal components, achieving waterproof and dustproof effects, while the transparent area facilitates external monitoring by the ranging sensor, preventing the outer shell from obstructing data acquisition.

[0025] 2. The monitoring system of this invention deploys multiple target points at intervals around the tunnel circumference. Combined with rotatable monitoring equipment, a single monitoring device can collect data from multiple target points, significantly reducing the number of devices deployed and lowering system construction costs. Furthermore, the central processing module controls the rotation angle of the servo motor and the distance sensor for data collection, achieving automated and centralized data acquisition from multiple target points without manual intervention, improving monitoring efficiency and avoiding human error. Moreover, the central processing module analyzes the distance information of the target points collected multiple times to determine the deformation of the tunnel surrounding rock, providing engineers with a comprehensive assessment of the surrounding rock stability and improving the timeliness and accuracy of risk warnings. Attached Figure Description

[0026] Figure 1 This is a front view of the monitoring equipment.

[0027] Figure 2 This is a right-side view of the testing equipment.

[0028] Figure 3 This is a schematic diagram of the monitoring system. Figure 1 .

[0029] Figure 4 This is a schematic diagram of the monitoring system. Figure 2 .

[0030] Figure 5 This is a schematic diagram showing the connection between the servo motor and the turntable.

[0031] Figure 6 This is a system diagram showing the central processing module, ranging sensor, and motor driver.

[0032] Markings in the image:

[0033] 1-Outer shell,

[0034] 11-Installation area, 12-Transparent area

[0035] 2-Servo motors

[0036] 21-Rotating rod,

[0037] 3-Turntable,

[0038] 4-Distance sensor,

[0039] 5-Motor driver,

[0040] 6-Sleeve,

[0041] 7-Fastening bolts,

[0042] 10-Tunnel,

[0043] 20-target points

[0044] 100 - Central Processing Module. Detailed Implementation

[0045] The present invention will now be described in further detail with reference to specific embodiments. However, this should not be construed as limiting the scope of the present invention to the following embodiments; all technologies implemented based on the content of the present invention fall within the scope of the present invention.

[0046] Unless otherwise specified, the use of terms such as "upper," "lower," "left," "right," "center," "inner," and "outer" to indicate orientation or positional relationships in the description of specific embodiments of the present invention is based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationship in which the product / equipment / device is typically placed during use. These terms are merely for the purpose of facilitating the description of the present invention or simplifying the description in specific embodiments, enabling those skilled in the art to quickly understand the solution, and do not indicate or imply that a particular device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship. Therefore, they should not be construed as limitations on the present invention.

[0047] Furthermore, the use of terms such as "horizontal," "vertical," "suspended," "parallel," and "coaxial" does not imply that the corresponding device / component / element must be absolutely horizontal, vertical, suspended, parallel, or coaxial. Slight tilt or deviation is permissible, as long as it does not affect the normal function of the relevant component. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," not that the structure must be perfectly horizontal; a slight tilt is acceptable. "Coaxial" means that two components are set as coaxially as possible, allowing them to move coaxially or approximately coaxially when their relative positions change. Alternatively, it can be simplified to mean that the corresponding device / component / element, when set in a "horizontal," "vertical," "suspended," "parallel," or "coaxial" direction, can have an error / deviation of ±10% relative to the corresponding direction, more preferably within ±8%, more preferably within ±6%, more preferably within ±5%, and more preferably within ±4%. For example, the deviation in the "coaxial" direction is controlled within 0.2-1mm, preferably within 0.2-0.5mm. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its function in the solution of the present invention.

[0048] Furthermore, the use of terms such as "first," "second," and "third" in terminology is merely for distinguishing descriptions of identical or similar components and should not be interpreted as emphasizing or implying the relative importance of a particular component.

[0049] Furthermore, in the description of the embodiments of the present invention, "several", "more than", and "a number of" represent at least two. The number can be any number, such as 2, 3, 4, 5, 6, 7, 8, or 9, and can even exceed nine.

[0050] Furthermore, in the description of the technical solution of this invention, unless otherwise explicitly specified / limited / restricted, the terms "set up," "install," "connect," "link," "provided with," "laid out," and "arranged" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to common connection methods in the art, such as welding, riveting, bolting, and threaded connections. Such connections can be mechanical, electrical, or communication connections; they can be direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components.

