Abrasive jet tunneling efficiency and surrounding rock deformation evaluation method and system

Abstract

The invention relates to an abrasive jet tunneling efficiency and surrounding rock deformation evaluation method and system, and the method comprises the steps: S1, building an abrasive jet rock breaking consumption model, and quantitatively representing the abrasive jet consumption in unit time; establishing a tunnel contour line mapping function; s2, establishing a rock breaking efficiency evaluation model to quantitatively represent rock breaking efficiency, and establishing a relation model between the cutting depth and the overall deformation of the contour line; s3, establishing an excavation efficiency evaluation model and a contour line local deformation evaluation model; s4, jet parameters and an excavation method adjusting strategy are determined; determining a contour line deformation amount and a nozzle angle adjustment strategy; and S5, establishing a jet flow working condition and surrounding rock deformation database under different lithology, and quantitatively representing the influence of the jet flow working condition on surrounding rock deformation. The jet efficiency is improved, and the engineering cost is reduced.

Description

Technical Field

[0001] The invention relates to underground tunnel engineering, and in particular to an abrasive jet tunneling efficiency and surrounding rock deformation evaluation method and system. Background Art

[0002] With the rapid development of infrastructure construction in my country, the scale and number of tunnel and underground projects have ranked first in the world. Especially driven by the Sichuan-Tibet Railway, South-to-North Water Diversion Project and other national super-difficult projects, the construction volume of tunnels, urban subways and underground space projects has increased year by year. These projects often need to pass through complex and changeable strata, especially in the excavation and advancement of hard strata, and face many challenges.

[0003] Traditional rock construction methods, such as drilling and blasting, cantilever excavation, and TBM, have many shortcomings when dealing with hard strata. For example, the drilling and blasting method has large vibrations, which seriously damages the surrounding rock and has a great impact on urban structures and residents; the cantilever excavation method has low excavation efficiency and high construction costs; the TBM method has the problem of severe tool wear. Therefore, exploring new excavation methods to improve excavation efficiency, reduce construction costs, and reduce the impact on the surrounding environment has become an important topic in the current field of tunnel and underground engineering technology.

[0004] In recent years, high-pressure abrasive water jet tunneling has attracted widespread attention due to its high efficiency and environmental protection. This method uses high-pressure water flow to carry abrasive particles to cut rocks, and has the advantages of fast cutting speed and little damage to the surrounding rock.

[0005] However, the existing tunnel excavation method based on high-pressure abrasive jet rock cutting still has some shortcomings:

[0006] 1) No method for optimizing jetting conditions under different lithological conditions is provided, which may result in low jet cutting efficiency;

[0007] 2) The deformation of the surrounding rock caused by the change of jet cutting depth is not taken into account. The undercut caused by the surrounding rock deformation will increase the project cost;

[0008] 3) No calculation method for excavation efficiency is provided. For sections of different sizes, the cutting path changes and the excavation efficiency cannot be quantified.

[0009] Therefore, it is necessary to develop a method and system for evaluating the abrasive jet tunneling efficiency and surrounding rock deformation. Summary of the invention

[0010] The purpose of the present invention is to provide a method and system for evaluating the tunneling efficiency and surrounding rock deformation of an abrasive jet, which can realize the optimization of the jet working conditions under different rock conditions, improve the jet efficiency, and quantify the excavation efficiency under different cutting paths; finally, combined with the surrounding rock deformation under different cutting depths, nozzle adjustment measures are proposed to more accurately control over-excavation and under-excavation and reduce engineering costs.

