Method and device for predicting wear of a hard rock tunnel boring machine's cross-section disc cutter

Abstract

The application provides a method and device for predicting the wear of a hard rock tunnel boring machine's common cross-section disc cutter, comprising: obtaining the tunneling parameters of the machine, calculating the cutting coefficient of the machine according to the tunneling parameters and preset structural parameters of the machine; determining a target disc cutter, obtaining the rock mass information, and calculating the rolling and sliding distance of the target disc cutter per unit time; calculating the contact stress of the target disc cutter on the contact arc surface during rock breaking; calculating the weight wear of the target disc cutter per unit time; determining a target time period, and calculating the total weight wear of the target disc cutter in the target time period; the application can predict the wear of the disc cutter during construction, reduce the difficulty of monitoring the wear state of the disc cutter, improve the real-time and accuracy of the prediction, and improve the efficiency and safety of tunnel construction.

Description

Technical Field

[0001] This application relates to the field of hard rock tunnel boring equipment construction technology, and in particular to a method and equipment for predicting the wear of a constant cross-section disc cutter in a hard rock tunnel boring machine. Background Technology

[0002] Full-face hard rock tunnel boring machines (TBMs) are large, high-tech construction equipment used for excavating hard rock tunnels and underground passages. With the rapid development of transportation and urbanization, my country has become the country with the most tunnels and underground engineering projects in the world, and its development speed is the fastest. Therefore, full-face hard rock TBMs are being used more and more widely. The constant-section disc cutterhead is the most commonly used high-efficiency rock-breaking tool in hard rock TBMs. During hard rock geological construction, the cutterhead ring crushes the rock mass under the thrust and torque of the cutterhead. Simultaneously, the surface material of the cutterhead ring continuously wears off, gradually weakening the mechanical properties of the cutterhead. Once the wear reaches the limit position of the cutterhead ring, it will lose its rock-breaking ability. If it is not detected and replaced in time, it will cause damage to the cutterhead and even lead to cutterhead wear, resulting in construction failures, seriously hindering the construction progress, and increasing construction costs.

[0003] In related technologies, the high strength, high hardness, and brittle material properties of hard rock coupled with the characteristics of rock mass joint structure increase the difficulty of real-time prediction of tool wear status. Currently, there is still a lack of direct and effective technical means to detect tool wear status in real time. Among them, rock mass joint structure is an important factor affecting the mechanical properties of rock mass and directly affects the interaction between the cutter and the hard rock mass. However, in the existing technology, there is a lack of in-depth and specific analysis of the influence law of rock mass joint structure characteristics, which limits the applicability and accuracy of existing detection methods and makes it difficult to comprehensively and accurately predict the wear status of disc cutters with normal cross-section in jointed hard rock tunnel engineering in real time. Summary of the Invention

[0004] In view of this, this application provides a method and equipment for predicting the wear of a constant cross-section disc cutter in a hard rock tunnel boring machine, in order to solve the aforementioned technical problems.

[0005] To achieve the above objectives, this application provides a method for predicting the wear of disc cutters with a constant cross-section in a hard rock tunnel boring machine. The cutterhead of the tunnel boring machine is equipped with multiple disc cutters. The prediction method includes: Obtain the tunneling parameters of the tunneling machine, and calculate the cutting coefficient of the tunneling machine based on the tunneling parameters and the preset tunneling machine structural parameters; The target disc cutter is identified, the construction rock mass information is obtained, and the rolling and sliding distance of the target disc cutter per unit time is calculated based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. The contact stress of the target disc cutter acting on the contact arc surface during rock breaking is calculated based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. The weight wear of the target disc cutter per unit time is calculated based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass. Determine the target time period, and calculate the total weight wear of the target disc hob within the target time period based on the weight wear of the target disc hob per unit time.

[0006] Optionally, the tunneling parameters of the tunneling machine include: cutterhead thrust and cutterhead torque; the preset tunneling machine structural parameters include: the number of disc cutters on the cutterhead and the installation radius of the disc cutters on the cutterhead. The step of calculating the cutting coefficient of the tunneling machine based on its tunneling parameters and preset tunneling machine structural parameters includes: Based on the tunneling parameters of the tunneling machine and the preset structural parameters of the tunneling machine, the cutting coefficient of the tunneling machine is calculated according to the following formula. (1), in, CC Let be the cutting coefficient of the tunneling machine. N The number of disc hobs on the cutter head. r i The mounting radius of any of the disc hobs on the cutter head is [missing information]. For the cutter head N The sum of the installation radii of the aforementioned disc hobs, T r The cutterhead torque of the tunneling machine is... T h The thrust of the cutterhead of the tunneling machine is given.

[0007] Optionally, the tunneling parameters of the tunneling machine further include: the cutting depth and cutterhead rotation speed of the tunneling machine; the preset tunneling machine structural parameters further include: the radius of the target disc cutter and the installation radius of the target disc cutter on the cutterhead; the construction rock mass information includes: the friction coefficient of the construction rock mass, The step of calculating the rolling and sliding distance of the target disc cutter per unit time based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information includes: Based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information, the rolling and sliding distance of the target disc cutter per unit time is calculated according to the following formula. (2), (3), in, k It is a constant. R The radius of the target disc hob is... l i The target disc hob's rolling and sliding distance per unit time. p a This refers to the cutting depth of the tunneling machine during the rock-breaking process. R s The installation radius of the target disc hob on the cutter head is given. n The cutterhead rotation speed of the tunneling machine. m This is the friction coefficient of the rock mass under construction.

[0008] Optionally, the preset tunneling machine structural parameters further include: the cutter spacing between adjacent disc cutters and the cutting edge width of the target disc cutter; the construction rock mass information further includes: the uniaxial compressive strength of the construction rock mass, the tensile strength of the construction rock mass, the joint angle of the construction rock mass, and the joint spacing of the construction rock mass. The calculation of the contact stress on the contact arc surface of the target disc cutter during rock breaking, based on the tunneling parameters of the tunneling machine, the preset structural parameters of the tunneling machine, and the information of the working rock mass, includes: Based on the tunneling parameters of the tunneling machine, the preset structural parameters of the tunneling machine, and the information of the rock mass under construction, the contact stress acting on the contact arc surface of the target disc cutter during rock breaking is calculated according to the following formula. (4), in, P c The contact stress exerted on the contact arc surface by the target disc cutter during rock breaking is the [missing information]. S The distance between adjacent disc hobs on the cutter head. b The cutting edge width of the target disc hob. s c The uniaxial compressive strength of the rock mass under construction. s t The tensile strength of the rock mass under construction. J α The joint angle of the rock mass under construction. J S The joint spacing of the rock mass under construction; where, when J S The maximum value is 400 mm When used to represent a complete rock mass.

[0009] Optionally, the construction rock mass information further includes: the abrasion index of the construction rock mass. The calculation of the weight wear of the target disc cutter per unit time based on the rolling slip distance of the target disc cutter per unit time, the contact stress acting on the contact arc surface during rock breaking, and the information of the construction rock mass includes: Based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress exerted by the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass, the weight wear of the target disc cutter per unit time is calculated according to the following formula. (5), in, W i The weight wear of the target disc hob per unit time. A r The abrasion index of the rock mass under construction. la , β and c All are constants. α , β and c All results were obtained using standard ring-block wear simulation test methods. l These are coefficient constants obtained by fitting the standard ring block wear simulation test data and then correcting them based on the linear cutting experiments of the disc cutter and hard rock.