[0051] Example 1

[0052] like Figures 1-2 As shown, this embodiment discloses a tunnel surrounding rock monitoring device, including:

[0053] Housing 1, housing 1 includes mounting area 11 and transparent area 12;

[0054] Servo motor 2 is horizontally set in the mounting area 11, and one end of the rotating rod 21 of servo motor 2 extends into the transparent area 12;

[0055] Turntable 3 is vertically set in transparent area 12. Rotating rod 21 is used to drive turntable 3 to rotate. Distance sensor 4 is provided at the center of the side of turntable 3 away from rotating rod 21.

[0056] The servo motor 2 is horizontally positioned and drives the turntable 3 to rotate, causing the ranging sensor 4 to rotate around the center of the turntable 3. This allows for flexible adjustment of the monitoring angle of the ranging sensor 4, enabling the ranging sensor 4 on the turntable 3 to perform circumferential monitoring of the tunnel 10. This facilitates the detection of the tunnel 10 cross-section, avoiding the low efficiency and safety risks associated with traditional tunnel rock monitoring by professional monitoring personnel. Furthermore, the outer shell 1 is divided into an installation area 11 and a transparent area 12, allowing for the partitioned installation of the servo motor 2 and the ranging sensor 4. The outer shell 1 protects the internal components, achieving waterproof and dustproof effects, while the transparent area 12 facilitates external monitoring by the ranging sensor 4, preventing the outer shell 1 from obstructing data acquisition.

[0057] In this embodiment, the ranging sensor 4 is installed at the center of the turntable 3 on the side away from the rotating rod 21, ensuring that the ranging sensor 4 maintains a relatively stable monitoring posture during the rotation of the turntable 3, reducing the impact of vibration caused by rotation on the accuracy of data acquisition, and improving the accuracy of monitoring data.

[0058] Furthermore, the tunnel surrounding rock monitoring equipment of this embodiment can cover multiple monitoring points around the tunnel without deploying multiple devices.

[0059] In this embodiment, the ranging sensor 4 is a laser ranging sensor. During measurement, multiple target points 20 are arranged at intervals along the circumference of the tunnel 10. The target points 20 are reflective sheet type target points. The target point 20 consists of a support plate and a reflective layer. The support plate is generally an aluminum alloy plate or a stainless steel plate. The reflective layer is a high refractive index glass microsphere reflective film layer or an aluminum-coated prism type reflective film layer. The reflective layer is laid on the support plate. The support plate is installed on the surrounding rock of the tunnel 10 by pre-embedded bolts.

[0060] The laser rangefinder calculates distance by emitting a laser beam and receiving the reflected signal. Specifically, the laser rangefinder emits a laser beam toward the target point 20, and the target point 20 reflects the laser beam back along the original optical path. The laser rangefinder calculates the distance between the laser rangefinder and the corresponding target point 20 based on the time difference between emitting and receiving the beam.

[0061] In this embodiment, the shell material of the transparent area 12 is quartz glass or borosilicate glass, which have good light transmittance and are resistant to extreme temperatures.

[0062] In one or more implementations, such as Figure 1 , Figure 2 As shown, it also includes a motor driver 5 located in the mounting area 11, which is connected to the servo motor 2.

[0063] The rotation angle and speed of the servo motor 2 are controlled by the motor driver 5, ensuring that the ranging sensor 4 can quickly and accurately align with the monitoring target points 20 around the tunnel 10, thereby improving monitoring efficiency and positioning accuracy.

[0064] Specifically, during the monitoring process, the motor driver 5 sends pulse signals to the servo motor 2, thereby controlling the rotation rod 21 in the servo motor 2 to rotate at a precise angle, such as... Figure 3 As shown, nine target points 20 are marked at 0° to 90° on the surrounding rock of tunnel 10, namely a, b, c, d, e, f, g, h, and i. Each target point 20 is 10° apart. The absolute encoder in the motor driver 5 accurately records the position of these nine target points 20, thereby controlling the servo motor 2 to drive the distance sensor 4 located on the turntable 3 to rotate at a precise angle, so that the distance sensor 4 can accurately locate the nine target points 20 on the surrounding rock of the tunnel and perform repeated measurement scans and record the distance information data of each target point 20.