[0011] In order to achieve the above object, the present invention adopts the following technical solution:

[0012] In a first aspect, a method for evaluating the tunneling efficiency and surrounding rock deformation of an abrasive jet according to the present invention comprises the following steps:

[0013] S1, establishing an abrasive jet rock breaking consumption model, which quantitatively characterizes the abrasive jet consumption per unit time by introducing pump pressure, abrasive density, total jet mass, abrasive volume concentration, flow coefficient and nozzle diameter;

[0014] Establishing a tunnel contour mapping function, wherein the tunnel contour mapping function represents the tunnel contour using a mathematical function;

[0015] S2, establishing a rock breaking efficiency evaluation model, which quantitatively characterizes the rock breaking efficiency, that is, the cutting ability of the current jet working condition, by introducing the nozzle traverse speed, surrounding rock characteristics and cutting depth;

[0016] Establishing a relationship model between cutting depth and overall deformation of contour line, wherein the relationship model between cutting depth and overall deformation of contour line is achieved by measuring deformation after cutting the contour line and establishing a relationship function between each point of the contour line and the overall deformation of the contour line;

[0017] S3, establishing an excavation efficiency evaluation model, which quantitatively characterizes the excavation efficiency of the current excavation method by introducing the total length of the cutting path and the volume of rock fall on the tunnel face after cutting;

[0018] A contour line local deformation evaluation model is established, which quantitatively characterizes the contour line local deformation by introducing the deformation of the upper boundary of the cutting contour and the deformation of the lower boundary of the contour.

[0019] S4, determining the jet parameters and excavation method strategy, specifically: determining the jet working condition and cutting path according to the rock breaking efficiency and excavation efficiency, so as to obtain the highest efficiency jet working condition and the excavation method with the highest excavation efficiency under the current rock properties;

[0020] The strategy for determining the angle and position of the nozzle is as follows: adjusting the angle and position of the nozzle based on the local deformation of the contour line and the cutting depth to accurately control the undercut of the contour line;

[0021] S5. Establish an evaluation method for jet cutting excavation efficiency and surrounding rock deformation. Specifically, based on jet working conditions, cutting depth, surrounding rock characteristics, overall deformation of contour lines and local deformation of contour lines, establish a database of corresponding relationships between jet working conditions, cutting depths and surrounding rock deformation under different rock types to quantitatively characterize the influence of jet working conditions on surrounding rock deformation.

[0022] Optionally, the abrasive jet rock breaking consumption model is determined by the following formula:

[0023]

[0024] In the formula, E t is the abrasive jet consumption, P is the pump pressure; ρ a is the abrasive density; m t is the total mass of the jet, ω a is the abrasive volume concentration; c is the flow coefficient; d is the nozzle diameter.

[0025] Optionally, the tunnel contour mapping function is determined by the following formula:

[0026]

[0027] Where ω(ζ) is the mapping function; k is a positive integer; m is the number of terms in the mapping function, which is determined according to the tunnel section size and ranges from 2 to 10; C k is the real coefficient of the kth term related to the tunnel section size, ζ is the conformal mapping plane, and the coordinates of the point on the ζ plane ζ=ξ+iη=ρe iθ , ξ is the vertical axis, η is the horizontal axis, i is the imaginary unit, the center of the upper dome arc is the origin, ρ is the radius of the unit circle, and θ is the angle between the ξ axis and the line connecting a point on the unit circle and the coordinate origin.

[0028] Optionally, the rock breaking efficiency evaluation model is determined by the following formula:

[0029]

[0030] In the formula, SE t is the rock breaking efficiency; A is the compensation coefficient, which is related to the rock properties and takes a value of 2 to 10. The greater the rock hardness, the higher the compensation coefficient; l is the cutting depth; v is the nozzle traverse speed.

[0031] Optionally, the relationship model between the cutting depth and the overall deformation of the contour line is to express each point on the tunnel contour line through a mathematical formula through the mapping function, wherein the overall deformation of the contour line is determined by the following formula:

[0032] y1=f(ρ,θ,l);

[0033] Where y1 is the overall deformation of the contour line.

[0034] Optionally, the excavation efficiency evaluation model is determined by the following formula:

[0035]

[0036] In the formula, S E is the excavation efficiency; V is the rockfall volume of the tunnel face after cutting; L is the total length of the cutting path. Optionally, the local deformation evaluation model of the contour line is specifically:

[0037] y2=a+b

[0038] Where y2 is the local deformation of the contour line; a is the deformation of the upper boundary of the contour line; and b is the deformation of the lower boundary of the contour line.

