Comprehensive analysis method for abrasion of shield cutter in complex stratum

Abstract

The invention discloses a comprehensive analysis method for wear of a shield cutter in a complex stratum. The comprehensive analysis method comprises the following steps: S1, analyzing the change of shield tunneling parameters; s2, analyzing the tunneling distance of each cutter; and S3, comprehensively analyzing results obtained in the step S1 and the step S2 to judge the abrasion state of each cutter on the cutter head, and timely determining and replacing the abraded cutter on the cutter head. According to the method, three modes of reflecting the working states of the cutter at different positions through shield tunneling parameter changes, predicting the tunneling distance of the cutter after each time of cutter replacement and predicting the tunneling distance of the cutter in use in real time serve as judgment bases, so that a technical means is provided for researching the abrasion of the shield cutter in the complex stratum; cutter measurement difficulty and observation errors existing in actual shield engineering are avoided, and meanwhile, complex stratum shield cutter abrasion characteristic analysis is more sufficient and perfect.

Description

Technical Field

[0001] The present invention belongs to the technical field of shield tunnel construction, and particularly relates to a comprehensive analysis method for the wear of shield cutters in complex strata. Background Art

[0002] In recent years, with the continuous advancement of the national development strategy and infrastructure construction, and the further improvement of the high-speed railway network, highway network, and urban road network structures, shield tunnel projects have been widely applied. Among them, due to the high space utilization rate of large-diameter shield tunnels and super-large-diameter shield tunnels, they have been widely used in tunnel projects such as crossing rivers and seas. The construction of long-distance, large-section, and complex strata has gradually become the mainstream trend of shield tunnel construction. Shield construction realizes tunneling by rotating the cutterhead of the shield machine and cutting the rock and soil mass of the working face with the cutters. Large-diameter shield machines will encounter various complex strata during long-distance tunneling, and the cutterhead and cutters of the shield machine are extremely prone to wear during the cutting of the above complex strata.

[0003] As the key tunneling device of the shield, the wear condition of the shield cutter is crucial for the shield construction efficiency, construction quality, and construction safety. When the cutter wears to a certain extent or abnormal wear occurs, it will not only reduce the tunneling efficiency but also increase the project risks and costs. Therefore, it is particularly important to analyze the cutter wear law and establish a study on the prediction of wear amount. Currently, there is no unified and effective technical means and analysis method. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide a brand-new comprehensive analysis method for the wear of shield cutters in complex strata.

[0005] To solve the above technical problem, the technical solution adopted by the present invention is as follows:

[0006] A comprehensive analysis method for the wear of shield cutters in complex strata, which includes the following steps:

[0007] S1. Analyze the change of shield tunneling parameters

[0008] Real-time monitor the shield tunneling parameters, and establish a mathematical model that can reflect the working state of the cutterhead and cutters at different positions as the basis for judging the occurrence of abnormal wear of the cutters;

[0009] S2. Analyze the available tunneling distance of each cutter

[0010] a) Real-time monitor the rotation values of the cutters at each position on the cutterhead, analyze the change law of the rotation values of the cutters at each position on the cutterhead after each cutter change, and predict the available tunneling distance of the cutters at each position on the cutterhead after each cutter change according to the change law of the cutter rotation values;

[0011] b) Determine the wear limits of the cutters at various positions on the cutter head, calculate the unit wear of the cutters based on the actual tunneling distance and the actual wear amount of each cutter, and analyze and predict the remaining tunneling distance of each cutter in real time;

[0012] S3. Comprehensively analyze the results obtained in steps S1 and S2 to judge the wear status of each cutter on the cutter head, and promptly identify and replace the worn cutters on the cutter head.

[0013] According to a specific implementation and preferred aspect of the present invention, in step S1, the total thrust, cutter head torque, and penetration of the cutter head in the shield are monitored in real time, and the established mathematical model is

[0014] P = N / G...(1);

[0015] Q = F / G...(2);

[0016] In equations (1) and (2), N is the cutter head torque, G is the penetration, and F is the total thrust; summarize the P values and Q values obtained from equations (1) and (2), and reflect the wear status of each cutter through the changes in the P values and Q values. Here, by defining the parameters P and Q, the amplification effect on the cutter wear signal of the cutter head is realized, which can more intuitively and simply reflect the cutter wear status, effectively simplify the analysis process, and improve the analysis efficiency and the accuracy of the analysis results.