[0065] In optional implementations, such as Figure 1 , Figure 2 As shown, a sleeve 6 is provided at the center of the turntable 3 near the servo motor 2, and the sleeve 6 is mounted on the rotating rod 21.

[0066] A sleeve 6 is installed at the center of the turntable 3 near the servo motor 2. The sleeve 6 and the rotating rod 21 are connected coaxially to ensure that the turntable 3 and the rotating rod 21 rotate synchronously, effectively reducing the eccentricity and shaking of the turntable 3 when it rotates.

[0067] In optional implementations, such as Figure 5 As shown, the sleeve 6 is fitted onto the rotating rod 21, and the sleeve 6 is provided with a threaded hole;

[0068] It also includes a fastening bolt 7, one end of which passes through a threaded hole and abuts against the rotating rod 21.

[0069] The sleeve 6 is provided with a threaded hole for use with a fastening bolt 7. The fastening bolt 7 passes through the threaded hole and abuts against the rotating rod 21, which can firmly fix the sleeve 6 and the rotating rod 21, effectively preventing them from sliding or rotating relative to each other, ensuring that the turntable 3 and the rotating rod 21 always maintain coaxial rotation, and ensuring the monitoring stability of the ranging sensor. At the same time, the detachable fastening bolt 7 design facilitates equipment maintenance and component replacement, improving the ease of use of the equipment.

[0070] Example 2

[0071] like Figures 1-6 As shown, this embodiment discloses a tunnel surrounding rock monitoring system, including a target point 20, a central processing module 100, and a tunnel surrounding rock monitoring device as described in Embodiment 1;

[0072] Multiple target points are arranged at 20 circumferential intervals around the tunnel;

[0073] The central processing module 100 is used to control the rotation angle of the servo motor 2;

[0074] In addition, the range sensor 4 is controlled to collect distance information for each target point 20;

[0075] Furthermore, the deformation of the surrounding rock of tunnel 10 is analyzed based on the distance information of each target point 20 collected multiple times.

[0076] Multiple target points 20 are arranged at intervals around the tunnel 10. Combined with rotatable monitoring equipment, a single monitoring device can collect data from multiple target points 20, which greatly reduces the number of devices and lowers the system construction cost. Furthermore, the central processing module 100 controls the rotation angle of the servo motor 2 and the distance sensor 4 to collect data, realizing the automated and centralized collection of multi-target data without manual intervention, improving monitoring efficiency and avoiding human operation errors.

[0077] Furthermore, the central processing module 100 analyzes the target distance information collected multiple times to determine the deformation of the surrounding rock in the tunnel, providing engineers with a comprehensive basis for assessing the stability of the surrounding rock and improving the timeliness and accuracy of risk warnings.

[0078] In this implementation, the target distance information refers to the distance from each target point 20 to the ranging sensor 4.

[0079] In this implementation, the rotation angle and speed of the servo motor 2 are controlled by the motor driver 5 to ensure that the ranging sensor 4 can quickly and accurately align with the monitoring target points 20 around the tunnel 10, thereby improving monitoring efficiency and positioning accuracy.

[0080] The central processing module 100 is wirelessly connected to the motor driver 5, thereby controlling the rotation angle of the servo motor 2 so that the rotation angle of the servo motor 2 is the same as the angle between adjacent target points.

[0081] In an optional implementation, the central processing module 100 is used to form a displacement sequence corresponding to each target point 20 based on the distance information of each target point 20 collected multiple times, and to determine the degree of deformation of the surrounding rock based on the deviation of the displacement sequence.

[0082] The central processing module 100 generates a displacement sequence based on the target point distance information collected multiple times. By analyzing the deviation of the displacement sequence, the degree of deformation of the surrounding rock area corresponding to each target point can be quantitatively determined. For example, the magnitude of the displacement sequence deviation can be used to distinguish between slight deformation, moderate deformation and severe deformation. The quantitative analysis results can provide engineers with a more intuitive and accurate basis for assessing the stability of the surrounding rock, which is convenient for developing targeted reinforcement and protection measures.