[0039] Optionally, the strategy for determining the jet parameters is:

[0040] The rock breaking efficiency evaluation model is used to calculate the rock breaking efficiency of the current jet working condition;

[0041] Conduct preliminary experiments on face cutting and determine the most efficient jetting conditions for the current rock conditions by comparing the rock breaking efficiency under different jetting conditions.

[0042] The strategy for determining the excavation method is:

[0043] According to the highest efficiency jet working condition obtained from the preliminary experiment of face cutting, the highest efficiency cutting depth under the current rock conditions is determined; the face is cut using the determined highest efficiency cutting depth, and the excavation method used for the current rock type is evaluated using the excavation efficiency evaluation model to obtain the excavation efficiency of the current cutting method.

[0044] Optionally, the angle and position of the nozzle are adjusted based on the local deformation of the contour line and the cutting depth, specifically:

[0045] The nozzle adjustment angle is determined based on the boundary deformation on the contour line and the cutting depth, which is determined by the following formula;

[0046]

[0047] Among them, β is the nozzle adjustment angle;

[0048] According to the deformation of the boundary on the contour line, the distance the nozzle moves upward is determined as

[0049] In the second aspect, an abrasive jet tunneling efficiency and surrounding rock deformation evaluation system described in the present invention includes a memory and a controller, wherein the memory stores a computer-readable program, and when the computer-readable program is called by the controller, it can execute the abrasive jet tunneling efficiency and surrounding rock deformation evaluation method described in the present invention.

[0050] Beneficial effects of the present invention:

[0051] 1. The present invention proposes to combine the high-pressure abrasive jet working condition with the cutting depth to achieve the optimization of high-efficiency jet working conditions under different rock types. Through efficiency calculation, the appropriate cutting depth under the rock type can be accurately determined, thereby avoiding blindly increasing the pump pressure and reducing the traverse speed for excessive pursuit of cutting depth, effectively controlling the jet consumption, and thus reducing the excavation cost.

[0052] 2. The present invention proposes an evaluation method for abrasive jet cutting excavation efficiency, which quantifies the excavation efficiency by the cutting path length and the rock fall volume, and considers the influence of different cross-sectional sizes and different cutting depths on the excavation efficiency. This evaluation method provides a powerful tool for optimizing the cutting path and improving the excavation efficiency.

[0053] 3. In addition, the present invention also proposes a surrounding rock deformation evaluation method based on high-pressure abrasive jet cutting. This method uses a mapping function to represent each point on the tunnel contour line, and combines the relationship between the cutting depth and the local deformation of the contour line to propose a nozzle adjustment method. This method can accurately control the under-excavation phenomenon of the contour line and improve the accuracy and safety of excavation. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 It is a flow chart of the jet cutting excavation efficiency and surrounding rock deformation evaluation method described in the embodiment of the present application.

[0055] Figure 2 It is a schematic diagram of the outline of the tunnel jet cutting described in the embodiment of the present application.

[0056] Figure 3 It is a schematic diagram of the morphology of the initial jet cutting slot described in the embodiment of the present application.

[0057] Figure 4 It is a schematic diagram of the deformation morphology of the initial jet cutting slot described in the embodiment of the present application.

[0058] Figure 5 It is a schematic diagram of the morphology of the jet cutting slot after the nozzle is adjusted as described in the embodiment of the present application.

[0059] Figure 6 It is a schematic diagram of the deformation morphology of the jet cutting slot after the nozzle is adjusted as described in the embodiment of the present application.

[0060] Figure 7 It is a structural schematic diagram of the jet cutting excavation efficiency and surrounding rock deformation evaluation system described in the embodiment of the present application.

[0061] In the figure, 1, surrounding rock, 2, cutting contour line, 3, tunnel face, 4, nozzle, 5, contour line boundary, 6, contour line lower boundary, 7, controller, 8, memory. DETAILED DESCRIPTION

[0062] The following will describe the embodiments of the present invention with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be understood that the preferred embodiments are only for illustrating the present invention, not for limiting the scope of protection of the present invention.