[0010] Optionally, calculating the total weight wear of the target disc hob within the target time period based on the weight wear per unit time includes: Based on the weight wear of the target disc hob per unit time, the total weight wear of the target disc hob within the target time period is calculated according to the following formula. (6), in, W iz The total weight wear of the target disc hob during the target time period. W iT For the first T The weight wear of the target disc hob per unit time. M The unit time is the quantity of time, and the target time period is the effective working time period of the tunnel boring machine during tunnel excavation.

[0011] Based on the same inventive concept, this application also provides a device for predicting the wear amount of a constant cross-section disc cutter in a hard rock tunnel boring machine, comprising: The first acquisition module is used to acquire the tunneling parameters of the tunneling machine and calculate the cutting coefficient of the tunneling machine based on the tunneling parameters and the preset tunneling machine structural parameters. The first calculation module is used to determine the target disc cutter, obtain the construction rock mass information, and calculate the rolling and sliding distance of the target disc cutter per unit time based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters and the construction rock mass information. The second calculation module is used to calculate the contact stress of the target disc cutter acting on the contact arc surface during rock breaking based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. The third calculation module is used to calculate the weight wear of the target disc cutter per unit time based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass. The fourth calculation module is used to determine the target time period and calculate the total weight wear of the target disc hob within the target time period based on the weight wear of the target disc hob per unit time.

[0012] Based on the same inventive concept, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable by the processor, wherein the processor implements the method described above when executing the computer program.

[0013] Based on the same inventive concept, this application also provides a non-transitory computer-readable storage medium that stores computer instructions for causing a computer to perform the method described above.

[0014] Based on the same inventive concept, this application also proposes a hard rock tunnel boring machine, including a predictive device for the wear amount of the constant cross-section disc cutter of the hard rock tunnel boring machine as described above, and / or an electronic device as described above, and / or a non-transitory computer-readable storage medium as described above.

[0015] As can be seen from the above, compared with the prior art, the method and equipment for predicting the wear of constant cross-section disc cutters in hard rock tunnel boring machines provided in this application have the following beneficial effects: Based on the mechanical relationship between the disc cutter and the rock mass during the rock breaking process of a hard rock tunnel boring machine (TBM), this application utilizes the tunneling parameters of the TBM measured on-site and the information of the working rock mass, combined with the preset structural parameters of the TBM, to predict in real time the wear of the disc cutter on the cutterhead of the TBM during the tunneling stage. This reduces the difficulty of monitoring the wear condition of the cutters, is closer to actual engineering applications, and has good real-time performance and accuracy. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in this application or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the installation of disc cutters in the cutterhead of a hard rock tunnel boring machine in this application; Figure 2 This is a flowchart illustrating the method for predicting the wear of a constant-section disc cutter in a hard rock tunnel boring machine according to this application. Figure 3 This is a schematic diagram of the device for predicting the wear of a constant-section disc cutter in a hard rock tunnel boring machine in this application. Figure 4 This is a schematic diagram of the electronic device in this application. Detailed Implementation

[0018] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with specific embodiments and the accompanying drawings.

[0019] It should be noted that, unless otherwise defined, the technical or scientific terms used in the embodiments of this application should have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. The terms "first," "second," and similar terms used in the embodiments of this application do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. Terms such as "upper," "lower," "left," and "right" are only used to indicate relative positional relationships; when the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0020] In related technologies, full-face hard rock tunnel boring machines (TBMs) are large-scale construction equipment used for excavating rock tunnels and underground passages, and are widely used in tunnel and underground engineering. The cutter system is a key excavation component of a hard rock TBM, with the constant-section disc cutterhead being the most commonly used and efficient rock-breaking tool. During hard rock geological construction, the cutterhead ring crushes and breaks the rock mass under the thrust and torque of the cutterhead to achieve tunnel formation and construction. Multiple disc cutters are installed on the TBM cutterhead; for example, the installation configuration of the disc cutters on the TBM cutterhead can be as follows: Figure 1 As shown, its cutter head axis is located at the center of the cutter head, and the radius of the cutter head is 3965. mm The cutter head has 51 tool positions, each corresponding to a disc hob cutting edge. The tool position numbers from the center of the cutter head towards the edge are 1, 2, 3...40, 41, 42. This means that the larger the tool position number, the farther the tool is from the center of the cutter head. The numbers between adjacent tool positions represent the difference in their mounting radii, i.e., the tool spacing, expressed in units of... mm .

[0021] The cutter head is divided into three areas based on their location: the center area, the panel area, and the edge area. A central double-edged disc cutter is installed in the center area, a front-facing single-edged disc cutter is installed in the panel area, and an edge-facing single-edged disc cutter is installed in the edge area. Please refer to [link / reference needed] for details. Figure 1 Tool positions 1 through 8 can each accommodate four 17-inch center double-edged hobs. The spacing between adjacent tool positions for each double-edged hob is 101.5 mm. mm The mounting radius of tool position 1 on the tool turret is 68.5. mm Thirty-one 19-inch single-edged hobs are installed between tool positions 8 and 40, with tool positions numbered sequentially from 9 to 40. The spacing between adjacent tool positions is 83 mm. mm Eleven 19-inch edge single-edged hobs are installed in tool positions 40 to 51. The tool spacing between tool position 41 and tool position 40 is 82 mm. mm The tool spacing between tool positions 42 and 41 is 77.6 mm. mm The tool spacing between tool positions 43 and 42 is 74.9 mm. mm The tool spacing between tool positions 44 and 43 is 66.4 mm. mm The tool spacing between tool positions 45 and 44 is 60.9 mm. mm The tool spacing between tool positions 46 and 45 is 51. mm The tool spacing between tool positions 47 and 46 is 41.4 mm. mm The tool spacing between tool positions 48 and 47 is 28.1 mm. mm The tool spacing between tool positions 49 and 48 is 19.8 mm. mmThe tool spacing between tool positions 50 and 49 is 10.3. mm The tool spacing between tool positions 51 and 50 is 4.6. mm .

[0022] This application provides a method for predicting the wear of a constant-section disc cutter in a hard rock tunnel boring machine. Please refer to [link to relevant documentation]. Figure 2 The tunneling machine cutterhead is equipped with multiple disc-shaped cutters, and the prediction methods include: Step S100: Obtain the tunneling parameters of the tunneling machine, and calculate the cutting coefficient of the tunneling machine based on the tunneling parameters and the preset tunneling machine structural parameters; In this step, when the hard rock tunnel boring machine is working, the disc cutter crushes the rock mass under the combined action of the cutterhead thrust and cutterhead torque to form a tunnel. At the same time, the hard rock tunnel boring machine can be controlled by a controller to actively acquire the tunneling parameters of the tunnel boring machine during the tunneling process, and combine them with the preset tunnel boring machine structural parameters so that the controller can calculate the cutting coefficient of the tunnel boring machine.

