Tunnel construction blasting vibration safety checking method

Abstract

The invention provides a tunnel construction blasting vibration safety checking method. The method is applied to the technical field of tunnel construction blasting vibration safety checking and comprises the steps that tunnel construction blasting vibration safety pre-checking is carried out, and a blasting vibration particle peak value particle speed safety limit value is determined; establishing a blasting vibration safety check calculation numerical simulation model according to a blasting vibration particle peak particle velocity safety limit value, tunnel geological conditions and current blasting technical parameters; according to the blasting design parameters and the blasting vibration safety check calculation numerical simulation model, a blasting vibration mass point peak particle velocity calculation value is obtained through calculation; and checking the tunnel blasting vibration safety according to the blasting vibration particle peak particle velocity calculation value. In this way, the accuracy of tunnel construction blasting vibration safety checking can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel construction blasting vibration safety verification, and in particular to a tunnel construction blasting vibration safety verification method. Background Art

[0002] During tunnel construction, blasting vibration is an inevitable phenomenon. The shock waves and seismic waves generated by blasting will produce varying degrees of vibration effects on the tunnel and its surrounding soil, rock mass and adjacent buildings. During tunnel construction, if the intensity of blasting vibration exceeds the design safety standard, it will directly affect the stability of the tunnel structure. The vibration may cause cracks and displacement of the tunnel lining, or even partial or overall collapse. These problems not only affect the construction progress, but may also cause huge economic losses and casualties. By checking the blasting vibration, the structural safety of the tunnel under the action of blasting can be ensured, and potential safety hazards can be discovered in advance and adjusted. Tunnel construction is usually located in densely built environments such as cities and industrial areas. Blasting vibration may affect adjacent buildings, roads, bridges and other facilities. Excessive blasting vibration may cause cracks and deformation of buildings, and even affect the service life of infrastructure. By checking the blasting vibration, its impact on surrounding buildings and facilities can be evaluated, and appropriate shock reduction measures can be taken to avoid external damage caused by construction. Blasting vibration may also have negative effects on the surrounding environment, such as fluctuations in groundwater levels, damage to soil structures, and ground subsidence. Especially in areas with abundant groundwater, excessive vibration may The vibration safety check can evaluate these environmental impacts before construction and take effective technical measures to reduce environmental damage. Many countries and regions have clear regulations and restrictions on the intensity of blasting vibration, especially in urban environments, where the control of blasting vibration is particularly strict. For example, some cities stipulate that the vibration speed must not exceed a certain value during blasting. The purpose of these regulations is to protect the safety of buildings, transportation facilities and residents' lives and property. The blasting vibration check can ensure that the construction process complies with the requirements of laws and regulations and avoid penalties and disputes caused by violations of regulations. Excessive blasting vibration will not only affect the surrounding environment, but may also cause accidental damage to the tunnel structure during construction, increasing the cost of maintenance and rectification. By reasonably checking the blasting vibration, unnecessary excessive blasting can be reduced, vibration can be controlled within a reasonable range, construction efficiency can be improved, and delays and economic losses caused by construction safety issues can be avoided, thereby improving the economic benefits of the entire project. Therefore, the safety check of tunnel construction blasting vibration is of great significance.

[0003] At present, the traditional tunnel construction blasting vibration safety verification method adopts an overly simplified vibration propagation model, ignores the complexity and uncertainty of geological conditions, has low accuracy in blasting design parameters, has deviations in vibration attenuation laws, has limited numerical simulation accuracy, or lacks comprehensive monitoring data, resulting in low accuracy in tunnel construction blasting vibration safety verification. Summary of the invention

[0004] The present invention provides a tunnel construction blasting vibration safety verification method.

[0005] According to a first aspect of the present disclosure, a method for verifying the safety of blasting vibration during tunnel construction is provided. The method comprises:

[0006] Conduct tunnel construction blasting vibration safety pre-check to determine the peak particle velocity safety limit of blasting vibration particles;

[0007] A numerical simulation model for blasting vibration safety verification calculation is established based on the safety limit of the peak particle velocity of the blasting vibration particles, the tunnel geological conditions and the current blasting technical parameters;

[0008] According to the blasting design parameters and the numerical simulation model for blasting vibration safety verification calculation, a calculated value of the peak particle velocity of the blasting vibration particle is calculated; and the tunnel blasting vibration safety is verified according to the calculated value of the peak particle velocity of the blasting vibration particle;

[0009] If the calculated value of the blasting vibration particle peak velocity exceeds the blasting vibration particle peak velocity safety limit, the blasting design parameters are unqualified, and the blasting technical parameters are adjusted. The blasting vibration safety verification calculation numerical simulation model is updated according to the adjusted technical parameters.

