A step blasting vibration waveform prediction method considering resistance line value

Abstract

The application discloses a bench blasting vibration waveform prediction method considering resistance line values, and relates to the bench blasting field.The method comprises the following steps: obtaining first experimental data and a first resistance line parameter value, and second experimental data and a second resistance line parameter value; determining a target parameter value according to the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data; determining a peak vibration velocity and a blasting vibration waveform function of each blast hole at a set monitoring point in bench group-hole blasting according to the first resistance line parameter value, the second resistance line parameter value, the first experimental data and the target parameter value; superimposing the blasting vibration waveform functions to obtain a blasting vibration waveform function corresponding to the set monitoring point; and blasting an open pit bench based on the blasting vibration waveform function and the peak vibration velocity of each blast hole at the set monitoring point.In the application, the influence of the resistance line values is quantitatively evaluated, and the safety and effectiveness of the blasting operation are ensured.

Description

TECHNICAL FIELD

[0001] The embodiment of the present application relates to the field of engineering blasting, in particular to a bench blasting vibration waveform prediction method considering resistance line value. BACKGROUND

[0002] Bench blasting is a blasting method in the form of bench. Bench blasting is divided into deep hole bench blasting and shallow hole bench blasting according to different hole diameters and hole depths. Open pit bench blasting is a basic means of mine production. Some large mines use large-diameter drilling machines to realize large-area, multi-row micro-difference deep hole blasting, and the hole network parameters, charging structure, filling method, initiation sequence and micro-difference interval time are deeply researched, and the improvement of blasting technology greatly improves the comprehensive production efficiency of mine production. In addition, with the updating of drilling equipment, the continuous improvement of industrial explosives and detonator quality, the use of new types of explosives and high-precision, multi-segment millisecond electric detonators, non-electric detonators and digital electronic detonators, the application of bench blasting technology has been further developed.

[0003] However, with the change of the resistance line value in the bench blasting, the energy transmission in the subsequent blasting process is changed, and the blasting vibration attenuation will also change. Therefore, in order to ensure the safety of open pit bench blasting construction and optimize the blasting design parameters, it is crucial to understand the influence of the resistance line on the blasting vibration attenuation. However, the previous research often only qualitatively evaluates the influence of the resistance line on the blasting vibration, and does not quantify the influence of these on the vibration attenuation. At the same time, when optimizing the blasting design scheme, only a single specific protection object is often considered, and the blasting scheme optimization method considering multiple protection objects at the same time has not been proposed. SUMMARY

[0004] The purpose of the present application is to at least solve one of the above technical defects.

[0005] In one aspect, the embodiment of the present application provides a bench blasting vibration waveform prediction method considering resistance line value, which comprises:

[0006] Obtaining first experimental data and first resistance line parameter value corresponding to the set monitoring point in the bare single-hole blasting experiment, and second experimental data and second resistance line parameter value corresponding to the set monitoring point in the bench single-hole blasting experiment;

[0007] According to the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data, determining the target parameter value affecting the blasting effect of the set monitoring point;

[0008] determine the peak vibration velocity and the blasting vibration waveform function of each blast hole at the set monitoring point in the bench group hole blasting according to the first resistance line parameter value, the second resistance line parameter value, the first experimental data and the target parameter value, the bench group hole being at least two blast holes in the bench;

[0009] superimpose the blasting vibration waveform function of each blast hole at the set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point;

[0010] blasting the open pit bench based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blast hole at the set monitoring point.

[0011] Optionally, the target parameter value includes a first parameter value and a second parameter value, and the target parameter value affecting the blasting effect of the set monitoring point is determined according to the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data, including:

[0012] determine the first parameter value according to the first experimental data;

[0013] determine the second parameter value according to the first parameter value, the first resistance line parameter value, the second resistance line parameter value and the second experimental data.

[0014] Optionally, the first experimental data includes the peak vibration velocity, the blast center distance and the maximum single shot charge, the first resistance line parameter value is a single resistance line parameter value, the first parameter value includes a site condition correlation coefficient and a decay coefficient, the second parameter value is a resistance line influence coefficient, the second experimental data includes the peak vibration velocity, the blast center distance and the maximum single shot charge, and the second resistance line parameter value is an average resistance line parameter value obtained according to the resistance line parameter values corresponding to the three free surfaces;

[0015] determine the first parameter value by the following formula:

[0016]

[0017] wherein, R the blast center distance in the first experimental data, Q the maximum single shot charge in the first experimental data, k the site condition correlation coefficient, α the decay coefficient, the peak vibration velocity in the first experimental data;

[0018] determine the second parameter value by the following formula:

[0019]

[0020] wherein, R the blast center distance in the second experimental data, Qis the maximum single shot charge in the second experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, is the peak vibration velocity in the second experimental data, is the resistance line influence coefficient, is the second resistance line parameter value, is the first resistance line parameter value.

[0021] Optionally, according to the first resistance line parameter value, the second resistance line parameter value, the first experimental data and the target parameter value, the peak vibration velocity and the blasting vibration waveform function of each blast hole in the bench group hole blasting at the set monitoring point are determined, comprising:

[0022] For each blast hole in the bench group hole blasting, the third experimental data corresponding to the blast hole is obtained, the third experimental data including the average resistance line parameter value of the blast hole according to the resistance line parameter values corresponding to the three free surfaces, the blast center distance and the maximum single shot charge; according to the first parameter value, the second parameter value, the first resistance line parameter value and the third experimental data, the peak vibration velocity of the blast hole at the set monitoring point is determined;

[0023] According to the second parameter value, the first resistance line parameter value and the first experimental data, the blasting vibration waveform function of each blast hole at the set monitoring point in the group hole bench blasting is determined.