[0023] Step S200: Determine the target disc cutter, obtain the construction rock mass information, and calculate the rolling and sliding distance of the target disc cutter per unit time based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. In this step, the controller selects any one of the multiple disc cutters on the cutterhead as the target disc cutter. The controller then calculates the rolling and sliding distance of the target disc cutter per unit time based on the tunneling machine's (TBM) tunneling parameters, preset TBM structural parameters, construction rock mass information, and the TBM's cutting coefficient. For any disc cutter, the relevant parameter information can be directly obtained from the preset TBM structural parameters or pre-stored in the controller for retrieval. To facilitate the calculation of various parameters for the target disc cutter, the unit time can be set as the time interval for updating the TBM tunneling parameters, for example, 1 minute. Furthermore, the TBM tunneling parameters are the real-time operating status parameters collected by the TBM. The construction rock mass information can be determined through laboratory testing based on rock mass samples obtained from tunnel geological exploration and is actively acquired by the controller for calculation purposes.

[0024] Step S300: Calculate the contact stress on the contact arc surface of the target disc cutter during rock breaking based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information; In this step, when the tunnel boring machine is excavating a tunnel, the disc cutter on the cutterhead not only rotates continuously around its own axis, but also revolves around the central axis of the cutterhead. Based on the obtained cutting depth, the preset tunnel boring machine structural parameters and the information of the rock mass, the controller can calculate the contact stress of the target disc cutter on the contact arc surface during the rock breaking process.

[0025] Step S400: Calculate the weight wear of the target disc cutter per unit time based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass. In this step, the controller calculates the rolling and sliding distance of the target disc cutter per unit time and the contact stress of the target disc cutter on the contact arc surface during rock breaking. Combined with the construction rock mass information, it can calculate the weight wear of the target disc cutter per unit time, thereby predicting the weight wear of the target disc cutter per unit time.

[0026] Step S500: Determine the target time period and calculate the total weight wear of the target disc hob within the target time period based on the weight wear of the target disc hob per unit time.

[0027] In this step, after obtaining the weight wear amount of the target disc cutter per unit time, the controller can select a target time period and determine the number of unit times included in the target time period. Combining the weight wear amount of the target disc cutter per unit time obtained above, the total weight wear amount of the target disc cutter within the target time period can be calculated. The target time period can be the effective working time period of the tunnel boring machine during tunnel excavation, that is, the time period from the start time to the end time of this detection, excluding the downtime and abnormal working time of the tunnel boring machine, so as to improve the accuracy of the weight wear amount prediction of the target disc cutter.

[0028] In some embodiments, the tunneling parameters of the tunneling machine include: cutterhead thrust and cutterhead torque; the preset structural parameters of the tunneling machine include: the number of disc cutters on the cutterhead and the installation radius of the disc cutters on the cutterhead. The cutting coefficient of the tunneling machine is calculated based on its tunneling parameters and preset structural parameters, including: Based on the tunneling parameters and preset structural parameters of the tunneling machine, the cutting coefficient of the tunneling machine is calculated according to the following formula. (1), in, CC The cutting coefficient of the tunneling machine. N This refers to the number of disc hobs on the cutter head. r iLet the installation radius of any disc hob on the cutter head be . For the cutter head N The sum of the installation radii of the disc hobs, T r This refers to the cutterhead torque of the tunneling machine. T h This refers to the thrust of the cutterhead of the tunneling machine.

[0029] Specifically, the tunneling parameters of the tunneling machine may include the cutterhead thrust and cutterhead torque, and the preset tunneling machine structural parameters may include the number of disc cutters on the cutterhead and the installation radius of the disc cutters on the cutterhead; among them, since the tunneling machine cutting coefficient is related to the cutterhead thrust and cutterhead torque in the tunneling parameters of the tunneling machine, the cutterhead thrust and cutterhead torque can be actively obtained by the controller, and the controller calculates the cutting coefficient of the tunneling machine based on the cutterhead thrust and cutterhead torque and in combination with formula (1); In formula (1), CC The cutting coefficient of the tunneling machine. N The number of disc cutters installed on the cutterhead of the tunneling machine. r i The installation radius of any disc cutter mounted on the cutterhead of a tunneling machine, in units of... m , For mounting on the cutterhead of a tunneling machine N The sum of the installation radii of the disc hobs, in units of m , T r The cutterhead torque of the tunneling machine, in units of KN · m , T h The thrust of the cutterhead of the tunneling machine, in units of... KN The cutterhead torque and cutterhead thrust can be collected in real time by the corresponding data acquisition system installed inside the tunneling machine, and the acquired cutterhead torque and cutterhead thrust are sent to the controller for the controller to use.

[0030] For example, the cutterhead of a tunneling machine can be equipped with 51 disc cutters, i.e. N =51, and then calculate the sum of the installation radii of the disc hob. Using the disc cutter with cutter position number 25 as the target disc cutter, the wear of disc cutter number 25 was measured three times consecutively at different rock mass excavation stages with three different joint structures. The results are now analyzed and calculated based on a set of excavation parameters and the prediction method in this application.

[0031] Initial radius of disc hob No. 25 R =241 mm Blade width b =40 mmhob installation radius R s =2.203 m .

[0032] Rock Mass I: The rock mass type is granite, with a friction coefficient of... m =0.5; Uniaxial compressive strength of the rock mass under construction s c =85.0 MPa Tensile strength of the rock mass under construction s t =13.0 MPa Joint angle of the construction rock mass α = π / 4; Joint spacing J S =90 mm .

[0033] Parameters for disc hob #25: Hob #25 is a newly replaced hob in this stage; hob radius... R =241 mm ; During this tunneling phase, the tunneling machine collects tunneling parameters in real time every minute, one set of which is: cutterhead thrust. T h =8083.858 KN Cutter head torque T r =1233.878 KN · m Cutter head speed n =5.661 rpm , cut depth p =12.068 mm Then the cutting coefficient at that moment CC for:

[0034] Rock Mass II: The rock mass type is granite, with a friction coefficient of... m =0.5; Uniaxial compressive strength of the rock mass under construction s c =85.0 MPa Tensile strength of the rock mass under construction s t =13.0 MPa Joint angle of the construction rock mass α = π / 4; Joint spacing J S =120 mm .

[0035] Parameters for disc hob No. 25: The radius wear of hob No. 25 in this stage is 4. mm radius of hob No. 25 R =(241-4) mm =237 mm ; During this tunneling phase, the tunneling machine collects tunneling parameters in real time every minute, one set of which is: cutterhead thrust. T h =6487.446 KN Cutter head torque T r =707.372 KN · m Cutter head speed n =5.711 rpm , cut depth p =8.007 mm Then the cutting coefficient at that moment CC for:

[0036] Rock Mass III: The rock mass type is granite, with a friction coefficient of... m =0.5; Uniaxial compressive strength of the rock mass under construction s c =80.0 MPa Tensile strength of the rock mass under construction s t =12.0 MPa Intact surrounding rock, with the joint angle of the construction rock mass set to zero, i.e. α =0; Joint spacing is 400. mm ,Right now J S =400 mm .

[0037] Parameters for hob No. 25: The radius wear of hob No. 25 in this stage is 5. mm radius of hob #25 R =(241-5) mm =236 mm ; During this tunneling phase, the tunneling machine collects tunneling parameters in real time every minute, one set of which is: cutterhead thrust. T h =5583.352 KN Cutter head torque T r =898.027 KN · m Cutter head speed n =4.639 rpm , cut depth p =10.277 mm Then the cutting coefficient at that moment CC for:

[0038] Similarly, the aforementioned method can be used to calculate the cutting coefficient of the tunneling machine within any 1 minute. CC .