[0010] Furthermore, the tunnel construction blasting vibration safety pre-check is performed to determine the safety limit of the peak particle velocity of the blasting vibration particles, including:

[0011] Based on the existing monitoring data of the tunnel blasting area to be verified, draw the corresponding blasting vibration particle peak particle velocity-frequency relationship curve;

[0012] According to the blasting vibration particle peak velocity-frequency relationship curve, a blasting vibration particle peak velocity-frequency relationship formula is obtained under the rock mass grade where the tunnel is located;

[0013] According to the blasting vibration particle peak particle velocity-frequency relationship formula, the blasting vibration particle peak particle velocity safety limit value is obtained.

[0014] Furthermore, the blasting vibration safety check calculation numerical simulation model is established according to the blasting vibration particle peak particle velocity safety limit, tunnel geological conditions and current blasting technical parameters, including:

[0015] According to the plane, elevation and cross-section of the tunnel line, a tunnel excavation face center axis, tunnel cross-section contour line and excavation face elevation are used to construct a tunnel excavation geometric model; according to the height of each step of the tunnel face and the linear position of each step excavation face, a three-dimensional geometric model of the tunnel face excavation is constructed; wherein the establishment size boundary range of the tunnel excavation geometric model and the three-dimensional geometric model of the tunnel face excavation is greater than or equal to 2.5 times the tunnel diameter of the outer contour of the tunnel contour size;

[0016] According to the rock mass strength grade near the tunnel, obtain the rock mass mechanical parameters corresponding to the tunnel rock mass material strength, elastic modulus and Poisson's ratio;

[0017] Conduct acoustic tests on the corresponding rock mass to obtain the corresponding acoustic parameters;

[0018] Determine the blasting design parameters based on the tunnel excavation geometry model, the three-dimensional geometry model of the tunnel face excavation, the actual tunnel blasting method and blasting equipment, peripheral holes, slot holes, auxiliary holes, the distance between peripheral holes, the distance between slot holes, the number of slot holes and the number of auxiliary holes;

[0019] A numerical simulation model for blasting vibration safety verification is established based on rock mass mechanical parameters, acoustic parameters and blasting design parameters.

[0020] Further: if the blasting design parameters are unqualified, adjust any one or any several parameters of the blasting hole depth, the slot hole arrangement depth, the slot hole arrangement form, the auxiliary hole hole depth, the auxiliary hole hole arrangement depth, the auxiliary hole hole arrangement form, the spacing between the auxiliary hole and the slot hole, or the auxiliary hole hole spacing.

[0021] Further: if the blasting design parameters are unqualified, any one or several parameters of the explosive type, peripheral eye charging form, slot eye charging form, auxiliary eye charging form, auxiliary eye charging amount, slot eye charging amount or auxiliary eye charging amount are adjusted.

[0022] Further: for the geometric model of tunnel excavation in soft surrounding rock, when establishing the geometric model of tunnel excavation, the geometric model of tunnel rock mass is divided by using hexahedral mesh;

[0023] For the hard rock tunnel geometry model, tetrahedral mesh is used to divide the tunnel rock geometry model;

[0024] Each hole and charging step is divided into triangular prism units. The unit size is set according to the size requirements of the tunnel excavation geometric model. The unit size is 15 to 20 times the diameter of the blasting hole.

[0025] According to a second aspect of the present disclosure, an electronic device is provided. The electronic device includes: a memory and a processor, wherein a computer program is stored in the memory, and the method is implemented when the processor executes the program.

[0026] According to a third aspect of the present disclosure, a computer-readable storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the method is implemented.

[0027] The present invention can provide scientific and reasonable safety guarantee for blasting design by determining the safety limit of the peak particle velocity of the blasting vibration particles, and combining the tunnel geological conditions and blasting technical parameters. The numerical simulation model can comprehensively consider the complex geological conditions and construction environment, and reflect the impact of the actual blasting on the surrounding environment, thereby reducing uncertainty and improving the accuracy of verification. By pre-verifying and adjusting the technical parameters, unnecessary losses and risks caused by excessive vibration afterwards are avoided, and the safety of tunnel construction and surrounding areas is guaranteed. By dynamically adjusting the blasting technical parameters, the blasting operation can be optimized to ensure that both the construction requirements are met and the influence of excessive vibration is avoided. The use of the numerical simulation model can simulate the vibration conditions under different parameter conditions, and provide the best solution for blasting design. In the case of excessive vibration, it can be corrected by adjusting the blasting parameters, avoiding blind adjustment and excessive maintenance. The conservative design improves the efficiency of blasting operations; by optimizing blasting parameters and checking vibration safety in advance, the maintenance costs and accident handling costs caused by excessive vibration in the later stage are avoided. Identifying potential problems in advance and taking measures can significantly reduce unnecessary losses; through numerical simulation, the blasting effect and vibration impact can be predicted more accurately, thereby avoiding excessive use of materials and unnecessary adjustments, and improving the cost-effectiveness of construction; through early safety checks and technical adjustments, the sudden risks of on-site construction can be reduced, and the foresight and control of project management can be improved. Through scientific calculations and simulation analysis, the controllability and transparency of blasting design are enhanced, which facilitates the project management team to effectively control various risks in the construction process; by optimizing blasting design, the interference with the surrounding ecological environment and residents' lives can be effectively reduced, reflecting the responsibility of engineering projects to the environment during construction.