[0017] Preferably, taking the actual tunneling distance of the shield as the abscissa and the P values and Q values as the ordinates, respectively plot the change trend diagrams of the P values and Q values, and determine the abnormal P values and Q values according to the change trend diagrams.

[0018] Preferably, when the P values and Q values are abnormal, check each cutter step by step according to the wear-prone degree of the cutters at various positions on the cutter head. After replacing the cutter, compare the changes in the P values and Q values before and after replacing the cutter to determine that the wear problem has been eliminated.

[0019] According to another specific implementation and preferred aspect of the present invention, in step a) of S2, define the minimum rotation value based on the change trend of the cutter rotation value before replacement, and predict the remaining tunneling distance of the cutter after replacement based on the tunneling distance when the cutter rotation value before replacement drops to the minimum rotation value. Here, predict the service life of the cutter after tool replacement based on the wear status of the previous cutter, providing a judgment basis for cutter wear analysis; at the same time, form a comparison of the minimum rotation values of the cutters in multiple tool replacements to facilitate the monitoring of the stability of the cutters during continuous tunneling.

[0020] Preferably, when the rotational value of the tool before replacement drops and fluctuates within a certain range, it is determined that the tool is in a state of uniform wear and needs to be replaced, and the defined minimum rotational value is greater than the rotational value of the tool within this range. Here, once the cutter head wears, it is an irreversible process and cannot be repaired. Therefore, in order to avoid wear of the cutter head and reduce losses, by defining the minimum rotational value, it is ensured that tools reaching the wear limit can be discovered and replaced in advance.

[0021] According to another specific implementation and preferred aspect of the present invention, in step b) of S2, the calculation formula for the predicted tunneling distance of each tool is:

[0022] δ = M / L...(3);

[0023] Ly = Mx / δ...(4);

[0024] In formulas (3) and (4), δ is the unit wear amount of the tool, M is the actual wear amount of the tool, L is the actual tunneling distance of the tool, Ly is the predicted tunneling distance of the tool, and Mx is the wear limit of the tool.

[0025] Preferably, the predicted unit wear amount of the tool is defined based on the unit wear amount of the tool before replacement, and the unit wear amount of the tool after replacement is compared with the predicted unit wear amount of the tool to determine whether the tool has abnormal wear. Here, by judging the stability of the tool wear change through the change of the unit wear amount of the tool, it can accurately reflect whether the wear state of the tool is normal.

[0026] Preferably, in step b) of S2, the wear amount of the tool is measured manually.

[0027] In addition, when manually measuring the wear amount of the tool, a three-dimensional laser scanning device is used to perform a full-section scan on the worn tool to obtain a three-dimensional digital model, and the wear type and wear degree of the tool are analyzed and judged based on the three-dimensional digital model.