[0039] In some embodiments, the tunneling parameters of the tunneling machine also include: the cutting depth and cutterhead rotation speed of the tunneling machine; the preset tunneling machine structural parameters also include: the radius of the target disc cutter and the installation radius of the target disc cutter on the cutterhead; the construction rock mass information includes: the friction coefficient of the construction rock mass, The rolling and sliding distance of the target disc cutter per unit time is calculated based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset structural parameters of the tunneling machine, and the information of the construction rock mass. This includes: Based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset structural parameters of the tunneling machine, and the information of the rock mass under construction, the rolling and sliding distance of the target disc cutter per unit time is calculated according to the following formula. (2), (3), in, k It is a constant. R The radius of the target disc hob, l i Let be the rolling and sliding distance of the target disc hob per unit time. p a This refers to the cutting depth of the tunnel boring machine during rock breaking. R s The target disc hob is mounted on the cutter head at its radius. n The cutterhead rotation speed of the tunneling machine. m This is the friction coefficient of the rock mass under construction.

[0040] Specifically, the tunneling parameters of the tunneling machine may also include the cutting depth and cutterhead rotation speed of the tunneling machine, and the preset tunneling machine structural parameters may also include the radius of the target disc cutter and the installation radius of the target disc cutter on the cutterhead; the construction rock mass information may include the friction coefficient of the construction rock mass; wherein, the controller can determine one of the multiple disc cutters in the cutterhead as the target disc cutter, and actively acquire the tunneling parameters of the tunneling machine and the construction rock mass information, and calculate the rolling and sliding distance of the target disc cutter per unit time by combining the preset tunneling machine structural parameters and the cutting coefficient of the tunneling machine; in formula (2), k It is a constant and has no unit. R The radius of the target disc hob, in units of mm Based on the radius of the target disc hob, the following formula (2) can be used to calculate the radius of the disc hob. k In formula (3),l i The rolling and sliding distance of the target disc cutter on the cutterhead of the tunneling machine per unit time, in units of... m , p a The cutting depth of the tunnel boring machine during rock breaking, in units of... mm , R s The installation radius of the target disc cutter on the tunneling machine cutterhead, in units of... m , n The cutterhead rotation speed of the tunneling machine, in units of... rpm , m The friction coefficient of the rock mass under construction is given. During the tunneling process, the cutting depth and cutterhead speed in the tunneling parameters can be collected by the corresponding data acquisition system installed inside the tunneling machine. The collected cutting depth, cutterhead speed and friction coefficient of the rock mass are sent to the controller. The radius of the target disc cutter and the installation radius of the target disc cutter in the preset tunneling machine structural parameters can be pre-input or stored in the controller so that the controller can calculate the rolling and sliding distance of the target disc cutter in the tunneling machine cutterhead per unit time based on the aforementioned data.

[0041] For example, based on formulas (2) and (3), according to the cutting coefficient of the tunneling machine CC Determine the rolling and sliding distance of the target disc hob in the cutter head per unit time (e.g., 1 minute). l i ,in: In rock mass stage I, the tunneling parameters at that moment are combined with the cutting coefficient calculated for that stage. CC Calculate the corresponding rolling slip distance l 25 :

[0042]

[0043] In rock mass stage II, the tunneling parameters at that moment are combined with the cutting coefficient calculated for that stage. CC Calculate the corresponding rolling slip distance l 25 :

[0044]

[0045] In rock mass stage III, the tunneling parameters at that moment are combined with the cutting coefficient calculated for that stage. CC Calculate the corresponding rolling slip distance l25 :

[0046]

[0047] Similarly, the method disclosed above can calculate the rolling slip distance of the target disc hob within any 1 minute. l i .

[0048] In some embodiments, the preset tunneling machine structural parameters also include: the cutter spacing between adjacent disc cutters and the cutting edge width of the target disc cutter; the construction rock mass information also includes: the uniaxial compressive strength of the construction rock mass, the tensile strength of the construction rock mass, the joint angle of the construction rock mass, and the joint spacing of the construction rock mass. Based on the tunneling parameters of the tunneling machine, the preset structural parameters of the tunneling machine, and the information of the working rock mass, the contact stress acting on the contact arc surface of the target disc cutter during rock breaking is calculated, including: Based on the tunneling parameters of the tunneling machine, the preset structural parameters of the tunneling machine, and the information of the rock mass under construction, the contact stress acting on the contact arc surface of the target disc cutter during rock breaking is calculated according to the following formula. (4), in, P c The contact stress exerted on the contact arc surface by the target disc cutter during rock breaking is considered. S The tool spacing between adjacent disc hobs on the cutter head. b The cutting edge width of the target disc hob. s c The uniaxial compressive strength of the rock mass under construction. s t The tensile strength of the rock mass under construction. J α The joint angle of the rock mass under construction. J S The joint spacing of the rock mass under construction; where, when J S The maximum value is 400 mm When used to represent a complete rock mass.

[0049] Specifically, the preset tunneling machine structural parameters may also include the cutter spacing between adjacent disc cutters and the cutting edge width of the target disc cutter; the construction rock mass information may also include: the uniaxial compressive strength of the construction rock mass, the tensile strength of the construction rock mass, the joint angle of the construction rock mass, and the joint spacing of the construction rock mass; the controller can actively acquire the construction rock mass information and the cutting depth in the tunneling parameters of the tunneling machine, and calculate the contact stress on the contact arc surface of the target disc cutter during rock breaking, and calculate and determine the contact stress on the contact arc surface of the disc cutter when breaking rock during the construction of jointed hard rock tunnel engineering; in formula (4), P c The contact stress is the stress exerted on the contact arc surface by the target disc cutter on the cutterhead of the tunneling machine during rock breaking, expressed in units of 1. MPa , S The distance between adjacent disc cutters on the cutterhead of a tunneling machine, in units of 1. mm , b The cutting edge width of the target disc cutter of the tunneling machine, in units of mm, s c The uniaxial compressive strength of the rock mass under construction. s t The tensile strength of the rock mass under construction. J α The joint angle of the rock mass under construction refers to the angle between the joint surface of the rock mass and the tunnel axis, measured in units of 1. rad, J S The joint spacing of the rock mass under construction, in units of mm Among them, when the joint spacing of the construction rock mass is 400 mm At this point, the mechanical properties of the rock mass under construction are very similar to those of the intact rock mass. Therefore, J S The maximum value is 400 mm It can be used to represent a complete rock mass.

[0050] It should be noted that in a tunneling machine, the distance between adjacent disc cutters on the cutterhead refers to the difference in the installation radii of adjacent disc cutters on the cutterhead. The cutting edge width of the target disc cutter can be obtained by measurement. When the target disc cutter is a central double-edged cutter, its cutting edge width can be measured separately as two single-edged cutters. The cutting edge width of the target disc cutter and the distance between adjacent disc cutters on the cutterhead can be pre-input or stored in the controller. The controller can directly retrieve and apply these parameters during calculation to calculate the contact stress of the target disc cutter acting on the contact arc surface during rock breaking.