[0063] like Figure 1 As shown, in an embodiment of the present application, a method for evaluating the tunneling efficiency and surrounding rock deformation of an abrasive jet includes the following steps:

[0064] S1, establish an abrasive jet rock breaking consumption model, which quantitatively represents the abrasive jet consumption per unit time by introducing pump pressure, abrasive density, total jet mass, abrasive volume concentration, flow coefficient and nozzle diameter.

[0065] A tunnel contour mapping function is established, which represents the tunnel contour with a mathematical function so that each point on the contour can be described in subsequent steps.

[0066] S2, establish a rock breaking efficiency evaluation model, which quantitatively characterizes the rock breaking efficiency, that is, the cutting ability of the current jet working condition, by introducing the nozzle traverse speed, surrounding rock characteristics and cutting depth.

[0067] A relationship model between cutting depth and overall deformation of the contour line is established. The relationship model between cutting depth and overall deformation of the contour line is achieved by measuring the deformation after cutting the contour line 2 and establishing a relationship function between each point of the contour line and the deformation.

[0068] S3, establishing an excavation efficiency evaluation model, which quantitatively characterizes the excavation efficiency of the cutting method by introducing the total length of the cutting path and the volume of rock fall on the tunnel face after cutting.

[0069] A contour line local deformation evaluation module is established. The contour line local deformation evaluation model quantitatively characterizes the contour line local deformation by introducing the deformation of the lower boundary 5 of the cutting contour line and the deformation of the lower boundary 6 of the contour line, so as to provide data for the subsequent nozzle 4 adjustment.

[0070] S4, determine the strategy of jet parameters and excavation method, specifically: determine the jet working condition and cutting path according to the rock breaking efficiency and excavation efficiency, so as to obtain the highest efficiency jet working condition and the excavation method with the highest excavation efficiency under the current rock properties.

[0071] The strategy for determining the nozzle angle and position is as follows: adjusting the nozzle angle and position based on the local deformation of the contour line and the cutting depth to accurately control the undercut of the contour line.

[0072] S5. Establish an evaluation method for jet cutting excavation efficiency and surrounding rock deformation. Specifically, based on jet working conditions, cutting depth, surrounding rock characteristics, overall deformation of the contour line and local deformation of the contour line, establish a database of corresponding relationships between jet working conditions, cutting depth and surrounding rock deformation (including overall deformation of the contour line and local deformation of the contour line) under different rock types to quantitatively characterize the influence of jet working conditions on surrounding rock deformation.

[0073] In the embodiment of the present application, a method for evaluating the tunneling efficiency and surrounding rock deformation of an abrasive jet achieves multiple technical effects through the establishment of a series of models. Specifically, firstly, by establishing an abrasive jet rock breaking consumption model and introducing multiple key parameters (such as pump pressure, abrasive concentration, etc.), the method successfully achieves an accurate quantitative characterization of the abrasive jet consumption per unit time, which not only helps to optimize the jet working conditions, but also reduces unnecessary consumption, thereby reducing costs. Secondly, the rock breaking efficiency evaluation model comprehensively considers multiple factors such as the nozzle traverse speed, surrounding rock characteristics and cutting depth, and can comprehensively and accurately reflect the cutting ability of the current jet working conditions, which provides a solid scientific basis for further optimizing the jet working conditions and improving the rock breaking efficiency. Furthermore, by establishing a model for the relationship between the cutting depth and the overall deformation of the contour line and a model for evaluating the local deformation of the contour line, the method can achieve an accurate evaluation of the deformation of the contour line of the abrasive jet cutting tunnel. This function is of great significance for timely adjusting the nozzle angle and position, accurately controlling the under-excavation of the contour line, improving the excavation accuracy and ensuring the safety of construction. At the same time, the excavation efficiency evaluation model effectively quantitatively characterizes the efficiency of the current excavation method by introducing parameters such as the total length of the cutting path and the volume of rockfall on the face after cutting, which provides strong support for optimizing the cutting path and further improving the excavation efficiency. Finally, this method also innovatively establishes a database of the corresponding relationship between the jetting conditions, cutting depth and surrounding rock deformation under different lithologies. This database can quantitatively characterize the influence of the jetting conditions on the surrounding rock deformation, providing reliable and comprehensive data support for the parameter selection and adjustment in subsequent excavation operations.