[0028] Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0029] In the prior art, as a key tunneling device of a shield machine, the wear condition of shield cutters is crucial for the construction efficiency, quality, and safety of shield tunneling. When the cutters are worn to a certain extent or abnormal wear occurs, it will not only reduce the tunneling efficiency but also increase engineering risks and costs. Therefore, it is particularly important to analyze the wear law of cutters and establish a study on wear amount prediction. Currently, there is no unified and effective technical means and analysis method. This application conducts an overall design on the comprehensive analysis method for the wear of shield cutters in complex strata, skillfully solving the deficiencies and defects of the prior art. After adopting this comprehensive analysis method, by monitoring the shield tunneling parameters, a mathematical model that can reflect the working states of the cutter head cutters at different positions is established as the basis for judging abnormal wear of the cutters. By real-time monitoring the rotation values of the cutters at each position on the cutter head, analyzing the change law of the rotation values of the cutters at each position on the cutter head after each cutter change, and based on the change law of the cutter rotation values, predicting the tunneling distance that the cutters at each position on the cutter head can achieve after each cutter change. By determining the wear limit values of the cutters at each position on the cutter head and calculating the unit wear amount of the cutters based on the actual tunneling distance and the actual wear amount generated by each cutter, analyzing and predicting in real-time the tunneling distance that each cutter can achieve. And taking the results obtained by the three methods of the change of the working states of the cutters at different positions, predicting the tunneling distance of the cutters after each cutter change, and real-time predicting the tunneling distance of the cutters during use as the judgment basis and conducting comprehensive analysis to determine the wear states of the cutters on the cutter head, and being able to timely determine and replace the worn cutters on the cutter head. Therefore, compared with the prior art, the present invention provides a technical means for studying the wear of shield cutters in complex strata based on three ways of reflecting the working states of the cutters at different positions through the change of shield tunneling parameters, predicting the tunneling distance of the cutters after each cutter change, and real-time predicting the tunneling distance of the cutters during use, avoiding the difficulty of cutter measurement and observation error in actual shield engineering, and at the same time making the analysis of the wear characteristics of shield cutters in complex strata more sufficient and perfect. Detailed Embodiments

[0030] To make the above objects, features, and advantages of the present invention more obvious and understandable, the present invention will be described in detail below in conjunction with specific embodiments. Many specific details are set forth in the following description in order to fully understand the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0032] In addition, the terms "first" and "second" are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0033] In the present invention, unless otherwise clearly specified and defined, terms such as "installed", "connected", "joined", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly defined. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath", and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0035] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it may be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "up", "down", "left", "right", and similar expressions used herein are for illustrative purposes only and do not represent the only implementation.

[0036] The comprehensive analysis method for shield cutter wear in complex strata involved in this embodiment includes the following steps:

[0037] S1. Analyze the changes in shield tunneling parameters

[0038] Monitor the shield tunneling parameters in real time and establish a mathematical model that can reflect the working states of the cutter head cutters at different positions as the basis for judging abnormal wear of the cutters.

[0039] In some specific embodiments, the total thrust, cutter head torque, and penetration of the cutter head in the shield are monitored in real time, and the established mathematical model is

[0040] P = N / G...(1);

[0041] Q = F / G...(2);

[0042] In equations (1) and (2), N is the cutter head torque, G is the penetration rate, and F is the total thrust; the P values and Q values obtained by summarizing equations (1) and (2) are used to reflect the wear state of each cutter through the changes in the P values and Q values. Here, by defining the parameter P values and Q values, the amplification effect of the cutter wear signal of the cutter head is realized, which can more intuitively and simply reflect the cutter wear state, effectively simplify the analysis process, and improve the analysis efficiency and the accuracy of the analysis results.

[0043] At the same time, taking the actual tunneling distance of the shield as the abscissa, and the P values and Q values as the ordinates, the change trend diagrams of the P values and Q values are respectively drawn. According to the change trend diagrams, the abnormal P values and Q values are determined. And when the P values and Q values are abnormal, each cutter is gradually inspected according to the wear-prone degree of the cutters at each position on the cutter head. After replacing the cutter, the changes in the P values and Q values before and after replacing the cutter are compared to determine that the wear problem is eliminated.

[0044] Taking the tunneling parameters before and after a certain cutter replacement as an example, before cutter replacement, the penetration rate was 7 mm / r, the cutter head torque was 13.72 MN·m, and the total thrust was 95027 KN; after cutter replacement, the penetration rate was 10 mm / r, the cutter head torque was 6.14 MN·m, and the total thrust was 97234 KN. By analyzing the parameters before and after cutter replacement, the penetration rate increased by 30%, the cutter head torque decreased by 55%, and the total thrust increased by 2.27%. Therefore, the P value before cutter replacement was 1.96, and the Q value was 13575.29; the P value after cutter replacement was 0.61, and the Q value was 9723.4. By analyzing the parameters before and after cutter replacement, the P value decreased by 68.9%, and the Q value decreased by 28.4%. It can be determined that the judgment of cutter wear and the treatment measures are correct, effectively eliminating the adverse effects of cutter wear.