[0051] For example, in the construction of jointed hard rock tunnels, the contact stress acting on the contact arc length during the rock breaking process of the target disc cutter can be determined based on formula (4).P c ,in: Based on the rock mass parameters of stage I and the parameters of the target disc cutter, combined with the tunneling parameters per unit time at that moment, the contact stress acting on the contact arc surface during the rock breaking process of disc cutter No. 25 is calculated. P c for:

[0052] Based on the rock mass parameters of stage II and the parameters of the target disc cutter, combined with the tunneling parameters per unit time at that moment, the contact stress acting on the contact arc surface during the rock breaking process of disc cutter No. 25 is calculated. P c for:

[0053] Based on the rock mass parameters of stage III and the parameters of the target disc cutter, combined with the tunneling parameters per unit time at that moment, the contact stress acting on the contact arc surface during the rock breaking process of disc cutter No. 25 is calculated. P c for:

[0054] Therefore, the aforementioned method can calculate the contact stress acting on the contact arc surface during any disc cutter rock breaking process. P c .

[0055] In some embodiments, the construction rock mass information also includes: the abrasion index of the construction rock mass. The weight wear of the target disc cutter per unit time is calculated based on the rolling slip distance of the target disc cutter per unit time, the contact stress acting on the contact arc surface during rock breaking, and the information of the construction rock mass. This includes: Based on the rolling slip distance of the target disc cutter per unit time, the contact stress exerted by the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass, the weight wear of the target disc cutter per unit time is calculated according to the following formula. (5), in, W i The weight wear of the target disc hob per unit time. A r The abrasiveness index of the rock mass under construction. la , β and c All are constants. α , β and c All results were obtained using standard ring-block wear simulation test methods. l The coefficient constants are obtained by fitting the standard ring block wear simulation test data and then correcting it based on the linear cutting test of disc cutter and hard rock.

[0056] Specifically, the construction rock mass information may also include the abrasiveness index of the construction rock mass; the controller can calculate the weight wear of the target disc cutter per unit time based on the obtained rolling slip distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the abrasiveness index of the construction rock mass; in formula (5), W i The weight wear of the target disc hob per unit time, in units of Kg, A r The abrasiveness index of the rock mass can be used as a numerical value to describe the abrasiveness of the rock mass during construction. CAI Index substitution, la , β and c All are constants. α , β and c All results were obtained using standard ring-block wear simulation test methods. l The coefficient constants are obtained by fitting the standard ring block wear simulation test data and then correcting it based on the linear cutting test of disc cutter and hard rock.

[0057] Among them, the abrasiveness index of the geological rock mass where the tunneling machine is located can be determined by internationally recognized rock abrasiveness index. CAI Obtained by experimental measurement, for example CAI =1.91; α , β and c The constant can be obtained through wear simulation testing. Specifically, tool samples are made using the material of a disc hob, and rock samples are made using rock materials typical of the geological conditions of the project. Following the principles of similar geometry, consistent material properties, similar contact stress, and similar relative motion between the simulation and actual systems, 360 sets of standard ring-block wear simulation tests can be conducted using an M-2000 wear testing machine. Based on the test results, the constant can be obtained. α =2.23, β =2.29, c =1; Based on the annular wear simulation test, combined with the linear cutting test of the actual disc cutter and the actual rock mass, the constant can be obtained. l =1.03×10 -8 .

[0058] For example, based on formula (5), the weight wear of the target disc cutter on the cutterhead of the tunnel boring machine per unit time during the construction of a hard rock tunnel can be determined, where: In rock mass stage I, by combining the aforementioned No. 25 disc cutter, the rolling slip distance of the target disc cutter per unit time and the contact stress of the target disc cutter acting on the contact arc surface during rock breaking can be calculated, and the weight wear of the No. 25 disc cutter per unit time can be calculated. W 25 :

[0059] In rock mass stage II, by combining the aforementioned No. 25 disc cutter, the rolling slip distance of the target disc cutter per unit time and the contact stress of the target disc cutter acting on the contact arc surface during rock breaking can be calculated, and the weight wear of the No. 25 disc cutter per unit time can be calculated. W 25 :

[0060] In rock mass stage III, by combining the aforementioned No. 25 disc cutter, the rolling slip distance of the target disc cutter per unit time and the contact stress of the target disc cutter acting on the contact arc surface during rock breaking can be calculated, and the weight wear of the No. 25 disc cutter per unit time can be calculated. W 25 :

[0061] Therefore, the weight wear of any disc hob per unit time can be calculated using the method disclosed above. W i .

[0062] In some embodiments, the total weight wear of the target disc hob over a target time period is calculated based on the weight wear of the target disc hob per unit time, including: Based on the weight wear of the target disc hob per unit time, the total weight wear of the target disc hob within the target time period is calculated using the following formula. (6), in, W iz This represents the total weight wear of the target disc hob within the target time period. W iT For the first T The amount of weight wear of the target disc hob per unit time. M The quantity per unit of time; the target time period is the effective working time of the tunnel boring machine during tunnel excavation.

[0063] Specifically, after calculating the weight wear of the target disc hob per unit time, a time period can be randomly selected as the target time period. The number of unit times contained in the target time period can be calculated. Combined with the weight wear of the target disc hob per unit time obtained above, the total weight wear of the target disc hob in the target time period can be calculated by summation. That is, the prediction method provided in this application can predict the total weight wear of the target disc hob in the target time period. Among them, in formula (6), W iz This represents the total weight wear of the target disc cutterhead on the tunneling machine over a target time period. W iT For the first T The amount of weight wear of the target disc hob per unit time. M The number of units of time is the effective working time of the tunnel boring machine in the tunneling process. The controller can determine the total weight wear of the target disc cutter during the target time period when the tunnel boring machine is normally tunneling in the jointed hard rock tunnel project according to formula (6), so as to accurately predict the actual wear of the target disc cutter.

[0064] For example, based on formula (6), the total weight wear of the target disc cutter during normal tunneling of a tunnel boring machine in jointed hard rock tunnel engineering can be calculated over a preset time period. W 25z ,in: During Rock Mass Stage I, the No. 25 disc cutter was replaced with a new one at 14:16 on May 9, 2023. The first wear test of this cutter was conducted at 9:45 on May 12, 2023, and the wear on the cutter radius was 4 mm. mm The corresponding weight wear is 1.878. Kg The tunneling stage, excluding tunneling machine downtime and abnormal operation time, includes a total effective tunneling time of 928 minutes. The preset time period is 928 minutes. 928 sets of relevant parameters during the tunneling process are collected, including the tunneling parameters of the tunneling machine such as cutterhead thrust, cutterhead torque, cutterhead speed and cutting depth, as well as the friction coefficient, joint angle and joint spacing of the construction rock mass in the construction rock mass information. Combined with the radius and blade width of the disc cutter in the preset tunneling machine structural parameters, the weight wear of the 25th disc cutter per minute is calculated using the aforementioned formulas (1)-(5). Then, the weight wear of the 25th disc cutter during this time period is calculated using formula (6).

[0065] The comparison shows that the total weight wear of the target disc hob within the preset time period obtained by the prediction method in this application deviates from the actual wear during that period by only 0.002, with a deviation rate of only 0.11%. Therefore, the prediction is relatively accurate.