[0083] The target distance information collected in the first collection is taken as the initial value, and the target distance information collected in each subsequent collection is taken as the change value. The standard deviation between the change value collected in each collection and the initial value is calculated. After collecting the target distance information multiple times, multiple sets of standard deviation values ​​are formed. These multiple sets of standard deviation values ​​are the deviation of the displacement sequence, which is used to determine the degree of dispersion of each target distance information, thereby obtaining the surrounding rock deformation of tunnel 10.

[0084] In an optional implementation, the central processing module 100 is also used to analyze the positional deviation of each target point 20 based on the distance information of each target point 20 collected multiple times.

[0085] Based on the analysis of the degree of deformation, the central processing module 100 further analyzes the positional deviation of each target point 20 to clarify the differences in the deformation of the surrounding rock in different areas of the tunnel circumference.

[0086] For example, if the positional deviation of a certain target point is significantly greater than that of other target points, it indicates that there may be a risk of local deformation in the surrounding rock area corresponding to that target point. Engineers can prioritize inspection and reinforcement work in this area to improve the pertinence and efficiency of risk management.

[0087] Specifically, such as Figure 4 As shown, the central processing module 100 is used to name the multiple target points 20 sequentially as point a, point b, point c, point d, point e, point f, point g, point h, and point i, and take the distance between point d and point e as the first distance d1, the distance between point c and point f as the second distance d2, the distance between point b and point g as the third distance d3, the distance between point a and point h as the fourth distance d4, and the distance between the monitoring device and point i as the fifth distance d5;

[0088] The distance information of each target point 20 collected multiple times is then incorporated into the first distance d1, the second distance d2, the third distance d3, the fourth distance d4, and the fifth distance d5. By analyzing the length deviation of the first distance d1, the second distance d2, the third distance d3, the fourth distance d4, and the fifth distance d5 at different time periods, the position deviation of the target point 20 related to each distance is obtained.

[0089] Specifically, nine target points 20 are marked at 0° to 90° around the surrounding rock of tunnel 10, namely a, b, c, d, e, f, g, h, and i.

[0090] The angle between adjacent target points 20 is 10°.

[0091] When calculating the distance between two target points 20, taking the second distance d2 as an example: the distance between point c and the distance sensor 4 is measured by the distance sensor 4 as the first length, and the distance between point f and the distance sensor 4 is measured as the second length. Given the angle between points c and f, the distance between the line connecting points c and f can be calculated using trigonometric functions, that is, the second distance d2 can be calculated.

[0092] The central processing module 100 names the target points 20 in an orderly manner and defines the distances (d1-d5) between multiple groups of target points, and establishes a correlation analysis model between multiple target points;

[0093] By comparing the length deviations of different distances at different time periods, the overall positional deviation of the two target points 20 related to the distance can be determined.

[0094] Taking the second distance d2 (the distance between points c and f) as an example, the first second distance d2 is taken as the initial value, and the second distance d2 measured and calculated in subsequent measurements is the change value. The absolute value of the difference between the two is the deviation. When the deviation increases, it indicates that there may be overall compression or tensile deformation in the surrounding rock area where points c and f are located.

[0095] Multi-target correlation analysis can comprehensively present the overall trend of tunnel surrounding rock deformation, promptly detect potential large-scale deformation risks, provide reliable data support for engineers to formulate overall protection strategies, and improve the comprehensiveness of the monitoring system's assessment of surrounding rock stability.

[0096] In an optional implementation, the rotation angle is the same as the angle between adjacent target points.

[0097] The servo motor 2 rotates at the same angle as the adjacent target points 20, so that the ranging sensor 4 can be accurately aligned with each target point without repeated adjustments, which greatly improves the positioning efficiency of the target points 20. At the same time, the fixed-angle rotation avoids the missed or false detection of target points 20 due to angle deviation, ensuring that the distance information of each target point can be accurately collected, and improving the integrity and accuracy of the monitoring data.

[0098] In this embodiment, the central processing module 100 includes a ranging sensor control unit, a data storage unit, a data analysis unit, a servo motor control unit, a main control unit, etc.