[0028] It should be understood that the contents described in the summary of the invention are not intended to limit the key or important features of the embodiments of the present disclosure, nor are they intended to limit the scope of the present disclosure. Other features of the present disclosure will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above and other features, advantages and aspects of the embodiments of the present disclosure will become more apparent with reference to the following detailed description in conjunction with the accompanying drawings. The accompanying drawings are used to better understand the present solution and do not constitute a limitation of the present disclosure. In the accompanying drawings, the same or similar reference numerals represent the same or similar elements, wherein:

[0030] Figure 1 A flow chart of a tunnel construction blasting vibration safety verification method according to an embodiment of the present disclosure is shown;

[0031] Figure 2 A block diagram of an exemplary electronic device capable of implementing embodiments of the present disclosure is shown. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiments of the present disclosure clearer, the technical solution in the embodiments of the present disclosure will be clearly and completely described below in conjunction with the drawings in the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the embodiments in the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0033] In addition, the term "and / or" in this article is only a description of the association relationship between the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0034] Figure 1 A flow chart of a tunnel construction blasting vibration safety verification method according to an embodiment of the present disclosure is shown, and the method includes:

[0035] S101, conduct a preliminary check on the safety of tunnel construction blasting vibration to determine the safety limit of the peak particle velocity of the blasting vibration particles;

[0036] S102, establishing a numerical simulation model for blasting vibration safety verification calculation according to the blasting vibration particle peak particle velocity safety limit, tunnel geological conditions and current blasting technical parameters;

[0037] S103, calculating a calculated value of the peak particle velocity of a blasting vibration particle according to the blasting design parameters and the blasting vibration safety verification calculation numerical simulation model; verifying the tunnel blasting vibration safety according to the calculated value of the peak particle velocity of the blasting vibration particle;

[0038] S104, if the calculated value of the blasting vibration particle peak velocity exceeds the blasting vibration particle peak velocity safety limit, the blasting design parameters are unqualified, and the blasting technical parameters are adjusted, and the blasting vibration safety verification calculation numerical simulation model is updated according to the adjusted technical parameters.

[0039] In some embodiments, the tunnel construction blasting vibration safety pre-check and determination of the blasting vibration particle peak particle velocity safety limit include: drawing a corresponding blasting vibration particle peak particle velocity-frequency relationship curve based on existing monitoring data of the tunnel blasting area to be checked; obtaining a blasting vibration particle peak particle velocity-frequency relationship formula for the rock mass grade of the tunnel based on the blasting vibration particle peak particle velocity-frequency relationship curve; and obtaining the blasting vibration particle peak particle velocity safety limit based on the blasting vibration particle peak particle velocity-frequency relationship formula. According to the embodiment of the present disclosure, by analyzing the existing monitoring data of the tunnel blasting area to be verified, a relationship curve between the peak particle velocity of the blasting vibration particle and the vibration frequency is drawn, which can make full use of historical data, consider the blasting vibration characteristics under different geological conditions, and reveal the correlation between vibration and frequency through data analysis, so as to provide a scientific basis for subsequent safety assessment, overcome the limitation of relying only on standardized parameters in traditional blasting design, and more comprehensively and accurately evaluate the vibration impact under different geological conditions; based on the vibration particle peak particle velocity-frequency relationship curve, a blasting vibration particle peak particle velocity-frequency relationship formula suitable for different rock mass grades is derived, and the geological characteristics of each rock mass are determined. The geological characteristics of different rock masses will lead to differences in vibration propagation. Through precise formulas for different rock mass types, a tailor-made blasting vibration control strategy can be provided for tunnel construction, helping engineers to accurately predict the propagation effect of blasting vibration in the blasting design stage, avoiding inconsistent vibration responses due to geological differences during the construction process; through the safety limit of the peak particle velocity of the tunnel blasting vibration particle, this safety limit not only takes into account the bearing capacity of the tunnel structure itself, but also fully considers the safety of the surrounding environment. By comparing with the safety limit, construction personnel can monitor the blasting process in real time to ensure that the blasting vibration will not cause damage to the tunnel structure or the surrounding environment, reducing potential safety hazards.