[0074] In a possible embodiment, the abrasive jet rock breaking consumption model is determined by the following formula:

[0075]

[0076] In the formula, E t is the abrasive jet consumption; P is the pump pressure, in MPa; ρ a is the abrasive density, in kg / m 3 ;m t is the total mass of the jet, in kg; ω a is the abrasive volume concentration; c is the flow coefficient; d is the nozzle diameter, in m.

[0077] In a possible embodiment, the tunnel contour mapping function is determined by the following formula:

[0078]

[0079] Where ω(ζ) is the mapping function; k is a positive integer; m is the number of terms in the mapping function, which is determined according to the tunnel section size and ranges from 2 to 10; C k is the real coefficient of the kth term related to the tunnel section size, ζ is the conformal mapping plane, and the coordinates of the point on the ζ plane ζ=ξ+iη=ρe iθ , ξ is the vertical axis, η is the horizontal axis, i is the imaginary unit, the center of the upper dome arc is the origin, ρ is the radius of the unit circle, and θ is the angle between the line connecting a point on the unit circle and the origin of the coordinate system and the ξ axis, as shown in Figure 2 shown.

[0080] In a possible embodiment, the rock breaking efficiency evaluation model is determined by the following formula:

[0081]

[0082] In the formula, SE t is the rock breaking efficiency; A is the compensation coefficient, which is related to the rock properties and takes a value of 2 to 10. The greater the rock hardness, the higher the compensation coefficient; l is the cutting depth in m; v is the nozzle traverse speed in m / h.

[0083] In a possible embodiment, the relationship model between the cutting depth and the overall deformation of the contour line is to express each point on the tunnel contour line through a mathematical formula through a mapping function, wherein the overall deformation of the contour line is determined by the following formula:

[0084] y1=f(ρ,θ,l)

[0085] Where y1 is the overall deformation of the contour line.

[0086] In a possible embodiment, the excavation efficiency evaluation model is determined by the following formula:

[0087]

[0088] In the formula, S E is the excavation efficiency; V is the rockfall volume of the face after cutting, in m 3 ; L is the total length of the cutting path, in meters.

[0089] In a possible embodiment, the contour line local deformation evaluation model is specifically:

[0090] y2=a+b

[0091] Where y2 is the local deformation of the contour line, a is the deformation of the upper boundary of the contour line, and b is the deformation of the lower boundary of the contour line.

[0092] In a possible embodiment, Figure 3 The figure shows the morphology of the first jet cutting slot.

[0093] In a possible embodiment, the jet parameter adjustment strategy is:

[0094] The rock breaking efficiency evaluation model is used to calculate the rock breaking efficiency of the current jet working condition. A pre-experiment of tunnel face cutting is carried out to determine the most efficient jet working condition under the current rock conditions by comparing the rock breaking efficiency under different jet working conditions. The pre-experiment of tunnel face cutting is specifically as follows:

[0095] Select the rock-level area in the working face and set the jet working parameters, which include pump pressure, abrasive density and nozzle lateral speed; carry out transverse cutting and longitudinal cutting respectively; gradually increase the pump pressure and abrasive density, reduce the nozzle lateral speed, carry out multiple cuttings, and measure the cutting depth of each cutting path; calculate the highest-efficiency jet working condition for the current rock conditions through the abrasive jet rock breaking consumption model and the rock breaking efficiency evaluation model.

[0096] In a possible embodiment, the excavation method adjustment strategy is:

[0097] According to the highest efficiency jet working condition obtained from the preliminary experiment of face cutting, the highest efficiency cutting depth under the current lithological conditions is determined (in the process of the preliminary experiment of face cutting, the corresponding cutting depth under each efficiency jet working condition can be obtained. When the highest efficiency jet working condition under the current lithological conditions is determined, the cutting depth corresponding to the highest efficiency jet working condition can be determined). The determined highest efficiency cutting depth is used to perform cutting operation on the face 3, and the excavation efficiency evaluation model is used to evaluate the efficiency of the currently used excavation method to obtain the excavation efficiency of the current cutting method.