[0045] S2. Analyze the available tunneling distance of each cutter

[0046] a) Monitor the rotation values of the cutters at each position on the cutter head in real time, analyze the change rules of the rotation values of the cutters at each position on the cutter head after each cutter replacement, and predict the available tunneling distance of the cutters at each position on the cutter head after each cutter replacement according to the change rules of the cutter rotation values;

[0047] For the convenience of implementation, in this embodiment, a disc cutter rotation monitoring system (DCRM) is used. By installing a pulse generator in the hub of the disc cutter, the rolling condition and temperature of the disc cutter are continuously monitored and displayed on the controller in the form of a rolling track line, facilitating the timely monitoring of its rolling cutting condition.

[0048] Meanwhile, a minimum rotation value is defined based on the change trend of the tool rotation value before replacement, and the tunneling distance when the tool rotation value before replacement drops to the minimum rotation value is used as the basis to predict the tunneling distance that the tool can achieve after replacement. Herein, the service life of the tool after tool replacement is predicted based on the wear state of the previous tool, providing a basis for judgment in tool wear analysis; meanwhile, a comparison of the minimum rotation values of the tools is formed during multiple tool replacements to facilitate the monitoring of the stability of the tools during continuous tunneling.

[0049] When the tool rotation value before replacement drops to fluctuate up and down within a certain range, it is determined that the tool is in a state of uniform wear and needs to be replaced, and the defined minimum rotation value is greater than the tool rotation value within this range. Herein, once the cutter head is worn, it is an irreversible process and cannot be repaired. Therefore, in order to avoid wear of the cutter head and reduce losses, by defining the minimum rotation value, it is ensured that tools reaching the wear limit can be discovered and replaced in advance.

[0050] Taking the tool on the 46th track of the cutter head (the tool number is a conventional measure) as an example, the tool replacement position of this tool is at the 410th ring (in this embodiment, the tunneling distance is indicated by the tunneling ring number). The rotation value before tool replacement is 51 rpm - 58 rpm, and the rotation value after tool replacement is 138 rpm - 141 rpm. The rotation value after tool replacement increases by 63.04%.

[0051] Specifically, through the analysis and prediction trend chart of the rotation value of the track tool DCRM, the rotation value before tool replacement shows a downward trend as the tool continuously tunnels. When tunneling to the 385th ring, the tool rotation value is 60 rpm. Continuously tunneling to the 410th ring, the rotation value of the 46th track tool fluctuates between 51 rpm and 58 rpm. At this time, the 46th track tool has continuously tunneled 162 rings, the tool rotation value is lower than 60 rpm, and the measured tool wear amount is 24 mm. The tool wear situation shows a state of uniform wear and needs to be replaced. Thus, it is judged and proved that the 46th track tool is normally worn. After the tool replacement of the 46th track tool on the face cutter, the rotation value returns to the normal value of 138 rpm - 141 rpm, and the rotation value as a whole shows a steady and slow downward state. According to the tool replacement rule that the rotation value of the 46th track tool on the face cutter is lower than 60 rpm, it is predicted that the 28th tool replacement is located at the 548th ring, and it can continuously tunnel 138 rings after tool replacement.

[0052] b) Determine the wear limit values of the tools at each position on the cutter head, manually measure the actual wear amount of the tools, calculate the unit wear amount of the tools based on the actual tunneling distance and the actual wear amount generated by each tool, and analyze and predict the tunneling distance that each tool can achieve in real time;

[0053] The calculation formula for the predicted tunneling distance of each tool is:

[0054] δ = M / L... (3);

[0055] Ly = Mx / δ ……(4);

[0056] In Equation (3) and Equation (4), δ is the unit tool wear, M is the actual tool wear, L is the actual tunneling distance of the tool, Ly is the predicted tunneling distance of the tool, and Mx is the wear limit of the tool.