[0040] For example, the tunnel is located in a typical rock mass. The geological conditions of the rock mass are hard granite. The construction area is a certain distance away from the surrounding buildings. In order to ensure that the blasting vibration does not have an adverse impact on the surrounding environment and structures, the construction party collected blasting vibration monitoring data, and these data include the peak particle velocity (PPV) of the particle point under different blasting parameters and different vibration frequencies; in the past blasting operations, multiple monitoring points were set up in the tunnel area, and blasting vibration data at different locations were collected. These data recorded the relationship between the peak particle velocity (PPV) of the particle point generated by the blasting vibration and the vibration frequency (the frequency range is usually 1Hz to 100Hz) (for example, the monitoring data shows that: at a distance from the tunnel At the monitoring point 50 meters away from the tunnel blasting point, the peak particle velocity of the blasting vibration is: low frequency band (1-10Hz): 0.4cm / s, medium frequency band (10-30Hz): 0.3cm / s, high frequency band (30-100Hz): 0.2cm / s; at the monitoring point 100 meters away from the tunnel blasting point, the relationship between vibration velocity and frequency may be different: low frequency band (1-10Hz): 0.2cm / s, medium frequency band (10-30Hz): 0.15cm / s, high frequency band (30-100Hz): 0.1cm / s; Based on the existing monitoring data, the peak particle velocity (PPV) of each monitoring point is paired with the vibration frequency to form a The data points are plotted on the coordinate axis, with the horizontal axis being the vibration frequency (Hz) and the vertical axis being the peak particle velocity (PPV) (in cm / s) (for example, for a monitoring point 50 meters away from the tunnel blasting point, the data points are: (1Hz, 0.4cm / s), (10Hz, 0.35cm / s), (30Hz, 0.25cm / s), (50Hz, 0.2cm / s), (100Hz, 0.15cm / s); for a monitoring point 100 meters away from the tunnel blasting point, the data points are: (1Hz, 0.2cm / s), (10Hz, 0.18cm / s), (30Hz, 0.1cm / s), ( 50Hz, 0.08cm / s), (100Hz, 0.05cm / s); these data points are plotted to obtain the peak particle velocity-frequency relationship curves of multiple monitoring points. The shape of the curve usually shows a trend that the vibration velocity gradually decreases with the increase of frequency; a formula for the relationship between the peak particle velocity of the blasting vibration particle under the rock mass grade is established. According to the above-drawn peak particle velocity-frequency relationship curve of the blasting vibration particle, a formula is obtained through regression analysis or fitting methods (such as linear regression, exponential regression, etc.) to express the relationship between the peak particle velocity of the blasting vibration particle in the tunnel area and the frequency. For example, after data analysis, the following fitting formula is obtained:

[0041] PPV(f)=0.5×f -0.6

[0042] Where PPV(f) is the peak particle velocity of the particle at a given frequency f (unit: cm / s), and f is the vibration frequency (unit: Hz). According to the safety standards for blasting vibration (such as building vibration limits, environmental vibration limits, etc.), different types of buildings and structures have different vibration safety limits. Common safety limits can be determined by referring to relevant specifications or standards. For example, for residential buildings, the usual safety limit is 0.5 cm / s (in the low frequency band, 1-10 Hz). If the safety of surrounding buildings is to be ensured, it is necessary to ensure that the peak particle velocity (PPV) of the blasting vibration does not exceed this limit. Based on the obtained formula for the relationship between the peak particle velocity and frequency, the peak particle velocity of the particle at different frequencies can be calculated and then compared with the safety limit. For example, if the frequency is 10 Hz, substituting into the formula yields: PPV(10) = 0.5 × 10 -0.6 ≈0.25cm / s; if the safety limit is 0.5cm / s, then at a frequency of 10Hz, the vibration intensity is lower than the safety limit and the construction is safe; if the frequency is 1Hz, substitute the formula to get: PPV(1)=0.5×1 -0.6 ≈0.5cm / s, at this time the vibration intensity is exactly equal to the safety limit, indicating that at a frequency of 1Hz, the vibration reaches the safety limit.