[0066] During the second stage of rock mass, the No. 25 hobbing cutter underwent its first wear test, showing a radius wear of 4. mm Excavation resumed at 14:48 on May 12, 2023. A second inspection of the cutter wear was conducted at 7:11 on May 13, 2023, revealing a cutter radius wear of 5 mm. mm During this stage, the hob radius wears by 1. mm The corresponding weight wear is 0.4646. Kg The tunneling stage, excluding tunneling machine downtime and abnormal operation time, includes a total effective tunneling time of 262 minutes. The preset time period is 262 minutes. 262 sets of relevant parameters during the tunneling process are collected, including the tunneling parameters of the tunneling machine such as cutterhead thrust, cutterhead torque, cutterhead speed and cutting depth, as well as the friction coefficient, joint angle and joint spacing of the construction rock mass in the construction rock mass information. Combined with the radius and blade width of the disc cutter in the preset tunneling machine structural parameters, the wear amount of the No. 25 cutter per minute is calculated using the aforementioned formulas (1)-(5). Then, the weight wear amount of the No. 25 disc cutter during this time period is calculated using formula (6). W 25z :

[0067] The comparison shows that the prediction method in this application yields a total weight wear of the target disc hob within a preset time period that deviates from the actual wear during that period by only -0.0016, with a deviation rate of 0.34%. Therefore, the prediction is relatively accurate.

[0068] During the third stage of rock mass, the No. 25 hobbing cutter underwent its second wear test, showing a radius wear of 5. mm Excavation resumed at 16:40 on May 13, 2023. At 12:58 on May 16, 2023, the wear condition of the cutter was checked for the third time, and the wear on the cutter radius was 6 mm. mm During this stage, the hob radius wears by 1. mm The corresponding weight wear is 0.4646. KgExcluding downtime and abnormal operation time of the tunneling machine, the tunneling stage includes a total effective tunneling time of 835 minutes. 835 sets of relevant parameters during the tunneling process were collected, including the tunneling parameters of the tunneling machine such as cutterhead thrust, cutterhead torque, cutterhead speed, and cutting depth. Combined with the friction coefficient, joint angle, and joint spacing of the construction rock mass in the construction rock mass information, and combined with the radius and blade width of the disc cutter in the preset tunneling machine structural parameters, the wear amount of the 25th cutter per minute was calculated using the aforementioned formulas (1)-(5). Then, the weight wear amount of the 25th disc cutter during this time period was calculated using formula (6). W 25z :

[0069] The comparison shows that the total weight wear of the target disc hob within the preset time period obtained by the prediction method in this application deviates from the actual wear during that period by only -0.0271, with a deviation rate of 5.83%. Therefore, the prediction is relatively accurate.

[0070] Therefore, the method for predicting the wear of constant cross-section disc cutters in hard rock tunnel boring machines used in this application has the following advantages: Based on the influence of the joint orientation angle of the rock mass, the joint angle of the rock mass under construction affects the contact stress of the disc cutter breaking the rock, which in turn affects the cutting depth of the tunneling machine during construction. This application, based on the mechanical analysis of the contact action between the disc cutter and the rock mass, and using actual engineering field experimental data, clarifies the variation law of the cutting depth with the joint angle of the rock mass under construction. The correlation with the field experimental data reaches more than 90%, which truly reflects the actual law of engineering application.

[0071] Based on the influence of joint spacing, the joint spacing of the rock mass under construction is a key factor affecting the contact stress of the disc cutter breaking the rock by the tunnel boring machine; this application, in addition to considering joint spacing greater than 100... mm The depth analysis at that time clarified that the joint spacing was greater than 100. mm The study investigated the variation of the tunnel boring machine's cutting depth with the joint spacing of the rock mass within the specified range, and also examined the joint spacing within 100... mm A thorough analysis of the cutting depth within the time frame is conducted. By utilizing the piecewise functional relationship between the cutting depth and the joint spacing of the construction rock mass, the full range of joint spacing variations is covered, which can meet the actual needs of the project.

[0072] Regarding the real-time updating method of the rolling slip distance of the disc cutter, the slip distance of the disc cutter during the rolling and crushing of rock mass constantly changes with the cutting coefficient, cutterhead rotation speed, cutting depth, and friction coefficient between the cutter and the rock mass being worked on. Furthermore, wear continuously reduces the rolling radius of the cutter, causing the rolling slip distance of the disc cutter to change accordingly. This application utilizes the tunneling parameters collected in real time by the tunneling machine and, based on the coefficient... kThe relationship between the disc cutter radius and the target disc cutter radius is calculated in real time, which increases the update frequency of tunneling parameters, eliminates the influence of disc cutter radius changes, and thus improves the accuracy of the calculation.

[0073] It should be noted that the method in this embodiment can be executed by a single device, such as a computer or server. The method can also be applied in a distributed scenario, where multiple devices cooperate to complete the task. In such a distributed scenario, one of these devices may execute only one or more steps of the method in this embodiment, and the multiple devices will interact with each other to complete the method.

[0074] It should be noted that the above description describes some embodiments of this application. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in a different order than that shown in the above embodiments and still achieve the desired result. Furthermore, the processes depicted in the drawings do not necessarily require a specific or sequential order to achieve the desired result. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0075] Based on the same inventive concept, and corresponding to any of the above embodiments, this application also provides a device for predicting the wear amount of a constant cross-section disc cutter in a tunneling machine.

[0076] refer to Figure 3 A device for predicting the wear of a constant cross-section disc cutter in a tunneling machine, comprising: The first acquisition module 10 is used to acquire the tunneling parameters of the tunneling machine and calculate the cutting coefficient of the tunneling machine based on the tunneling parameters and the preset tunneling machine structural parameters. The first calculation module 20 is used to determine the target disc cutter, obtain the construction rock mass information, and calculate the rolling and sliding distance of the target disc cutter per unit time based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters and the construction rock mass information. The second calculation module 30 is used to calculate the contact stress of the target disc cutter acting on the contact arc surface during the rock breaking process based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters and the construction rock mass information. The third calculation module 40 is used to calculate the weight wear of the target disc cutter per unit time based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the construction rock mass information. The fourth calculation module 50 is used to determine the target time period and calculate the total weight wear of the target disc hob within the target time period based on the weight wear of the target disc hob per unit time.

[0077] Specifically, in this embodiment, the first acquisition module can actively acquire the tunneling parameters of the tunneling machine during construction. Based on preset tunneling machine structural parameters, the first acquisition module can calculate the cutting coefficient of the tunneling machine by combining the tunneling parameters and the preset tunneling machine structural parameters, and send the obtained cutting coefficient to the first calculation module. The first calculation module identifies the target disc cutter among multiple disc cutters on the cutterhead, and simultaneously acquires the construction rock mass information of the construction area. Combining the tunneling parameters, preset tunneling machine structural parameters, construction rock mass information, and tunneling machine cutting coefficient, the first calculation module can calculate the rolling and sliding distance of the target disc cutter per unit time, and send the rolling and sliding distance of the target disc cutter per unit time to the second calculation module. At the same time, the second calculation module can calculate the contact stress of the target disc cutter acting on the contact arc surface during rock breaking based on the tunneling parameters, construction rock mass information, and preset tunneling machine structural parameters, and calculate the contact stress of the target disc cutter during rock breaking. During the process, the contact stress acting on the contact arc surface is sent to the third calculation module. The third calculation module receives the contact stress acting on the contact arc surface of the target disc cutter during rock breaking. Based on the rolling and sliding distance of the target disc cutter per unit time sent by the first calculation module, the contact stress acting on the contact arc surface of the target disc cutter during rock breaking sent by the second calculation module, and the construction rock mass information, it calculates the weight wear of the target disc cutter per unit time and sends the calculated weight wear of the target disc cutter per unit time to the fourth calculation module. After receiving the weight wear of the target disc cutter per unit time, the fourth calculation module can select a target time period and calculate the total weight wear of the disc cutter within the target time period based on the weight wear of the target disc cutter per unit time. This accurately predicts the total weight wear of the disc cutter in the cutterhead of the hard rock tunnel boring machine during the working stage, i.e., the total weight wear within the target time period, meeting the actual needs of the project and improving the real-time performance and accuracy of the prediction.