[0024] Optionally, for each blast hole in the bench group hole blasting, the peak vibration velocity of the blast hole at the set monitoring point is determined by the following formula:

[0025]

[0026] wherein, R is the blast center distance of the i th blast hole, n is the maximum single shot charge of the i th blast hole, Q is the site condition correlation coefficient, n is the attenuation coefficient, k is the peak vibration velocity of the i th blast hole at the set monitoring point, α is the resistance line influence coefficient, is the average resistance line parameter value of the i th blast hole according to the resistance line parameter values corresponding to the three free surfaces, n is the first resistance line parameter value. Optionally, the first experimental data further includes the blasting vibration waveform function corresponding to the set monitoring point in the bare single blast hole blasting experiment, and the blasting vibration waveform function of the blast hole at the set monitoring point is determined by the following formula: n

[0027] ​​​​

[0028]

[0029] wherein, is the blast vibration waveform function of the i th blast hole at the set monitoring point, n is a resistance line influence coefficient, is the average resistance line parameter value of the i th blast hole according to the resistance line parameter values corresponding to the three free surfaces, is a first resistance line parameter value, n is the blast vibration waveform function of the i th blast hole at the set monitoring point, is the average resistance line parameter value of the i th blast hole according to the resistance line parameter values corresponding to the three free surfaces, is a first resistance line parameter value.

[0030] Optionally, the blast vibration waveform functions of each blast hole at the set monitoring point are superimposed to obtain the blast vibration waveform function corresponding to the set monitoring point by the following formula:

[0031]

[0032]

[0033] wherein, is the blast vibration waveform function corresponding to the set monitoring point, is the blast vibration waveform function of the i th blast hole at the set monitoring point, n is the average resistance line parameter value of the i th blast hole according to the resistance line parameter values corresponding to the three free surfaces, is a resistance line influence coefficient, n is an inter-hole delay time, Δt r is an inter-row delay time, β is the number of rows of blast holes in the bench group blast, is a first resistance line parameter value. r Optionally, after superimposing the blast vibration waveform functions of each blast hole at the set monitoring point to obtain the blast vibration waveform function corresponding to the set monitoring point, the method further comprises:

[0034] obtaining the category of the blast protection object and the blast safety criterion;

[0035] determining the safety range of the blast vibration waveform function corresponding to the set monitoring point and the safety range corresponding to the peak vibration velocity according to the category of the blast protection object and the blast safety criterion;

[0036] determining the safety range of the blast vibration waveform function corresponding to the set monitoring point and the safety range corresponding to the peak vibration velocity according to the category of the blast protection object and the blast safety criterion;

[0037] ​Based on the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity, the inter-hole delay time and inter-row delay time are adjusted by the interference reduction method to obtain the value range of the inter-hole delay time and the value range of the inter-row delay time.

[0038] Based on the range of values ​​for the inter-hole delay time and inter-row delay time, the blasting vibration waveform function corresponding to the set monitoring point is adjusted.

[0039] Optionally, the monitoring points include three monitoring points: the first experimental data, the second experimental data, the first resistance line parameter value, and the second resistance line parameter value. These are all data obtained by performing linear regression fitting on the data corresponding to each monitoring point using the least squares method.

[0040] Optionally, the three free surfaces of the blast hole are the free surface in the x-direction, the free surface in the y-direction, and the free surface in the z-direction. If the number of rows of blast holes in the bench blasting includes at least two rows, and each row includes at least one blast hole, then:

[0041] The resistance line parameter in the x-direction of the first borehole in each row is the hole spacing in the stepped group borehole blasting, the resistance line parameter in the y-direction is the row spacing in the stepped group borehole blasting, and the resistance line parameter in the z-direction is the distance from the surface of the borehole plug in contact with the air to the center of the explosive.

[0042] Starting from the second row of boreholes, the resistance line parameter values ​​for the second borehole and subsequent boreholes in each row are the difference between the borehole spacing and the blast radius in the x-direction, the difference between the row spacing and the blast radius in the y-direction, and the distance from the surface of the borehole plug in contact with the air to the center of the explosive in the z-direction.

[0043] On the other hand, embodiments of this application provide a step blasting vibration waveform prediction device that considers the resistance line value, the device comprising:

[0044] The data acquisition module is used to acquire the first experimental data and the first resistance line parameter value corresponding to the set monitoring point in the bare single-hole blasting experiment, as well as the second experimental data and the second resistance line parameter value corresponding to the set monitoring point in the stepped single-hole blasting experiment.

[0045] The data determination module is used to determine the target parameter value that affects the blasting effect at the set monitoring point based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data; and to determine the peak vibration velocity and blasting vibration waveform function of each blast hole at the set monitoring point in the step group blasting based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value, wherein the step group blasting consists of at least two blast holes in the step;

[0046] The function superposition module is used to superimpose the blasting vibration waveform function of each blast hole at a set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point.

[0047] The bench blasting module is used to blast open-air benches based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blast hole at the set monitoring point.

[0048] In another aspect, embodiments of this application provide an electronic device, including a processor and a memory:

[0049] The memory is configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform any of the methods in a step-blasting vibration waveform prediction method that takes into account the resistance line value.

[0050] The beneficial effects of the technical solutions provided in this application include at least the following:

[0051] In this embodiment, two different single-hole blasting experiments are designed to obtain the first and second resistance line parameter values. Then, based on the first experimental data, the first and second resistance line parameter values, and the second experimental data, the target parameter value affecting the blasting effect at the designated monitoring point is determined. Based on the obtained target parameter value and the first and second resistance line parameter values, the peak vibration velocity and blasting vibration waveform function in the bench-type multi-hole blasting are obtained. It is evident that by introducing the resistance line parameter value into the determination of the peak vibration velocity and blasting vibration waveform function, and by exploring the attenuation law of the resistance line influence coefficient on the blasting vibration velocity, the influence of the resistance line parameter value on the peak vibration velocity is quantitatively evaluated. This improves upon existing prediction formulas, significantly enhancing the ability to predict blasting vibration and the accuracy of blasting vibration velocity prediction, thereby ensuring the safety and effectiveness of blasting operations and reducing negative impacts on the surrounding environment and buildings.