[0043] In some embodiments, the numerical simulation model for blasting vibration safety verification calculation is established according to the safety limit of the peak particle velocity of the blasting vibration particles, the tunnel geological conditions and the current blasting technical parameters, including: constructing a tunnel excavation geometry model according to the plane, elevation and cross-section of the tunnel line, using the central axis of the tunnel excavation face, the tunnel cross-section contour line and the excavation face elevation; constructing a three-dimensional geometric model of the tunnel face excavation according to the height of each step of the face and the linear position of the excavation face of each step; wherein the establishment size boundary range of the tunnel excavation geometry model and the three-dimensional geometric model of the tunnel face excavation is greater than or equal to the tunnel The outer contour of the tunnel profile is 2.5 times the tunnel diameter; according to the rock strength grade near the tunnel, the rock mechanical parameters corresponding to the tunnel rock material strength, elastic modulus and Poisson's ratio are obtained; acoustic tests are performed on the corresponding rock mass to obtain the corresponding acoustic parameters; the blasting design parameters are determined according to the tunnel excavation geometry model, the three-dimensional geometry model of the tunnel face excavation, the actual tunnel blasting method and blasting equipment, peripheral holes, groove holes, auxiliary holes, peripheral hole distances, groove hole distances, the number of groove holes and the number of auxiliary holes; according to the rock mechanical parameters, acoustic parameters and blasting design parameters, a numerical simulation model for blasting vibration safety verification is established. According to the embodiments of the present disclosure, by constructing a tunnel excavation geometry model and a tunnel face excavation three-dimensional geometry model, the shape and size of the tunnel and the face can be accurately depicted, providing a clear design basis for tunnel construction, ensuring the accurate execution of the excavation process, and reducing construction problems caused by design deviations; the size boundary of the model is designed to be greater than or equal to 2.5 times the tunnel diameter of the outer contour of the tunnel outline size. This design takes into account the safety range during the tunnel excavation process and ensures that during the blasting operation, possible blasting vibrations will not affect the safety of the tunnel surrounding environment. Through precise control of the boundaries, the solution can effectively reduce the impact of changes in geological conditions around the tunnel. ; By combining the mechanical parameters of the tunnel rock mass and the results of acoustic tests, the solution can quantify the physical properties of the rock mass around the tunnel. These mechanical and acoustic parameters provide accurate data support for subsequent blasting vibration analysis, which helps to more accurately predict the propagation and impact range of blasting vibration; by establishing a numerical simulation model for blasting vibration safety verification, it can simulate the impact of blasting vibration on the tunnel structure and surrounding environment, and simulate and predict different blasting scenarios. By analyzing the simulation results, engineers can promptly identify potential risk points and make optimization adjustments, effectively avoiding the problem of excessive vibration during blasting, and ensuring safety and environmental sustainability during tunnel construction.

[0044] For example, the geometric shape of the tunnel is determined based on the plan, elevation and cross-section of the tunnel. The shape of the tunnel is usually circular or elliptical. It is assumed that the cross-section of the tunnel in this project is circular with a diameter of 10 meters. The central axis of the tunnel excavation face is the tunnel line gradually excavated during the tunnel construction process. The axis is planned along the entire length of the tunnel and is sampled at regular intervals to obtain the geometric center point of the tunnel. According to the design of the tunnel, the cross-sectional contour line of the tunnel is drawn. This line defines the outer contour shape of the internal hollow part of the tunnel. It is assumed that the cross-section of the tunnel is a standard circle and the radius of the contour line is 5 meters. According to the construction location of the tunnel and the requirements of elevation control, the height of the excavation face is calibrated for each construction stage (for example: 10 meters underground when the excavation starts, and gradually sinks to 15 meters underground during the excavation process). Together, this information constitutes the geometric model of tunnel excavation. The tunnel face excavation adopts a step-by-step excavation method. For example, during the tunnel excavation process, the face is divided into 3 steps (with step heights of 5 meters, 4 meters and 3 meters respectively). These steps are used to determine the height of the excavation face at each construction stage. The step height and excavation face linear position can be accurately obtained by laser scanning or measuring tools, and reasonably arranged according to the excavation sequence of the steps; according to the excavation sequence of each step, the geometric shape of the excavation face of each step is drawn (for example, the excavation range of the first step is 10 meters in diameter, and the second step continues to be excavated within the first step, forming a step shape); combined with the excavation sequence and position of each step, a three-dimensional model of the tunnel face is generated using three-dimensional modeling software (such as AutoCAD, Revit, RockFlow, etc.), which will include the transition area between different steps, the shape of the steps and their contact surface with the rock mass; according to the geological exploration results of the rock mass around the tunnel, the mechanical parameters of the rock mass (such as strength, elastic modulus, Poisson's ratio, etc.) are obtained; the mechanical parameters of the rock mass are obtained by drilling, sampling, etc., and the compression strength, tensile strength, shear strength and other tests of the rock mass are carried out. Assuming that the tunnel is located in a granite area, its compression strength is 150MPa, the elastic modulus is 50GPa, and the Poisson's ratio is 0.25; By testing the acoustic wave velocity of the rock mass, the corresponding acoustic parameters (for example, P wave velocity and S wave velocity) are obtained. These data are helpful to predict the propagation law of blasting vibration, such as P wave velocity of 5000m / s and S wave velocity of 3000m / s; according to the actual blasting method of the tunnel, the blasting equipment used and other factors, the corresponding blasting parameters are designed, including: using conventional ammonium nitrate explosives or capsule-based explosives, adopting circular blasting, segmented blasting or multiple blasting, etc., determining the number and spacing of holes for blasting on each step, assuming that the blasting design of each step uses 10 peripheral holes, 5 slot holes, and 2 auxiliary holes; based on all the data obtained above (tunnel geometry model, rock mass mechanics and acoustic parameters, blasting design parameters, etc.), numerical simulation software (such as FLAC3D, ABAQUS, Dyna, etc.) is used to establish a blasting vibration safety verification model; the model will include the following key parts: rock mass mechanics model, blasting vibration model, vibration propagation analysis, and safety verification. .