[0057] In this embodiment, the wear limit is determined according to the distribution position of each tool on the cutter head. For example, the wear limit of the center tool (tracks 1 - 12) is 25 mm, the wear limit of the face tool (tracks 13 - 76) is 30 mm, the wear limit of the edge tool (tracks 77 - 80) is 25 mm, the wear limit of the edge tool (tracks 81 - 84) is 20 mm, the wear limit of the edge tool (tracks 85 - 88) is 15 mm, and the wear limit of the edge tool (tracks 89A, 89B) is 10 mm. That is to say, the wear limit of the tools on the cutter head gradually decreases from the center to the edge of the cutter head.

[0058] At the same time, the predicted unit tool wear is defined based on the unit tool wear before replacement. By comparing the unit tool wear after replacement with the predicted unit tool wear, it is judged whether the tool has abnormal wear. Here, by judging the stability of the tool wear change through the change of the unit tool wear, the normal wear state of the tool can be accurately reflected.

[0059] In addition, when manually measuring the tool wear, a three - dimensional laser scanning device is used to perform a full - section scan on the worn tool to obtain a three - dimensional digital model, and the tool wear type and wear degree are analyzed and judged based on the three - dimensional digital model.

[0060] S3. Comprehensively analyze the results obtained in Step S1 and Step S2 to judge the wear state of each tool on the cutter head, timely determine and replace the worn tools on the cutter head, and through the comparison and verification of the data obtained in S1 and S2 before and after tool replacement, to determine the accuracy of the tool wear analysis and the tool replacement position, and ensure the reliability of the analysis result and the processing result.

[0061] In summary, after adopting this comprehensive analysis method, by monitoring the shield tunneling parameters, a mathematical model that can reflect the working state of the cutter head and cutters at different positions is established as the basis for judging the abnormal wear of the cutters; by monitoring the rotation values of the cutters at each position on the cutter head in real time, analyzing the change rules of the rotation values of the cutters at each position on the cutter head after each cutter change, and predicting the tunneling distance that the cutters at each position on the cutter head can achieve after each cutter change according to the change rules of the cutter rotation values; by determining the wear limit values of the cutters at each position on the cutter head, calculating the unit wear amount of the cutters based on the actual tunneling distance and the actual wear amount generated by each cutter, and analyzing and predicting the tunneling distance that each cutter can achieve in real time; and taking the results obtained by the three methods of the change of the working state of the cutters at different positions, predicting the tunneling distance that the cutters can achieve after each cutter change, and predicting the tunneling distance that the cutters can achieve in real time during the use of the cutters as the judgment basis and comprehensively analyzing to determine the wear state of each cutter on the cutter head, and being able to timely determine and replace the worn cutters on the cutter head. Therefore, compared with the prior art, the present invention is based on three ways of reflecting the working state of the cutters at different positions through the change of the shield tunneling parameters, predicting the tunneling distance that the cutters can achieve after each cutter change, and predicting the tunneling distance that the cutters can achieve in real time during the use of the cutters as the judgment basis, providing a technical means for studying the wear of the shield cutters in complex strata, avoiding the difficulty of cutter measurement and observation errors existing in the actual shield project, and at the same time making the analysis of the wear characteristics of the shield cutters in complex strata more sufficient and perfect; on the second hand, predicting the service life of the cutters after the cutter change based on the wear state of the previous cutter, providing a judgment basis for the cutter wear analysis; at the same time, forming a comparison of the lowest rotation values of the cutters during multiple cutter changes to facilitate the monitoring of the stability of the cutters during continuous tunneling; on the third hand, in order to avoid the wear of the cutter head and reduce the loss, by defining the lowest rotation value, ensuring that the cutters reaching the wear limit value can be discovered and replaced in advance; on the fourth hand, judging the stability of the cutter wear change through the change of the unit wear amount of the cutters, and being able to accurately reflect whether the wear state of the cutters is normal.

[0062] The above has made a detailed description of the present invention, aiming to enable those skilled in this field to understand the content of the present invention and implement it, and it cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit and essence of the present invention should be covered within the protection scope of the present invention.