[0052] Furthermore, this application adjusts the inter-hole delay time and inter-row delay time according to the type of blasting object and safety criteria using the interference vibration reduction method. Then, based on the adjusted value range, the superimposed blasting vibration waveform function is adjusted. This not only achieves the interference vibration reduction effect of canceling out the peaks and troughs of the vibration wave, but also, because different protected objects use different adjustment ranges, the determined blasting vibration waveform function will be more matched with the blasting object, thus solving the problem of coordinated prevention and control of multiple protected objects and ensuring that blasting vibration will not cause damage to the surrounding protected objects. Attached Figure Description

[0053] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0054] Figure 1 A flowchart illustrating a method for predicting the waveform of step blasting vibration considering resistance line value, provided in an embodiment of this application;

[0055] Figure 2 This is a diagram of an exposed single-hole blasting experimental model provided in an embodiment of this application;

[0056] Figure 3 A schematic diagram of peak vibration velocity provided for an embodiment of this application;

[0057] Figure 4 A diagram of a single-hole blasting test model for a stepped structure provided in this application embodiment;

[0058] Figure 5 A step-by-step blasting model diagram provided in an embodiment of this application;

[0059] Figure 6 A schematic diagram of a borehole charging structure provided in an embodiment of this application;

[0060] Figure 7-1 A top view of the resistance line of borehole 1 in a stepped multi-hole blasting process provided in an embodiment of this application;

[0061] Figure 7-2 A top view of the resistance line of borehole 2 in a stepped multi-hole blasting process provided in an embodiment of this application;

[0062] Figure 7-3 A top view of the resistance line of borehole 6 in a stepped multi-hole blasting operation provided in an embodiment of this application;

[0063] Figure 7-4 A top view of the resistance line of borehole 7 in a stepped multi-hole blasting process provided in an embodiment of this application;

[0064] Figure 7-5 A top view of the resistance lines of boreholes 11 and 12 in a stepped multi-hole blasting process provided in an embodiment of this application;

[0065] Figure 8 A schematic diagram of a step blasting vibration waveform prediction device considering resistance line value is provided in an embodiment of this application;

[0066] Figure 9 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this application. Detailed Implementation

[0067] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting the invention.

[0068] Those skilled in the art will understand that, unless specifically stated otherwise, the singular forms “a,” “an,” “the,” and “the” used herein may also include the plural forms. It should be further understood that the term “comprising” as used in this application means the presence of the stated features, integers, steps, operations, elements, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should be understood that when we say an element is “connected” or “coupled” to another element, it can be directly connected or coupled to the other element, or there may be intermediate elements. Furthermore, “connected” or “coupled” as used herein can include wireless connections or wireless coupling. The term “and / or” as used herein includes all or any units and all combinations of one or more associated listed items.

[0069] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0070] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0071] Specifically, such as Figure 1 As shown, the method may include:

[0072] Step S101: Obtain the first experimental data and the first resistance line parameter value corresponding to the set monitoring point in the bare single-hole blasting experiment, as well as the second experimental data and the second resistance line parameter value corresponding to the set monitoring point in the stepped single-hole blasting experiment.

[0073] In this context, "exposed single-hole blasting" refers to blasting from a single blast hole not located within a bench, while "bench single-hole blasting" refers to blasting from a single blast hole within a bench. Monitoring points are locations susceptible to blast vibrations. Optionally, the selection of monitoring points should adhere to four main principles: 1. Ensure the monitoring point can accurately capture blast vibration signals; 2. Select buildings of different types and structures as monitoring points; 3. Set up monitoring points in residential areas to assess the impact on residents' lives; 4. Select safe and easily operable monitoring points. For example, hospitals, schools, residential buildings, and office buildings within 300m of the blast zone; scenic spots, important buildings, structures, and facilities within 500m of the blast zone; and particularly important buildings, structures, and facilities within 1000m of the blast zone can be selected as monitoring points.

[0074] In an optional embodiment of this application, the set monitoring points include three set monitoring points. The first experimental data, the second experimental data, the first resistance line parameter value, and the second resistance line parameter value are all data after linear regression fitting of the data corresponding to each monitoring point using the least squares method.

[0075] Optionally, three monitoring points are selected as the set monitoring points in this application. In this case, for the exposed single-hole blasting experiment, there will be corresponding experimental data and resistance line parameter values ​​at each set monitoring point. The experimental data and resistance line parameter values ​​corresponding to each monitoring point can be subjected to linear regression fitting using the least squares method, and the processed data is used as the first experimental data and the first resistance line parameter value. Similarly, for the stepped single-hole blasting experiment, there will also be corresponding experimental data and resistance line parameter values ​​at each set monitoring point. Therefore, it is also necessary to perform linear regression fitting using the least squares method on the experimental data corresponding to each monitoring point, and then use the processed data as the second experimental data and the second resistance line parameter value. It is understood that the monitoring points selected for the stepped single-hole blasting experiment and the stepped single-hole blasting experiment in this application are the same.

[0076] Step S102: Based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data, determine the target parameter value that affects the blasting effect at the set monitoring point.

[0077] Optionally, after obtaining the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data, the target parameter values ​​that affect the blasting effect at the set monitoring point can be further determined.

[0078] In an optional embodiment of this application, the target parameter value includes a first parameter value and a second parameter value. The target parameter value affecting the blasting effect at the designated monitoring point is determined based on first experimental data, a first resistance line parameter value, a second resistance line parameter value, and the second experimental data, including:

[0079] Based on the first experimental data, the first parameter value;

[0080] The second parameter value is determined based on the first parameter value, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data.

[0081] The factors influencing the blasting effect at the monitoring point are numerous, thus resulting in multiple target parameters. In this application, the target parameter values ​​include a first parameter value and a second parameter value, each corresponding to a different influencing factor. Furthermore, the first parameter value corresponding to the designated monitoring point can be determined based on the obtained first experimental data. Then, based on the obtained first parameter value and the first resistance line parameter value, second resistance line parameter value, and second experimental data obtained from previous blasting experiments, the second parameter value is determined.

[0082] In optional embodiments of this application, the first experimental data includes peak vibration velocity, detonation center distance and maximum single-shot charge, the first resistance line parameter value is a single resistance line parameter value, the first parameter value includes site condition correlation coefficient and attenuation coefficient, the second parameter value is resistance line influence coefficient, the second experimental data includes peak vibration velocity, detonation center distance and maximum single-shot charge, and the second resistance line parameter value is the average resistance line parameter value obtained based on the resistance line parameter values ​​corresponding to the three free surfaces;

[0083] The value of the first parameter is determined using the following formula:

[0084]

[0085] in, R The distance from the explosion center in the first experimental data. Q This represents the maximum single-effect dose in the first experimental data. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... The peak vibration velocity in the first experimental data;

[0086] The value of the second parameter is determined using the following formula:

[0087]

[0088] in, R The distance from the explosion center in the second experimental data. Q It is the maximum single-effect dose in the second experimental data. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... The peak vibration velocity in the second experimental data. The resistance line influence coefficient, This is the parameter value for the second resistance line. This represents the parameter value for the first line of resistance.