[0045] In some embodiments, if the blasting design parameters are unqualified, any one or several parameters of the blasting hole depth, the slot hole arrangement depth, the slot hole arrangement form, the auxiliary hole hole depth, the auxiliary hole hole arrangement depth, the auxiliary hole hole arrangement form, the distance between the auxiliary hole and the slot hole, or the auxiliary hole hole spacing are adjusted. According to the embodiments of the present disclosure, by accurately setting the hole depth, the blasting energy can be more concentrated on the target rock formation, thereby achieving a better blasting effect and reducing the risk of excessive vibration; adjusting the slot hole arrangement depth can optimize the rock splitting effect and reduce the shock waves generated during the blasting process; by adjusting the arrangement of the slot holes, the accuracy and safety of the blasting can be effectively improved; by controlling its depth and arrangement, the stress distribution of the rock during the blasting process can be better controlled, the diffusion of the blasting wave can be reduced, and the vibration intensity of the main blasting area can be effectively reduced to avoid excessive vibration affecting the stability of the tunnel structure.

[0046] In some embodiments, if the blasting design parameters are unqualified, any one or several parameters including the type of explosives, the form of peripheral eye charge, the form of slotted eye charge, the form of auxiliary eye charge, the amount of auxiliary eye charge, the amount of slotted eye charge or the amount of auxiliary eye charge are adjusted. According to the embodiments of the present disclosure, by selecting a more adaptable type of explosive, the energy release rate of the blasting can be controlled. For harder rock formations, high explosives can be selected to ensure that the rocks can be effectively broken; for soft rock formations, low explosives can be used to avoid excessive vibration caused by over-blasting. By optimizing the types of explosives, not only the blasting efficiency can be improved, but also the impact on the surrounding environment can be reduced while meeting the construction requirements; by adjusting the explosive loading method, the distribution of the blasting wave can be optimized and the blasting accuracy can be improved; by adjusting the charging form of the peripheral eyes, the effect of the blasting can be better controlled and the potential harm to the tunnel wall and the surrounding environment can be reduced; by adjusting the charging amount and charging method of the groove eyes, the rock splitting effect can be optimized to avoid excessive vibration caused by excessive energy or incomplete blasting caused by insufficient energy. At the same time, a reasonable charging amount can avoid damage to the tunnel structure caused by blasting and ensure the safety of construction.

[0047] In some embodiments, for the soft surrounding rock tunnel excavation geometry model, when establishing the tunnel excavation geometry model, a hexahedral grid is used to divide the tunnel rock geometry model; for the hard rock tunnel geometry model, a tetrahedral grid is used to divide the tunnel rock geometry model; each hole and charging step is divided by a triangular prism unit, and the unit size is set according to the size requirements of the tunnel excavation geometry model, and the unit size is 15 to 20 times the diameter of the blasting hole.

[0048] According to the embodiments of the present disclosure, by determining the safe limit of the peak particle velocity of the blasting vibration particles, and combining the tunnel geological conditions and blasting technical parameters, it is possible to provide scientific and reasonable safety guarantees for blasting design. The numerical simulation model can comprehensively consider the complex geological conditions and construction environment, and reflect the impact of actual blasting on the surrounding environment, thereby reducing uncertainty and improving the accuracy of verification. By pre-verifying and adjusting the technical parameters, unnecessary losses and risks caused by excessive vibration afterwards are avoided, and the safety of tunnel construction and surrounding areas is guaranteed. By dynamically adjusting the blasting technical parameters, the blasting operation can be optimized to ensure that both the construction requirements are met and the influence of excessive vibration is avoided. The use of the numerical simulation model can simulate the vibration conditions under different parameter conditions, and provide the optimal solution for blasting design. In the case of excessive vibration, it can be corrected by adjusting the blasting parameters, avoiding blind adjustment and Overly conservative design improves the efficiency of blasting operations; by optimizing blasting parameters and checking vibration safety in advance, maintenance costs and accident handling costs caused by excessive vibration in the later stage are avoided. Identifying potential problems in advance and taking measures can significantly reduce unnecessary losses; through numerical simulation, blasting effects and vibration impacts can be predicted more accurately, thereby avoiding excessive use of materials and unnecessary adjustments, and improving construction cost-effectiveness; through early safety checks and technical adjustments, sudden risks in on-site construction can be reduced, and the foresight and control of project management can be improved. Through scientific calculations and simulation analysis, the controllability and transparency of blasting design are enhanced, which facilitates the project management team to effectively control various risks in the construction process; through optimizing blasting design, interference with the surrounding ecological environment and residents' lives can be effectively reduced, reflecting the responsibility of engineering projects to the environment during construction.