Claims

1. A comprehensive analysis method for the wear of shield cutters in complex strata, characterized in that It includes the following steps: S1. Analyze the changes in shield tunneling parameters Monitor the shield tunneling parameters in real time, and establish a mathematical model that can reflect the working states of the cutter head and cutters at different positions as the basis for judging abnormal wear of the cutters; S2. Analyze the tunneling distances of each cutter a) Monitor the rotation values of the cutters at each position on the cutter head in real time, analyze the change rules of the rotation values of the cutters at each position on the cutter head after each cutter change, and predict the tunneling distances of the cutters at each position on the cutter head after each cutter change according to the change rules of the cutter rotation values; b) Determine the wear limits of the cutters at each position on the cutter head, calculate the unit wear amount of the cutters based on the actual tunneling distances and actual wear amounts of the cutters, and analyze and predict the tunneling distances of each cutter in real time; S3. Comprehensively analyze the results obtained in steps S1 and S2 to judge the wear states of the cutters on the cutter head, and timely determine and replace the worn cutters on the cutter head.

2. The comprehensive analysis method for shield cutter wear in complex strata according to claim 1, wherein In step S1, the total thrust, cutter head torque, and penetration of the cutter head in the shield are monitored in real time, and the established mathematical model is P = N / G... (1); Q = F / G... (2); In formulas (1) and (2), N is the cutter head torque, G is the penetration, and F is the total thrust; summarize the P values and Q values obtained from formulas (1) and (2), and reflect the wear states of each cutter through the changes in the P values and Q values.

3. The comprehensive analysis method for shield cutter wear in complex strata according to claim 2, characterized in that Take the actual tunneling distance of the shield as the abscissa, and take the P values and Q values as the ordinates to respectively plot the change trend charts of the P values and Q values, and determine the abnormal P values and Q values according to the change trend charts.

4. The comprehensive analysis method for shield cutter wear in complex strata according to claim 2 or 3, characterized in that, When the P values and Q values are abnormal, check each cutter step by step according to the wear-prone degree of the cutters at each position on the cutter head. After replacing the cutters, compare the changes in the P values and Q values before and after replacing the cutters to determine that the wear problem is eliminated.

5. The comprehensive analysis method for shield cutter wear in complex strata according to claim 1, characterized in that, In step a) of S2, define the minimum rotation value based on the change trend of the cutter rotation value before replacement, and predict the tunneling distance of the cutter after replacement based on the distance tunneled when the cutter rotation value before replacement drops to the minimum rotation value.

6. The comprehensive analysis method for shield cutter wear in complex strata according to claim 5, characterized in that When the cutter rotation value before replacement drops to fluctuate up and down within a certain range, it is judged that the cutter is in a state of uniform wear and needs to be replaced, and the defined minimum rotation value is greater than the cutter rotation value within this range.

7. The comprehensive analysis method for shield cutter wear in complex strata according to claim 1, characterized in that In step b) of S2, the calculation formula for the predicted tunneling distance of each cutter is: δ = M / L... (3); L y = M x / δ…… (4); In formulas (3) and (4), δ is the unit wear amount of the tool, M is the actual wear amount of the tool, L is the actual tunneling distance of the tool, L y is the predicted tunneling distance of the tool, M x is the wear limit of the tool.

8. The comprehensive analysis method for shield cutter wear in complex strata according to claim 7, characterized in that, Define the predicted unit wear amount of the cutter based on the unit wear amount of the cutter before replacement, and compare the unit wear amount of the cutter after replacement with the predicted unit wear amount of the cutter to judge whether the cutter has abnormal wear.

9. The comprehensive analysis method for shield cutter wear in complex strata according to claim 1 or 7 or 8, characterized in that In step b) of S2, manually measure the wear amount of the cutter.

10. The comprehensive analysis method for shield cutter wear in complex strata according to claim 9, characterized in that, When manually measuring the wear amount of the cutter, use a three-dimensional laser scanning device to perform a full-section scan on the worn cutter to obtain a three-dimensional digital model, and analyze and judge the wear type and wear degree of the cutter according to the three-dimensional digital model.