[0089] Optionally, since the borehole is not located within a step during the exposed single-hole blasting experiment, there will be no free surface (which typically refers to the interface between the soil / rock medium and air; in this application, it refers to the surface of the borehole plug in contact with air). Therefore, only a single resistance line parameter value exists, namely the first resistance line parameter value. Furthermore, after the exposed single-hole blasting experiment, the peak vibration velocity (using...) during this single-hole blasting experiment can be obtained at each monitoring point. (represented), the distance from the center of the explosion (using) R (represented) and maximum single-shot charge (i.e.) Q ).

[0090] For example, suppose the experimental model diagram of an exposed single-hole blasting test is as follows: Figure 2 As shown in the figure, the circle in the figure is the top view of the blast hole, with 3 monitoring points (i.e., measuring point 1, measuring point 2, and measuring point 3). Taking monitoring point 1 as an example, the blast center distance in this exposed single-hole blasting experiment is shown in the figure. R As shown. Furthermore, after the experiment, the peak vibration velocity at each monitoring point was obtained (specifically as shown in...). Figure 3 As shown in the figure), the detonation center distance and the maximum single-shot charge can be obtained. At this time, the peak vibration velocity corresponding to each monitoring point can be linearly regressed and fitted using the least squares method. The processed peak vibration velocity is used as the peak vibration velocity in the first experimental data. Similarly, the detonation center distance and the maximum single-shot charge in the first experimental data can be obtained.

[0091] Furthermore, substituting the peak vibration velocity, detonation center distance, and maximum single-shot charge from the first experimental data into the Sadovsky formula, we obtain... The correlation coefficient (denoted by k) and attenuation coefficient (denoted by k) of the site conditions are obtained. express).

[0092] Optionally, in a single-hole blasting experiment on a bench, since the borehole is located within a bench, there will be three free surfaces for that borehole, resulting in three resistance parameter values. These can be obtained by using... 、 and This indicates that, furthermore, it can be based on 、 and Obtain the average resistance line parameter value (using ).

[0093] For example, suppose the experimental model diagram of single-hole blasting on a step is as follows: Figure 4As shown in the figure, the circle in the figure is the top view of the blast hole, with 3 monitoring points (i.e., measuring point 1, measuring point 2, and measuring point 3). Taking monitoring point 1 as an example, the blast center distance of the single blast hole blasting experiment on this step is shown in the figure. R As shown, the values ​​of the three resistance line parameters are as follows: 、 and (Not shown in the figure). Furthermore, after the single-hole blasting experiment on the step, the peak vibration velocity (using...) at each monitoring point can be obtained. (represented), the distance from the center of the explosion (using) R (represented) and maximum single-shot charge (i.e.) Q It is understandable that, since there are 3 monitoring points in this application, it is also necessary to perform linear regression fitting on the values ​​of detonation center distance, peak vibration velocity, maximum single explosive charge, and average resistance line parameter obtained from each monitoring point using the least squares method, and use the processed data as the second experimental data.

[0094] Furthermore, the detonation center distance, maximum single-explosive charge, site condition correlation coefficient, attenuation coefficient, peak vibration velocity, second resistance line parameter value, and first resistance line parameter value from the second experimental data are substituted into the formula. The resistance line influence coefficient is obtained. (i.e., the value of the second parameter).

[0095] In an optional embodiment of this application, the three free surfaces of the blast hole are the free surface in the x-direction, the free surface in the y-direction, and the free surface in the z-direction, respectively. If the number of rows of blast holes in the stepped group blasting includes at least two rows, and each row includes at least one blast hole, then:

[0096] The resistance line parameter in the x-direction of the first borehole in each row is the hole spacing in the stepped group borehole blasting, the resistance line parameter in the y-direction is the row spacing in the stepped group borehole blasting, and the resistance line parameter in the z-direction is the distance from the surface of the borehole plug in contact with the air to the center of the explosive.

[0097] Starting from the second row of boreholes, the resistance line parameter values ​​for the second borehole and subsequent boreholes in each row are the difference between the borehole spacing and the blast radius in the x-direction, the difference between the row spacing and the blast radius in the y-direction, and the distance from the surface of the borehole plug in contact with the air to the center of the explosive in the z-direction.

[0098] Optionally, in this application, the number of rows of boreholes in the bench-type multi-hole blasting includes at least two rows, with each row including at least one borehole. In this case, the three free surfaces of each borehole are the free surface in the horizontal x-direction, the free surface in the vertical y-direction, and the free surface in the z-direction (i.e., the distance from the center of the explosive charge to the top free surface). Furthermore, the resistance line parameter values ​​corresponding to the free surfaces in the three directions can be obtained based on the row spacing and hole spacing in the bench-type multi-hole blasting, as well as the blast radius (referring to the radius of the fractured area formed by the rock mass after the explosive detonation in the borehole, denoted by d).

[0099] For example, assuming the step-by-step blasting model diagram is shown in Figure 5, the row spacing in the step-by-step blasting is represented by 'b', and the hole spacing is represented by 'a'. In this case, the resistance parameter of the first borehole in each row is the hole spacing (a) in the x-direction, the resistance parameter in the y-direction is the row spacing (b), and the resistance parameter in the z-direction is the distance from the surface of the borehole plug in contact with air to the center of the explosive. Starting from the second row of boreholes, the resistance parameter values ​​of the second borehole and subsequent boreholes in each row are the difference between the hole spacing and the blast radius (ad) in the x-direction, the difference between the row spacing and the blast radius (bd) in the y-direction, and the resistance parameter values ​​in the z-direction are the distance from the surface of the borehole plug in contact with air to the center of the explosive.

[0100] Optional, such as Figure 6 As shown in the figure, this application provides a schematic diagram of a borehole charging structure, where the diameter of the propellant charge in the borehole is represented by L1, and the diameter of the remaining portion of the borehole excluding the propellant charge is represented by L2. In this case, the resistance parameter value in the z-direction can be represented by L1 + L2 / 2. Optionally, as... Figure 7-1 to Figure 7-5 As shown in the embodiment of this application, a top view schematic diagram of the resistance line of each blast hole in a stepped multi-hole blasting is also provided. Figure 7-1 and Figure 7-2 There are 15 blast holes in 3 rows, numbered 1 to 15. Figure 7-1 The diagram shows the resistance lines in the x and y directions of borehole 1 (i.e., and ), Figure 7-2 The diagram shows the resistance lines in the x and y directions of borehole 2 (i.e., and ), Figure 7-3 The diagram shows the resistance lines in the x and y directions of borehole 6 (i.e., and ), Figure 7-4 The diagram shows the resistance lines in the x and y directions of borehole 7 (i.e., and ), Figure 7-5The diagram shows the resistance lines in the x and y directions of the borehole 11 (i.e., and ), and the resistance lines in the x and y directions of the borehole 12 (i.e. and ).