[0078] For ease of description, the above devices are described in terms of function, divided into various modules. Of course, in implementing this application, the functions of each module can be implemented in one or more software and / or hardware.

[0079] The apparatus described above is used to implement the method for predicting the wear amount of the constant cross-section disc cutter of the hard rock tunnel boring machine in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0080] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the program, it implements the method for predicting the wear amount of the constant cross-section disc cutter of the hard rock tunnel boring machine as described in any of the above embodiments.

[0081] Figure 4 This embodiment illustrates a more specific hardware structure of an electronic device. The device may include a processor 1010, a memory 1020, an input / output interface 1030, a communication interface 1040, and a bus 1050. The processor 1010, memory 1020, input / output interface 1030, and communication interface 1040 are interconnected internally via the bus 1050.

[0082] The processor 1010 can be implemented using a general-purpose CPU (Central Processing Unit), microprocessor, application-specific integrated circuit (ASIC), or one or more integrated circuits, and is used to execute relevant programs to implement the technical solutions provided in the embodiments of this specification.

[0083] The memory 1020 can be implemented in the form of ROM (Read Only Memory), RAM (Random Access Memory), static storage device, dynamic storage device, etc. The memory 1020 can store the operating system and other applications. When the technical solutions provided in the embodiments of this specification are implemented by software or firmware, the relevant program code is stored in the memory 1020 and is called and executed by the processor 1010.

[0084] The input / output interface 1030 is used to connect input / output modules to realize information input and output. Input / output modules can be configured as components within the device (not shown in the figure) or externally connected to the device to provide corresponding functions. Input devices may include keyboards, mice, touchscreens, microphones, various sensors, etc., while output devices may include displays, speakers, vibrators, indicator lights, etc.

[0085] The communication interface 1040 is used to connect a communication module (not shown in the figure) to enable communication between this device and other devices. The communication module can communicate via wired means (such as USB, Ethernet cable, etc.) or wireless means (such as mobile network, WIFI, Bluetooth, etc.).

[0086] Bus 1050 includes a pathway for transmitting information between various components of the device, such as processor 1010, memory 1020, input / output interface 1030, and communication interface 1040.

[0087] It should be noted that although the above-described device only shows the processor 1010, memory 1020, input / output interface 1030, communication interface 1040, and bus 1050, in specific implementations, the device may also include other components necessary for normal operation. Furthermore, those skilled in the art will understand that the above-described device may only include the components necessary for implementing the embodiments of this specification, and not necessarily all the components shown in the figures.

[0088] The electronic device described above is used to implement the method for predicting the wear amount of the constant cross-section disc cutter of the hard rock tunnel boring machine in any of the foregoing embodiments, and has the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0089] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a non-transitory computer-readable storage medium storing computer instructions for causing the computer to execute the method for predicting the wear amount of a constant cross-section disc cutter in a hard rock tunnel boring machine as described in any of the above embodiments.

[0090] The computer-readable medium of this embodiment includes permanent and non-permanent, removable and non-removable media, and information storage can be implemented by any method or technology. Information can be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, CD-ROM, digital versatile optical disc (DVD) or other optical storage, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transfer medium that can be used to store information accessible by a computing device.

[0091] The computer instructions stored in the storage medium of the above embodiments are used to cause the computer to execute the method for predicting the wear amount of the constant cross-section disc cutter of the hard rock tunnel boring machine as described in any of the above embodiments, and have the beneficial effects of the corresponding method embodiments, which will not be repeated here.

[0092] Based on the same inventive concept, corresponding to the methods of any of the above embodiments, this application also provides a hard rock tunnel boring machine, including a predictive device for the wear amount of the constant cross-section disc cutter of the hard rock tunnel boring machine as described above, and / or an electronic device as described above, and / or a non-transitory computer-readable storage medium as described above; since the hard rock tunnel boring machine includes at least one of the above-mentioned predictive device, electronic device and non-transitory computer-readable storage medium, the hard rock tunnel boring machine has the advantages and beneficial effects mentioned in any of the above embodiments.

[0093] Those skilled in the art should understand that the discussion of any of the above embodiments is merely exemplary and is not intended to imply that the scope of this application (including the claims) is limited to these examples; under the concept of this application, the technical features of the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the embodiments of this application as described above, which are not provided in detail for the sake of brevity.

[0094] Additionally, to simplify the description and discussion, and to avoid obscuring the embodiments of this application, the well-known power / ground connections to integrated circuit (IC) chips and other components may or may not be shown in the provided drawings. Furthermore, the apparatus may be illustrated in block diagram form to avoid obscuring the embodiments of this application, and this also takes into account the fact that the details of implementation of these block diagram apparatuses are highly dependent on the platform on which the embodiments of this application will be implemented (i.e., these details should be fully understood by those skilled in the art). While specific details (e.g., circuits) have been set forth to describe exemplary embodiments of this application, it will be apparent to those skilled in the art that the embodiments of this application can be implemented without these specific details or with variations thereof. Therefore, these descriptions should be considered illustrative rather than restrictive.

[0095] Although this application has been described in conjunction with specific embodiments thereof, many substitutions, modifications, and variations of these embodiments will be apparent to those skilled in the art from the foregoing description. For example, other memory architectures (e.g., dynamic RAM (DRAM)) may be used with the embodiments discussed.

[0096] The embodiments of this application are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the embodiments of this application should be included within the protection scope of this application.