[0049] It should be noted that, for the aforementioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should be aware that the present disclosure is not limited by the order of the actions described, because according to the present disclosure, certain steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all optional embodiments, and the actions and modules involved are not necessarily required by the present disclosure.

[0050] According to an embodiment of the present disclosure, the present disclosure also provides an electronic device and a readable storage medium.

[0051] Figure 2A schematic block diagram of an electronic device that can be used to implement an embodiment of the present disclosure is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices, and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present disclosure described and / or required herein.

[0052] The electronic device includes a computing unit 201, which can perform various appropriate actions and processes according to a computer program stored in ROM 202 or a computer program loaded from a storage unit 208 into RAM 203. In RAM 203, various programs and data required for the operation of the electronic device can also be stored. The computing unit 201, ROM 202, and RAM 203 are connected to each other via a bus 204. An I / O interface 205 is also connected to the bus 204.

[0053] A number of components in the electronic device are connected to the I / O interface 205, including: an input unit 206, such as a keyboard, a mouse, etc.; an output unit 207, such as various types of displays, speakers, etc.; a storage unit 208, such as a disk, an optical disk, etc.; and a communication unit 209, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 209 allows the electronic device to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0054] The computing unit 201 may be a variety of general and / or special processing components with processing and computing capabilities. Some examples of the computing unit 201 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various computing units running machine learning model algorithms, digital signal processors (DSPs), and any appropriate processors, controllers, microcontrollers, etc. The computing unit 201 performs the various methods and processes described above, such as the tunnel construction blasting vibration safety verification method. For example, in some embodiments, the tunnel construction blasting vibration safety verification method may be implemented as a computer software program, which is tangibly contained in a machine-readable medium, such as a storage unit 208. In some embodiments, part or all of the computer program may be loaded and / or installed on an electronic device via ROM 202 and / or a communication unit 209. When the computer program is loaded into RAM 203 and executed by the computing unit 201, one or more steps of the tunnel construction blasting vibration safety verification method described above may be performed. Alternatively, in other embodiments, the computing unit 201 may be configured to execute the tunnel construction blasting vibration safety verification method in any other appropriate manner (eg, by means of firmware).

[0055] Various implementations of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), systems on chips (SOCs), load programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various implementations may include: being implemented in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0056] The program code for implementing the method of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general-purpose computer, a special-purpose computer, or other programmable data processing device, so that the program code, when executed by the processor or controller, enables the functions / operations specified in the flow chart and / or block diagram to be implemented. The program code may be executed entirely on the machine, partially on the machine, partially on the machine and partially on a remote machine as a stand-alone software package, or entirely on a remote machine or server.

[0057] In the context of the present disclosure, a readable storage medium may be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, device, or equipment. A readable storage medium may be a machine-readable signal medium or a machine-readable storage medium. A readable storage medium may include, but is not limited to, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, device, or device, or any suitable combination of the foregoing. More specific examples of readable storage media may include an electrical connection based on one or more lines, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0058] To provide interaction with a user, the systems and techniques described herein can be implemented on a computer having: a display device for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or trackball) through which the user can provide input to the computer. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0059] The systems and techniques described herein may be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or a web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system may be interconnected by any form or medium of digital data communication (e.g., a communications network). Examples of communications networks include: a local area network (LAN), a wide area network (WAN), and the Internet.

[0060] A computer system may include a client and a server. The client and the server are generally remote from each other and usually interact through a communication network. The relationship of client and server is generated by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, a server of a distributed system, or a server combined with a blockchain.

[0061] It should be understood that the above-mentioned various forms of processes can be used to reorder, add or delete steps. For example, the steps recorded in this disclosure can be executed in parallel, sequentially, or in different orders, as long as the desired results of the technical solution of this disclosure can be achieved, and this document does not limit this.