[0101] Step S103: Based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value, determine the peak vibration velocity and blasting vibration waveform function of each blast hole at the set monitoring point in the step group blasting. The step group blasting consists of at least two blast holes in the step.

[0102] Optionally, for each borehole in the step-by-step blasting, the peak vibration velocity and blasting vibration waveform function of each borehole at the set monitoring point can be obtained based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value determined above.

[0103] In optional embodiments of this application, the peak vibration velocity and blasting vibration waveform function of each borehole in the stepped multi-hole blasting at a set monitoring point are determined based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value, including:

[0104] For each borehole in the bench-type blasting, the third experimental data corresponding to the borehole is obtained. The third experimental data includes the average resistance line parameter value, the detonation center distance, and the maximum single-shot charge of the borehole obtained from the resistance line parameter values ​​corresponding to the three free surfaces. Based on the first parameter value, the second parameter value, the first resistance line parameter value, and the third experimental data, the peak vibration velocity of the borehole at the set monitoring point is determined.

[0105] Based on the second parameter value, the first resistance line parameter value, and the first experimental data, the blasting vibration waveform function of each borehole at the set monitoring point during multi-hole bench blasting is determined.

[0106] Optionally, in bench-type multi-hole blasting, for each borehole, the resistance parameter values ​​for the three free surfaces of the borehole (i.e., the resistance parameter values ​​in the horizontal x-direction, vertical y-direction, and z-direction) can be predetermined, and then the average resistance parameter value of the three resistance parameter values ​​can be calculated. Simultaneously, the detonation center distance and maximum single-shot charge of the borehole at the set monitoring point can also be obtained. Further, based on the determined first parameter value, second parameter value, first resistance parameter value, and the average resistance parameter value, detonation center distance, and maximum single-shot charge of the borehole, the peak vibration velocity of the borehole at the set monitoring point can be determined. Additionally, the blasting vibration waveform function of the borehole at the set monitoring point can be determined based on the second parameter value, the first resistance parameter value, and the first experimental data.

[0107] In an optional embodiment of this application, for each borehole in a stepped multi-hole blasting process, the peak vibration velocity of the borehole at a set monitoring point is determined using the following formula:

[0108]

[0109] in, R For the first n The distance between the blast centers of each blast hole Q It is the first n The maximum charge per blast hole. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... For the first n The peak vibration velocity of each borehole at the set monitoring point The resistance line influence coefficient, For the first n The average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. This represents the parameter value for the first line of resistance.

[0110] Optionally, for the first stage of step-by-step blasting... n The first cannon hole can be used to obtain the first... n The detonation distance and maximum single-shot charge of each borehole at the set monitoring point, and based on this... n The average resistance parameter value obtained from the three resistance parameter values ​​of each borehole, and the resistance parameter value of the previously determined bare single-bore blasting experiment (i.e., the first resistance parameter value) Then substitute it into the above formula to obtain the first... n Peak vibration velocity of each borehole at the set monitoring point .

[0111] In an optional embodiment of this application, the first experimental data further includes the blasting vibration waveform function corresponding to the set monitoring point in the bare single borehole blasting experiment. The blasting vibration waveform function of the borehole at the set monitoring point is determined by the following formula:

[0112]

[0113] in, For the first n The blasting vibration waveform function of each blast hole at a set monitoring point. The resistance line influence coefficient, For the first n The average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. The parameter value for the first line of resistance. This defines the blasting vibration waveform function corresponding to the monitoring point in the bare single-hole blasting experiment.

[0114] Optionally, the first experimental data may also include the blasting vibration waveform function at the set monitoring point in the exposed single-hole blasting experiment. For the first step in the group hole blasting n For the first borehole, the determined resistance line influence coefficient value can be based on this first borehole. n The average resistance parameter value obtained from the resistance parameter values ​​corresponding to the three free surfaces of each borehole. First line of resistance parameter values The blasting vibration waveform function corresponding to the monitoring point set in the bare single-hole blasting experiment Substituting into the above formula, we obtain the first... n Blasting vibration waveform function of a blast hole at a set monitoring point .

[0115] Step S104: Superimpose the blasting vibration waveform functions of each blast hole at the set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point.

[0116] Furthermore, after obtaining the blasting vibration waveform function of each blast hole at the set monitoring point, the blasting vibration waveform functions of each blast hole at the set monitoring point can be superimposed to obtain the blasting vibration waveform function corresponding to the set monitoring point.

[0117] In an optional embodiment of this application, the blasting vibration waveform function corresponding to the set monitoring point can be obtained by superimposing the blasting vibration waveform function of each blast hole at the set monitoring point using the following formula:

[0118]

[0119] in, To set the blasting vibration waveform function corresponding to the monitoring point, For the first n The blasting vibration waveform function of each blast hole at a set monitoring point. For the first n The average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. β The resistance line influence coefficient, For the delay time between holes, To extend the time for arranging rooms, r This refers to the number of rows of blast holes in a stepped group blasting operation. This represents the parameter value for the first line of resistance.

[0120] In practical applications, the method of superimposing the blasting vibration waveform function of each blast hole at a set monitoring point is not limited in this application embodiment. For example, the superposition of blasting vibration waveforms can be implemented based on Python (an interpreted, object-oriented, dynamic data type high-level programming language) software.

[0121] In an optional embodiment of this application, the blasting vibration waveform function of each borehole at a set monitoring point is superimposed, including:

[0122] Obtain the category of the object to be protected by blasting and the blasting safety guidelines;

[0123] Based on the category of the blasting protection object and the blasting safety criteria, determine the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity corresponding to the set monitoring point;

[0124] Based on the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity, the inter-hole delay time and inter-row delay time are adjusted by the interference reduction method to obtain the value range of the inter-hole delay time and the value range of the inter-row delay time.