Claims

1. A method for predicting the wear of a disc cutter head on a hard rock tunnel boring machine, wherein the cutterhead of the tunnel boring machine is equipped with multiple disc cutters, characterized in that... The prediction method includes: The tunneling parameters of the tunneling machine are obtained, and the cutting coefficient of the tunneling machine is calculated based on the tunneling parameters and preset tunneling machine structural parameters. The tunneling parameters include cutterhead thrust and cutterhead torque; the preset tunneling machine structural parameters include the number of disc cutters on the cutterhead and the installation radius of the disc cutters on the cutterhead. The calculation of the cutting coefficient of the tunneling machine is also included, based on the tunneling parameters and the preset tunneling machine structural parameters, according to the following formula. （1）， in, CC Let be the cutting coefficient of the tunneling machine. N The number of disc hobs on the cutter head. r i The mounting radius of any of the disc hobs on the cutter head is [missing information]. For the cutter head N The sum of the installation radii of the aforementioned disc hobs, T r The cutterhead torque of the tunneling machine is... T h The thrust of the cutterhead of the tunneling machine; The target disc cutter head is identified, and the construction rock mass information is obtained. Based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information, the rolling and sliding distance of the target disc cutter head per unit time is calculated. The tunneling parameters of the tunneling machine include the cutting depth and cutterhead rotation speed; the preset tunneling machine structural parameters include the radius of the target disc cutter head and its installation radius on the cutterhead; the construction rock mass information includes the friction coefficient of the construction rock mass, and includes: based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information, the rolling and sliding distance of the target disc cutter head per unit time is calculated according to the following formula. （2）， （3）， in, R The radius of the target disc hob is... k This is a coefficient corresponding to the radius of the target disc hob. l i The target disc hob's rolling and sliding distance per unit time. p a This refers to the cutting depth of the tunneling machine during the rock-breaking process. R s The installation radius of the target disc hob on the cutter head is given. n The cutterhead rotation speed of the tunneling machine. μ The friction coefficient of the rock mass under construction; Based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information, the contact stress of the target disc cutter acting on the contact arc surface during rock breaking is calculated. The preset tunneling machine structural parameters include the cutter spacing between adjacent disc cutters and the cutting edge width of the target disc cutter. The construction rock mass information includes the uniaxial compressive strength, tensile strength, joint angle, and joint spacing of the construction rock mass. Furthermore, based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information, the contact stress of the target disc cutter acting on the contact arc surface during rock breaking is calculated using the following formula. （4）， in, P c The contact stress exerted on the contact arc surface by the target disc cutter during rock breaking is the [missing information]. S The distance between adjacent disc hobs on the cutter head. b The cutting edge width of the target disc hob. σ c The uniaxial compressive strength of the rock mass under construction. σ t The tensile strength of the rock mass under construction. J α The joint angle of the rock mass under construction. J S The joint spacing of the rock mass under construction; where, when J S The maximum value is 400 mm At that time, it was used to represent a complete rock mass; The weight wear of the target disc cutter per unit time is calculated based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass. A target time period is determined, and the total weight wear of the target disc hob within the target time period is calculated based on the weight wear of the target disc hob per unit time.

2. The method for predicting the wear of a constant-section disc cutter in a hard rock tunnel boring machine according to claim 1, characterized in that, The information on the construction rock mass also includes: the abrasion index of the construction rock mass. The calculation of the weight wear of the target disc cutter per unit time based on the rolling slip distance of the target disc cutter per unit time, the contact stress acting on the contact arc surface during rock breaking, and the information of the construction rock mass includes: Based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress exerted by the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass, the weight wear of the target disc cutter per unit time is calculated according to the following formula. （5）， in, W i The weight wear of the target disc hob per unit time. A r The abrasion index of the rock mass under construction. λ, α , β and γ All are constants. α , β and γ All results were obtained using standard ring-block wear simulation test methods. λ These are coefficient constants obtained by fitting the standard ring block wear simulation test data and then correcting them based on the linear cutting experiments of the disc cutter and hard rock.

3. The method for predicting the wear of a constant-section disc cutter in a hard rock tunnel boring machine according to claim 2, characterized in that, The step of calculating the total weight wear of the target disc hob within the target time period based on the weight wear of the target disc hob per unit time includes: Based on the weight wear of the target disc hob per unit time, the total weight wear of the target disc hob within the target time period is calculated according to the following formula. （6）， in, W iz The total weight wear of the target disc hob during the target time period. W iT For the first T The weight wear of the target disc hob per unit time. M The unit time is the quantity of time, and the target time period is the effective working time period of the tunnel boring machine during tunnel excavation.

4. A device for predicting the wear of a constant-section disc cutter in a hard rock tunnel boring machine, characterized in that, include: The first acquisition module is used to acquire the tunneling parameters of the tunneling machine, and calculate the cutting coefficient of the tunneling machine based on the tunneling parameters and preset tunneling machine structural parameters. The tunneling parameters include cutterhead thrust and cutterhead torque; the preset tunneling machine structural parameters include the number of disc cutters on the cutterhead and the installation radius of the disc cutters on the cutterhead. The module further includes: calculating the cutting coefficient of the tunneling machine according to the following formula based on the tunneling parameters and the preset tunneling machine structural parameters. （1）， in, CC Let be the cutting coefficient of the tunneling machine. N The number of disc hobs on the cutter head. r i The mounting radius of any of the disc hobs on the cutter head is [missing information]. For the cutter head N The sum of the installation radii of the aforementioned disc hobs, T r The cutterhead torque of the tunneling machine is... T h The thrust of the cutterhead of the tunneling machine; The first calculation module is used to determine the target disc cutter head, acquire the construction rock mass information, and calculate the rolling and sliding distance of the target disc cutter head per unit time based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. The tunneling parameters of the tunneling machine include the cutting depth and cutterhead rotation speed; the preset tunneling machine structural parameters include the radius of the target disc cutter head and the installation radius of the target disc cutter head on the cutterhead; the construction rock mass information includes the friction coefficient of the construction rock mass, and includes: calculating the rolling and sliding distance of the target disc cutter head per unit time according to the following formula based on the cutting coefficient, the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. （2）， （3）， in, R The radius of the target disc hob is... k This is a coefficient corresponding to the radius of the target disc hob. l i The target disc hob's rolling and sliding distance per unit time. p a This refers to the cutting depth of the tunneling machine during the rock-breaking process. R s The installation radius of the target disc hob on the cutter head is given. n The cutterhead rotation speed of the tunneling machine. μ The friction coefficient of the rock mass under construction; The second calculation module is used to calculate the contact stress of the target disc cutter acting on the contact arc surface during rock breaking based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. The preset tunneling machine structural parameters include the cutter spacing between adjacent disc cutters and the cutting edge width of the target disc cutter. The construction rock mass information includes the uniaxial compressive strength, tensile strength, joint angle, and joint spacing of the construction rock mass. The module also includes: calculating the contact stress of the target disc cutter acting on the contact arc surface during rock breaking according to the following formula, based on the tunneling parameters of the tunneling machine, the preset tunneling machine structural parameters, and the construction rock mass information. （4）, in, P c The contact stress exerted on the contact arc surface by the target disc cutter during rock breaking is the [missing information]. S The distance between adjacent disc hobs on the cutter head. b The cutting edge width of the target disc hob. σ c The uniaxial compressive strength of the rock mass under construction. σ t The tensile strength of the rock mass under construction. J α The joint angle of the rock mass under construction. J S The joint spacing of the rock mass under construction; where, when J S The maximum value is 400 mm At that time, it was used to represent a complete rock mass; The third calculation module is used to calculate the weight wear of the target disc cutter per unit time based on the rolling and sliding distance of the target disc cutter per unit time, the contact stress of the target disc cutter on the contact arc surface during rock breaking, and the information of the construction rock mass. The fourth calculation module is used to determine the target time period and calculate the total weight wear of the target disc hob within the target time period based on the weight wear of the target disc hob per unit time.

5. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements the method as described in any one of claims 1 to 4.

6. A non-transitory computer-readable storage medium storing computer instructions, characterized in that, The computer instructions are used to cause the computer to perform the method according to any one of claims 1 to 4.

7. A hard rock tunnel boring machine, characterized in that, It includes the device for predicting the wear of the disc cutter of a hard rock tunnel boring machine with a constant cross-section as described in claim 4, and / or the electronic device as described in claim 5, and / or the non-transitory computer-readable storage medium as described in claim 6.

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