[0098] Due to the influence of rock properties and cutting depth, the cutting contour line 2 is prone to uneven deformation, that is, the external deformation is greater than the internal deformation. The deformation morphology of the initial jet cutting slot is shown in Figure 4 .

[0099] In order to control the undercut of the contour line, it is necessary to adjust the nozzle angle and cutting position to ensure that the contour line is flat after cutting deformation. Among them, adjusting the nozzle angle is specifically:

[0100] The nozzle adjustment angle is determined based on the boundary deformation on the contour line and the cutting depth, which is determined by the following formula;

[0101]

[0102] Where β is the nozzle adjustment angle.

[0103] Then, the distance the nozzle moves upward is determined according to the deformation of the boundary on the contour line:

[0104] like Figure 6 As shown, the deformation morphology of the jet cutting slot after the nozzle 4 is adjusted.

[0105] like Figure 5 As shown, the morphology of the jet cutting slot after the nozzle 4 is adjusted.

[0106] In a possible embodiment, the excavation efficiency and surrounding rock deformation evaluation method can determine the jetting condition and excavation efficiency of the current surrounding rock 1 based on the above content, and propose a corresponding nozzle 4 adjustment strategy corresponding to the overall deformation and local deformation of each point on the contour line to accurately control the under-excavation of the surrounding rock 1.

[0107] like Figure 7 As shown, in an embodiment of the present application, an abrasive jet tunneling efficiency and surrounding rock deformation evaluation system includes a memory and a controller, wherein the memory stores a computer-readable program, and when the computer-readable program is called by the controller, it can execute the abrasive jet tunneling efficiency and surrounding rock deformation evaluation method as described in the embodiment of the present application.

[0108] The above embodiments are only preferred embodiments for fully illustrating the present invention, and the protection scope of the present invention is not limited thereto. Any equivalent substitution or change made by a person skilled in the art based on the present invention is within the protection scope of the present invention.

Claims

1. A method for evaluating the tunneling efficiency and surrounding rock deformation of abrasive jets, characterized in that: The steps include: S1, establishing an abrasive jet rock breaking consumption model, which quantitatively characterizes the abrasive jet consumption per unit time by introducing pump pressure, abrasive density, total jet mass, abrasive volume concentration, flow coefficient and nozzle diameter; Establishing a tunnel contour mapping function, wherein the tunnel contour mapping function represents the tunnel contour using a mathematical function; S2, establishing a rock breaking efficiency evaluation model, which quantitatively characterizes the rock breaking efficiency, that is, the cutting ability of the current jet working condition, by introducing the nozzle traverse speed, surrounding rock characteristics and cutting depth; Establishing a relationship model between cutting depth and overall deformation of contour line, wherein the relationship model between cutting depth and overall deformation of contour line is achieved by measuring deformation after cutting the contour line and establishing a relationship function between each point of the contour line and the overall deformation of the contour line; S3, establishing an excavation efficiency evaluation model, which quantitatively characterizes the excavation efficiency of the current excavation method by introducing the total length of the cutting path and the volume of rock fall on the tunnel face after cutting; A contour line local deformation evaluation model is established, which quantitatively characterizes the contour line local deformation by introducing the deformation of the upper boundary of the cutting contour and the deformation of the lower boundary of the contour. S4, determining the jet parameters and excavation method strategy, specifically: determining the jet working condition and cutting path according to the rock breaking efficiency and excavation efficiency, so as to obtain the highest efficiency jet working condition and the excavation method with the highest excavation efficiency under the current rock properties; The strategy for determining the angle and position of the nozzle is as follows: adjusting the angle and position of the nozzle based on the local deformation of the contour line and the cutting depth to accurately control the undercut of the contour line; S5. Establish an evaluation method for jet cutting excavation efficiency and surrounding rock deformation. Specifically, based on jet working conditions, cutting depth, surrounding rock characteristics, overall deformation of contour lines and local deformation of contour lines, establish a database of corresponding relationships between jet working conditions, cutting depths and surrounding rock deformation under different rock types to quantitatively characterize the influence of jet working conditions on surrounding rock deformation.