[0125] Based on the range of values ​​for the inter-hole delay time and the inter-row delay time, the blasting vibration waveform function of each blast hole at the set monitoring point is superimposed.

[0126] Optionally, when superimposing the blasting vibration waveforms of each borehole at a set monitoring point, the influence of inter-hole delay time and inter-row delay time needs to be considered. Therefore, the range of values ​​for inter-hole delay time and inter-row delay time needs to be determined during superposition. Specifically, first, it is necessary to clarify the category of the object to be protected by blasting, such as earthen cave dwellings, adobe houses, rubble houses, general civil buildings, industrial and commercial buildings, ancient buildings and historical sites, etc. Then, according to blasting safety guidelines (such as the "Blasting Safety Regulations"), the values ​​of the safe permissible particle vibration velocities corresponding to different categories of protected objects are found. These values ​​vary depending on the vibration frequency f (f≤10Hz, 10Hz, etc.).<f≤50Hz、f> There is a difference (50Hz). Further, a spectral analysis is performed on the obtained peak vibration velocity to determine the dominant frequency, which is then compared with the values ​​in the blasting safety criteria to determine whether the dominant frequency and peak vibration velocity are within the allowable safe range. If they are not within the range, the inter-hole delay time and the inter-row delay time can be adjusted according to the determined safe range using interference reduction methods (e.g., selecting the delay time as an odd multiple of the half-cycle of the blasting vibration wave can achieve the interference reduction effect of wave peaks and troughs canceling each other out). This yields the value ranges for the inter-hole delay time and the inter-row delay time. Then, based on the value ranges for the inter-hole delay time and the inter-row delay time, the superimposed blasting vibration waveform function is adjusted to ensure that the blasting vibration does not damage the protected object.

[0127] Step S105: Detonate the open-air bench based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blast hole at the set monitoring point.

[0128] Optionally, after obtaining the corresponding test points, the blasting can be performed on the open-pit bench based on the determined vibration waveform function and the peak vibration velocity of each borehole at the set monitoring point.

[0129] In this embodiment, two different single-hole blasting experiments are designed to obtain the first and second resistance line parameter values. Then, based on the first experimental data, the first and second resistance line parameter values, and the second experimental data, the target parameter value affecting the blasting effect at the designated monitoring point is determined. Based on the obtained target parameter value and the obtained resistance line parameter value, the peak vibration velocity and blasting vibration waveform function in the bench-type multi-hole blasting are obtained. It is evident that by introducing the resistance line parameter value into the determination of the peak vibration velocity and blasting vibration waveform function, and by exploring the attenuation law of the resistance line influence coefficient on the blasting vibration velocity, the influence of the resistance line parameter value on the peak vibration velocity is quantitatively evaluated. This improves upon existing prediction formulas, significantly enhancing the ability to predict blasting vibration and the accuracy of blasting vibration velocity prediction, thereby ensuring the safety and effectiveness of blasting operations and reducing negative impacts on the surrounding environment and buildings.

[0130] This application provides a step blasting vibration waveform prediction device that considers the resistance line value, such as... Figure 8 As shown, the device 80 may include: a data acquisition module 801, a data determination module 802, a function superposition module 803, and a step blasting module 804, wherein,

[0131] The data acquisition module is used to acquire the first experimental data and the first resistance line parameter value corresponding to the set monitoring point in the bare single-hole blasting experiment, as well as the second experimental data and the second resistance line parameter value corresponding to the set monitoring point in the stepped single-hole blasting experiment.

[0132] The data determination module is used to determine the target parameter value that affects the blasting effect at the set monitoring point based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data; and to determine the peak vibration velocity and blasting vibration waveform function of each blast hole at the set monitoring point in the step group blasting based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value, wherein the step group blasting consists of at least two blast holes in the step;

[0133] The function superposition module is used to superimpose the blasting vibration waveform function of each blast hole at a set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point.

[0134] The bench blasting module is used to blast open-air benches based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blast hole at the set monitoring point.

[0135] Optionally, the target parameter values ​​include a first parameter value and a second parameter value. When the data determination module determines the target parameter values ​​affecting the blasting effect at the set monitoring point based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data, it is specifically used for:

[0136] Based on the first experimental data, determine the value of the first parameter;

[0137] The second parameter value is determined based on the first parameter value, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data.

[0138] Optionally, the first experimental data includes peak vibration velocity, detonation center distance and maximum single-shot charge, the first resistance line parameter value is a single resistance line parameter value, the first parameter value includes site condition correlation coefficient and attenuation coefficient, the second parameter value is resistance line influence coefficient, the second experimental data includes peak vibration velocity, detonation center distance and maximum single-shot charge, the second resistance line parameter value is the average resistance line parameter value obtained based on the resistance line parameter values ​​corresponding to the three free surfaces;

[0139] The value of the first parameter is determined using the following formula:

[0140]

[0141] in, R The distance from the explosion center in the first experimental data. Q This represents the maximum single-effect dose in the first experimental data. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... The peak vibration velocity in the first experimental data;

[0142] The value of the second parameter is determined using the following formula:

[0143]

[0144] in, R The distance from the explosion center in the second experimental data. Q It is the maximum single-effect dose in the second experimental data. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... The peak vibration velocity in the second experimental data. The resistance line influence coefficient, This is the parameter value for the second resistance line. This represents the parameter value for the first line of resistance.

[0145] Optionally, when the data determination module determines the peak vibration velocity and blasting vibration waveform function of each borehole in the stepped multi-hole blasting at a set monitoring point based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value, it is specifically used for:

[0146] For each borehole in the bench-type blasting, the third experimental data corresponding to the borehole is obtained. The third experimental data includes the average resistance line parameter value, the detonation center distance, and the maximum single-shot charge of the borehole obtained from the resistance line parameter values ​​corresponding to the three free surfaces. Based on the first parameter value, the second parameter value, the first resistance line parameter value, and the third experimental data, the peak vibration velocity of the borehole at the set monitoring point is determined.

[0147] Based on the second parameter value, the first resistance line parameter value, and the first experimental data, the blasting vibration waveform function of each borehole at the set monitoring point during multi-hole bench blasting is determined.