[0062] The above specific implementations do not constitute a limitation on the protection scope of the present disclosure. It should be understood by those skilled in the art that various modifications, combinations, sub-combinations and substitutions can be made according to design requirements and other factors. Any modification, equivalent substitution and improvement made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A tunnel construction blasting vibration safety verification method, characterized in that: include: Conduct tunnel construction blasting vibration safety pre-check to determine the peak particle velocity safety limit of blasting vibration particles; A numerical simulation model for blasting vibration safety verification calculation is established based on the safety limit of the peak particle velocity of the blasting vibration particles, the tunnel geological conditions and the current blasting technical parameters; According to the blasting design parameters and the numerical simulation model for blasting vibration safety verification calculation, a calculated value of the peak particle velocity of the blasting vibration particle is calculated; and the tunnel blasting vibration safety is verified according to the calculated value of the peak particle velocity of the blasting vibration particle; If the calculated value of the blasting vibration particle peak velocity exceeds the blasting vibration particle peak velocity safety limit, the blasting design parameters are unqualified, and the blasting technical parameters are adjusted. The blasting vibration safety verification calculation numerical simulation model is updated according to the adjusted technical parameters.

2. The tunnel construction blasting vibration safety verification method according to claim 1 is characterized in that: The tunnel construction blasting vibration safety pre-check is performed to determine the safety limit of the peak particle velocity of the blasting vibration particles, including: Based on the existing monitoring data of the tunnel blasting area to be verified, draw the corresponding blasting vibration particle peak particle velocity-frequency relationship curve; According to the blasting vibration particle peak velocity-frequency relationship curve, a blasting vibration particle peak velocity-frequency relationship formula is obtained under the rock mass grade where the tunnel is located; According to the blasting vibration particle peak particle velocity-frequency relationship formula, the blasting vibration particle peak particle velocity safety limit value is obtained.

3. The tunnel construction blasting vibration safety verification method according to claim 2 is characterized in that: The method of establishing a numerical simulation model for blasting vibration safety verification calculation based on the blasting vibration particle peak particle velocity safety limit, tunnel geological conditions and current blasting technical parameters includes: According to the plane, elevation and cross-section of the tunnel line, a tunnel excavation face center axis, tunnel cross-section contour line and excavation face elevation are used to construct a tunnel excavation geometric model; according to the height of each step of the tunnel face and the linear position of each step excavation face, a three-dimensional geometric model of the tunnel face excavation is constructed; wherein the establishment size boundary range of the tunnel excavation geometric model and the three-dimensional geometric model of the tunnel face excavation is greater than or equal to 2.5 times the tunnel diameter of the outer contour of the tunnel contour size; According to the rock mass strength grade near the tunnel, obtain the rock mass mechanical parameters corresponding to the tunnel rock mass material strength, elastic modulus and Poisson's ratio; Conduct acoustic tests on the corresponding rock mass to obtain the corresponding acoustic parameters; Determine the blasting design parameters based on the tunnel excavation geometry model, the three-dimensional geometry model of the tunnel face excavation, the actual tunnel blasting method and blasting equipment, peripheral holes, slot holes, auxiliary holes, the distance between peripheral holes, the distance between slot holes, the number of slot holes and the number of auxiliary holes; A numerical simulation model for blasting vibration safety verification is established based on rock mass mechanical parameters, acoustic parameters and blasting design parameters.

4. The tunnel construction blasting vibration safety verification method according to claim 3 is characterized by: If the blasting design parameters are unqualified, adjust any one or several of the parameters including blasting hole depth, slot hole arrangement depth, slot hole arrangement form, auxiliary hole depth, auxiliary hole arrangement depth, auxiliary hole arrangement form, spacing between auxiliary holes and slot holes, or auxiliary hole spacing.

5. The tunnel construction blasting vibration safety verification method according to claim 3 is characterized by: If the blasting design parameters are unqualified, then adjust any one or several of the parameters including the type of explosives, the charging form of the peripheral holes, the charging form of the slotted holes, the charging form of the auxiliary holes, the charging amount of the auxiliary holes, the charging amount of the slotted holes or the charging amount of the auxiliary holes.

6. The tunnel construction blasting vibration safety verification method according to claim 5 is characterized by: For the geometric model of tunnel excavation in soft surrounding rock, when establishing the geometric model of tunnel excavation, hexahedral mesh is used to divide the geometric model of tunnel rock mass; For the hard rock tunnel geometry model, tetrahedral mesh is used to divide the tunnel rock geometry model; Each hole and charging step is divided into triangular prism units. The unit size is set according to the size requirements of the tunnel excavation geometric model. The unit size is 15 to 20 times the diameter of the blasting hole.

7. An electronic device, characterized in that: include: at least one processor; A memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor so that the at least one processor can execute the method of any one of claims 1-6.

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

Images