[0099] The ranging sensor control unit is wirelessly connected to the ranging sensor 4 and is used to control the distance information of each target point 20 collected by the ranging sensor 4;

[0100] The data storage unit is used to store the distance information of each target point 20 collected by the ranging sensor 4;

[0101] The data analysis unit is used to analyze the displacement of each target point 20 based on the distance information of each target point 20 collected multiple times, form a corresponding displacement sequence, and determine the degree of surrounding rock deformation based on the deviation of the displacement sequence.

[0102] Furthermore, the positional deviation of each target point 20 is analyzed based on the distance information of each target point 20 collected multiple times;

[0103] The servo motor control unit is wirelessly connected to the motor driver 5 to control the start and stop of the servo motor 2 and its rotation angle;

[0104] The main control unit is connected to each of the above units, coordinates all the units, and schedules them according to preset logic to realize the entire process of motor rotation → sensor acquisition → data storage → analysis and judgment, ensuring that the functions of each unit are executed in an orderly manner.

[0105] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A system for monitoring surrounding rock of a tunnel, characterized in that The tunnel surrounding rock monitoring device comprises a target point (20), a central processing module (100) and a tunnel surrounding rock monitoring device, and the tunnel surrounding rock monitoring device comprises: A shell (1) comprising a mounting area (11) and a transparent area (12); A servo motor (2) horizontally arranged in the mounting area (11), and a rotating rod (21) of the servo motor (2) extending into the transparent area (12); A turntable (3) vertically arranged in the transparent area (12), the rotating rod (21) being used to drive the turntable (3) to rotate, and a distance measuring sensor (4) being arranged at the center of the side of the turntable (3) away from the rotating rod (21); A plurality of target points (20) are arranged around the tunnel (10) in a circumferential direction; The central processing module (100) is used to control the rotating angle of the servo motor (2); And control the distance information of each target point (20) collected by the distance measuring sensor (4); And analyze the surrounding rock deformation of the tunnel (10) according to the distance information of each target point (20) collected multiple times; The central processing module (100) is used to form a displacement sequence corresponding to each target point (20) based on the distance information of each target point (20) collected multiple times, and determine the surrounding rock deformation degree according to the deviation amount of the displacement sequence; Wherein, the distance information of the target point collected for the first time is taken as the initial value, and the distance information of the target point collected each time thereafter is taken as the change value, the standard deviation of the change value and the initial value collected each time is calculated, a plurality of standard deviation values are formed after the distance information of the target point is collected multiple times, the plurality of standard deviation values are the deviation amount of the displacement sequence, the dispersion degree of each target point distance information is determined, and thus the surrounding rock deformation of the tunnel (10) is obtained; The central processing module (100) is also used to analyze the position deviation of each target point (20) based on the distance information of each target point (20) collected multiple times; The central processing module (100) is used to sequentially name the plurality of target points (20) as a point, b point, c point, d point, e point, f point, g point, h point, i point, take the distance between the d point and the e point as a first distance d1, take the distance between the c point and the f point as a second distance d2, take the distance between the b point and the g point as a third distance d3, take the distance between the a point and the h point as a fourth distance d4, and take the distance between the monitoring device and the i point as a fifth distance d5; And the distance information of each target point (20) collected multiple times is brought into the first distance d1, the second distance d2, the third distance d3, the fourth distance d4 and the fifth distance d5, the deviation amount of the first distance d1, the second distance d2, the third distance d3, the fourth distance d4 and the fifth distance d5 in different time periods is analyzed, and the position deviation of each distance-related target point (20) is obtained.

2. The tunnel surrounding rock monitoring system according to claim 1, characterized in that, Further comprising a motor driver (5) located in the mounting area (11), and the motor driver (5) is connected with the servo motor (2).

3. The tunnel surrounding rock monitoring system according to claim 1, characterized in that, The rotating disc (3) is provided with a sleeve (6) near the center of one side of the servo motor (2), and the sleeve (6) is installed on the rotating rod (21).

4. The tunnel surrounding rock monitoring system according to claim 3, characterized in that, The sleeve (6) is sleeved on the rotating rod (21), and the sleeve (6) is provided with a threaded hole; Further comprising a fastening bolt (7), one end of the fastening bolt (7) penetrates through the threaded hole and abuts against the rotating rod (21).

5. The tunnel surrounding rock monitoring system according to claim 1, characterized in that, The rotating angle is the same as the angle between adjacent target points.

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