[0148] Optionally, for each borehole in a bench-type blasting system, the peak vibration velocity at a set monitoring point is determined using the following formula:

[0149]

[0150] in, R For the first n The distance between the blast centers of each blast hole Q It is the first n The maximum charge per blast hole. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... For the first n The peak vibration velocity of each borehole at the set monitoring point The resistance line influence coefficient, For the first n The average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. This represents the parameter value for the first line of resistance.

[0151] Optionally, the first experimental data also includes the vibration waveform function corresponding to the set monitoring point in the bare single borehole blasting experiment, which is determined by the following formula:

[0152]

[0153] in, For the first n The blasting vibration waveform function of each blast hole at a set monitoring point. The resistance line influence coefficient, For the first nThe average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. The parameter value for the first line of resistance. This defines the blasting vibration waveform function corresponding to the monitoring point in the bare single-hole blasting experiment.

[0154] Optionally, the blasting vibration waveform functions of each borehole at the set monitoring point can be superimposed using the following formula to obtain the blasting vibration waveform function corresponding to the set monitoring point:

[0155]

[0156] in, To set the blasting vibration waveform function corresponding to the monitoring point, For the first n The blasting vibration waveform function of each blast hole at a set monitoring point. For the first n The average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. β The resistance line influence coefficient, For the delay time between holes, To extend the time for arranging rooms, r This refers to the number of rows of blast holes in a stepped group blasting operation. This represents the parameter value for the first line of resistance.

[0157] Optionally, after superimposing the blasting vibration waveform functions of each borehole at the set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point, the function superposition module is also used for:

[0158] Obtain the category of the object to be protected by blasting and the blasting safety guidelines;

[0159] Based on the category of the blasting protection object and the blasting safety criteria, determine the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity corresponding to the set monitoring point;

[0160] Based on the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity, the inter-hole delay time and inter-row delay time are adjusted by the interference reduction method to obtain the value range of the inter-hole delay time and the value range of the inter-row delay time.

[0161] Based on the range of values ​​for the delay time between holes and between rows, the blasting vibration waveform function corresponding to the set monitoring point is adjusted.

[0162] Optionally, the monitoring points include three monitoring points: the first experimental data, the second experimental data, the first resistance line parameter value, and the second resistance line parameter value. These are all data obtained by performing linear regression fitting on the data corresponding to each monitoring point using the least squares method.

[0163] Optionally, the three free surfaces of the blast hole are the free surface in the x-direction, the free surface in the y-direction, and the free surface in the z-direction. If the number of rows of blast holes in the bench blasting includes at least two rows, and each row includes at least one blast hole, then:

[0164] The resistance line parameter in the x-direction of the first borehole in each row is the hole spacing in the stepped group borehole blasting, the resistance line parameter in the y-direction is the row spacing in the stepped group borehole blasting, and the resistance line parameter in the z-direction is the distance from the surface of the borehole plug in contact with the air to the center of the explosive.

[0165] Starting from the second row of boreholes, the resistance line parameter values ​​for the second borehole and subsequent boreholes in each row are the difference between the borehole spacing and the blast radius in the x-direction, the difference between the row spacing and the blast radius in the y-direction, and the distance from the surface of the borehole plug in contact with the air to the center of the explosive in the z-direction.

[0166] The step blasting vibration waveform prediction device considering resistance line value in this embodiment can execute the step blasting vibration waveform prediction method considering resistance line value shown in the embodiment of this application. The implementation principle is similar, and will not be described again here.

[0167] This application provides an electronic device, which includes: a processor; and a memory configured to store machine-readable instructions that, when executed by the processor, cause the processor to perform a step blasting vibration waveform prediction method that takes into account the resistance line value.

[0168] This application provides an electronic device, such as... Figure 9 As shown, Figure 9 The illustrated electronic device 2000 includes a processor 2001 and a memory 2003. The processor 2001 and the memory 2003 are connected, for example, via a bus 2002. Optionally, the electronic device 2000 may also include a transceiver 2004. It should be noted that in practical applications, the transceiver 2004 is not limited to one type, and the structure of this electronic device 2000 does not constitute a limitation on the embodiments of this application.

[0169] Processor 2001 may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA, or other programmable logic device, transistor logic device, hardware component, or any combination thereof. It may implement or execute the various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of this application. Processor 2001 may also be a combination that implements computational functions, such as including one or more microprocessor combinations, a combination of a DSP and a microprocessor, etc.

[0170] Bus 2002 may include a pathway for transmitting information between the aforementioned components. Bus 2002 may be a PCI bus or an EISA bus, etc. Bus 2002 can be divided into address bus, data bus, control bus, etc. For ease of representation, Figure 9 The bus is represented by a single thick line, but this does not mean that there is only one bus or one type of bus.

[0171] The memory 2003 may be ROM or other type of static storage device capable of storing static information and instructions, RAM or other type of dynamic storage device capable of storing information and instructions, or EEPROM, CD-ROM or other optical disc storage, optical disc storage (including compressed optical discs, laser discs, optical discs, digital universal optical discs, Blu-ray discs, etc.), magnetic disk storage media or other magnetic storage devices, or any other medium capable of carrying or storing desired program code in the form of instructions or data structures and accessible by a computer, but not limited thereto.

[0172] The memory 2003 stores the application code that executes the scheme of this application, and its execution is controlled by the processor 2001. The processor 2001 executes the application code stored in the memory 2003 to implement... Figure 8 The embodiment shown illustrates the operation of a step blasting vibration prediction device that takes into account the resistance line value.

[0173] It should be understood that although the steps in the flowcharts of the accompanying figures are shown sequentially as indicated by the arrows, these steps are not necessarily executed in the order indicated by the arrows. Unless explicitly stated herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least some steps in the flowcharts of the accompanying figures may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be performed alternately or in turn with other steps or at least some of the sub-steps or stages of other steps.