2. The abrasive jet tunneling efficiency and surrounding rock deformation evaluation method according to claim 1, characterized in that: The abrasive jet rock breaking consumption model is determined by the following formula: In the formula, E t is the abrasive jet consumption, P is the pump pressure; ρ a is the abrasive density; m t is the total mass of the jet, ω a is the abrasive volume concentration; c is the flow coefficient; d is the nozzle diameter.

3. The method for evaluating the tunneling efficiency and surrounding rock deformation of abrasive jet according to claim 2, characterized in that: The tunnel contour mapping function is determined by the following formula: Where ω(ζ) is the mapping function; k is a positive integer; m is the number of terms in the mapping function, which is determined according to the tunnel section size and ranges from 2 to 10; Ck is the real coefficient of the kth term related to the tunnel section size, ζ is the conformal mapping plane, and the coordinates of the point on the ζ plane are ζ=ξ+iη=ρe iθ , ξ is the vertical axis, η is the horizontal axis, i is the imaginary unit, the center of the upper dome arc is the origin, ρ is the radius of the unit circle, and θ is the angle between the ξ axis and the line connecting a point on the unit circle and the coordinate origin.

4. The abrasive jet tunneling efficiency and surrounding rock deformation evaluation method according to claim 2, characterized in that: The rock breaking efficiency evaluation model is determined by the following formula: Where, SE t is the rock breaking efficiency; A is the compensation coefficient, which is related to the rock properties and takes a value of 2 to 10. The greater the rock hardness, the higher the compensation coefficient; l is the cutting depth; v is the nozzle traverse speed.

5. The method for evaluating the tunneling efficiency and surrounding rock deformation of abrasive jet according to claim 4, characterized in that: The relationship model between cutting depth and overall deformation of the contour line is to express each point on the tunnel contour line through a mathematical formula through the mapping function, wherein the overall deformation of the contour line is determined by the following formula: y1=f(ρ,θ,l); Where y1 is the overall deformation of the contour line.

6. The abrasive jet tunneling efficiency and surrounding rock deformation evaluation method according to claim 1, characterized in that: The excavation efficiency evaluation model is determined by the following formula: In the formula, S E is the excavation efficiency; V is the rockfall volume on the face after cutting; L is the total length of the cutting path.

7. The method for evaluating the tunneling efficiency and surrounding rock deformation of abrasive jet according to claim 4, characterized in that: The local deformation evaluation model of the contour line is specifically: y2=a+b Where y2 is the local deformation of the contour line; a is the deformation of the upper boundary of the contour line; and b is the deformation of the lower boundary of the contour line.

8. The method for evaluating the tunneling efficiency and surrounding rock deformation of abrasive jet according to claim 7, characterized in that: The strategy for determining the jet parameters is: The rock breaking efficiency evaluation model is used to calculate the rock breaking efficiency of the current jet working condition; Conduct preliminary experiments on face cutting and determine the most efficient jetting conditions for the current rock conditions by comparing the rock breaking efficiency under different jetting conditions. The strategy for determining the excavation method is: According to the highest efficiency jet working condition obtained from the preliminary experiment of face cutting, the highest efficiency cutting depth under the current rock conditions is determined; the face is cut using the determined highest efficiency cutting depth, and the excavation method used for the current rock type is evaluated using the excavation efficiency evaluation model to obtain the excavation efficiency of the current cutting method.

9. The method for evaluating the tunneling efficiency and surrounding rock deformation of abrasive jet according to claim 7, characterized in that: Adjust the angle and position of the nozzle based on the local deformation of the contour line and the cutting depth, specifically: The nozzle adjustment angle is determined based on the boundary deformation and cutting depth on the contour line, and is determined by the following formula; Among them, β is the nozzle adjustment angle; According to the deformation of the boundary on the contour line, the distance the nozzle moves upward is determined as 10. An abrasive jet tunneling efficiency and surrounding rock deformation evaluation system, characterized by: It comprises a memory and a controller, wherein the memory stores a computer-readable program, and when the computer-readable program is called by the controller, it can execute the abrasive jet tunneling efficiency and surrounding rock deformation evaluation method as claimed in any one of claims 1 to 9.

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