[0174] The above description is only a partial embodiment of the present invention. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for predicting the vibration waveform of stepped blasting considering the resistance line value, characterized in that, include: Acquire the first experimental data and the first resistance line parameter value corresponding to the set monitoring point in the bare single-hole blasting experiment, and the second experimental data and the second resistance line parameter value corresponding to the set monitoring point in the stepped single-hole blasting experiment. Based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data, determine the target parameter value that affects the blasting effect at the set monitoring point; Based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data and the target parameter value, the peak vibration velocity and blasting vibration waveform function of each blast hole in the step group blasting at the set monitoring point are determined, wherein the step group blasting consists of at least two blast holes in the step; The blasting vibration waveform functions of each blast hole at the set monitoring point are superimposed to obtain the blasting vibration waveform function corresponding to the set monitoring point. The open-air bench is blasted based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blast hole at the set monitoring point. The target parameter values ​​include a first parameter value and a second parameter value. Determining the target parameter values ​​affecting the blasting effect at the set monitoring point based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data includes: Based on the first experimental data, determine the value of the first parameter; The second parameter value is determined based on the first parameter value, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data; The first experimental data includes peak vibration velocity, detonation distance, and maximum single-shot charge. The first resistance line parameter value is a single resistance line parameter value. The first parameter value includes the site condition correlation coefficient and attenuation coefficient. The second parameter value is the resistance line influence coefficient. The second experimental data includes peak vibration velocity, detonation distance, and maximum single-shot charge. The second resistance line parameter value is the average resistance line parameter value obtained based on the resistance line parameter values ​​corresponding to the three free surfaces. The value of the first parameter is determined using the following formula: ； in, R The distance from the explosion center in the first experimental data. Q This refers to the maximum single-effect drug dosage in the first experimental data. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... The peak vibration velocity in the first experimental data; The value of the second parameter is determined using the following formula: ； in, R The distance from the center of explosion in the second experimental data. Q It is the maximum single-effect drug dosage in the second experimental data. k The correlation coefficient is the correlation coefficient between site conditions. α The attenuation coefficient is... The peak vibration velocity in the second experimental data is... The resistance line influence coefficient, The second resistance line parameter value, The parameter value for the first resistance line.

2. The method according to claim 1, characterized in that, The step of determining the peak vibration velocity and blasting vibration waveform function of each borehole in the stepped multi-hole blasting at the set monitoring point based on the first resistance line parameter value, the second resistance line parameter value, the first experimental data, and the target parameter value includes: For each borehole in the bench-type blasting, the third experimental data corresponding to the borehole is obtained. The third experimental data includes the average resistance line parameter value, the detonation center distance, and the maximum single-shot charge of the borehole obtained from the resistance line parameter values ​​corresponding to the three free surfaces. Based on the first parameter value, the second parameter value, the first resistance line parameter value, and the third experimental data, the peak vibration velocity of the borehole at the set monitoring point is determined. Based on the second parameter value, the first resistance line parameter value, and the first experimental data, the blasting vibration waveform function of each borehole at the set monitoring point during multi-hole bench blasting is determined.

3. The method according to claim 2, characterized in that, For each borehole in a bench-type borehole blasting process, the peak vibration velocity of the borehole at the designated monitoring point is determined using the following formula: Where R is the detonation distance of the nth borehole, Q is the maximum single-shot charge of the nth borehole, k is the site condition correlation coefficient, α is the attenuation coefficient, and V n Let β be the peak vibration velocity of the nth borehole at the set monitoring point, and β be the resistance line influence coefficient. Let be the average resistance parameter value obtained for the nth borehole based on the resistance parameter values ​​corresponding to the three free surfaces. The parameter value for the first resistance line.

4. The method according to claim 2, characterized in that, The first experimental data also includes the blasting vibration waveform function corresponding to the set monitoring point in the bare single borehole blasting experiment. The blasting vibration waveform function of the borehole at the set monitoring point is determined by the following formula: ； in, For the first n The blasting vibration waveform function of each blast hole at the set monitoring point. The resistance line influence coefficient, For the first n The average resistance parameter value is obtained for each borehole based on the resistance parameter values ​​corresponding to the three free surfaces. The parameter value of the first resistance line. This is the blasting vibration waveform function corresponding to the set monitoring point in the bare single-hole blasting experiment.

5. The method according to claim 4, characterized in that, The blasting vibration waveform function corresponding to the set monitoring point is obtained by superimposing the blasting vibration waveform functions of each blast hole at the set monitoring point using the following formula: Where ω(t) is the blasting vibration waveform function corresponding to the set monitoring point, V n (t) is the blasting vibration waveform function of the nth borehole at the set monitoring point. Δt is the average resistance parameter value obtained for the nth borehole based on the resistance parameter values ​​corresponding to the three free surfaces, β is the resistance influence coefficient, and Δt is the resistance parameter value. h Let Δt be the time delay between holes. r The delay time between rows is given by r, where r is the number of rows of blast holes in the step-by-step blasting. The parameter value for the first resistance line.

6. The method according to claim 5, characterized in that, After superimposing the blasting vibration waveform functions of each borehole at the set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point, the method further includes: Obtain the category of the object to be protected by blasting and the blasting safety guidelines; Based on the category of the blasting protection object and the blasting safety criteria, determine the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity corresponding to the set monitoring point; Based on the safe range of the blasting vibration waveform function and the safe range of the peak vibration velocity, the inter-hole delay time and the inter-row delay time are adjusted by the interference vibration reduction method to obtain the value range of the inter-hole delay time and the value range of the inter-row delay time. Based on the range of values ​​for the inter-hole delay time and the inter-row delay time, the blasting vibration waveform function corresponding to the set monitoring point is adjusted.

7. The method according to claim 1, characterized in that, The set monitoring points include three set monitoring points. The first experimental data, the second experimental data, the first resistance line parameter value, and the second resistance line parameter value are all data that have been processed by linear regression fitting using the least squares method for the data corresponding to each monitoring point.

8. The method according to claim 1, characterized in that, The three free surfaces of the blast hole are the free surface in the x-direction, the free surface in the y-direction, and the free surface in the z-direction. If the number of rows of blast holes in the stepped group blasting includes at least two rows, and each row includes at least one blast hole, then: The resistance line parameter value in the x-direction of the first borehole in each row is the hole spacing in the stepped group borehole blasting, the resistance line parameter value in the y-direction is the row spacing in the stepped group borehole blasting, and the resistance line parameter value in the z-direction is the distance from the surface of the borehole plug in contact with the air to the center of the explosive. Starting from the second row of boreholes, the resistance line parameter values ​​for the second borehole and subsequent boreholes in each row are the difference between the borehole spacing and the blast radius in the x-direction, the difference between the row spacing and the blast radius in the y-direction, and the distance from the surface of the borehole plug in contact with the air to the center of the explosive in the z-direction.

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