Step blasting vibration waveform prediction method considering resistance line value

Abstract

The invention discloses a bench blasting vibration waveform prediction method considering a resistance line value, and relates to the field of bench blasting. The method comprises the following steps: acquiring first experimental data, a first resistance line parameter value, 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; according to the first resistance line parameter value, the second resistance line parameter value, the first experimental data and the target parameter value, determining a peak vibration speed and a blasting vibration waveform function of each blast hole in step group hole blasting when a monitoring point is set; superposing the blasting vibration waveform functions to obtain a blasting vibration waveform function corresponding to the set monitoring point; and the open-air step is blasted based on the blasting vibration waveform function and the peak vibration speed of each blast hole at the set monitoring point. According to the method, the influence of the resistance line value is quantitatively evaluated, and the safety and effectiveness of blasting operation are ensured.

Description

Technical Field

[0001] The embodiments of the present application relate to the field of engineering blasting, and in particular to a method for predicting step blasting vibration waveforms taking into account resistance line values. Background Art

[0002] Step blasting is a blasting method that advances in the form of steps. Step blasting is divided into deep hole step blasting and shallow hole step blasting according to the hole diameter and hole depth. Open-pit step blasting is a basic means of mining production. Some large mines use large-diameter drilling rigs to achieve large-area, multi-row micro-difference deep hole blasting. In-depth research has been conducted on hole network parameters, charging structure, filling method, detonation sequence, and micro-difference interval time. The improvement of blasting technology has greatly improved the comprehensive production efficiency of mining production. In addition, with the updating of drilling machinery and equipment, the continuous improvement of the quality of industrial explosives and detonators, the use of new varieties of explosives and high-precision, multi-stage millisecond electric detonators, non-electric detonators and digital electronic detonators, the application of step blasting technology has been further developed.

[0003] However, as the resistance line value changes in step blasting, the energy transfer 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 step blasting construction, optimize the blasting design parameters, and understand the impact of the resistance line on blasting vibration attenuation, it is crucial. However, previous studies often only qualitatively evaluated the impact of the resistance line on blasting vibration, without quantifying these effects on vibration attenuation. At the same time, when optimizing the blasting design plan, only a single specific protection object is often considered, and a blasting plan optimization method for considering multiple protection objects at the same time has not yet been proposed. Summary of the invention

[0004] The purpose of this application is to solve at least one of the above-mentioned technical deficiencies.

[0005] On the one hand, an embodiment of the present application provides a step blasting vibration waveform prediction method considering a resistance line value, the method comprising:

[0006] Acquire the first experimental data and the first resistance line parameter value corresponding to the set monitoring point in the exposed 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;

[0007] Determine a target parameter value that affects a blasting effect of a set monitoring point according to the first experimental data, the first resistance line parameter value, the second resistance line parameter value, and the second experimental data;

[0008] Determine the peak vibration velocity and blasting vibration waveform function of each blast hole in the step group hole blasting at a set monitoring point according to 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 hole is at least two blast holes in the step;

[0009] The blasting vibration waveform function of each blasthole at the set monitoring point is superimposed to obtain the blasting vibration waveform function corresponding to the set monitoring point;

[0010] The open-pit steps are blasted based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blasthole 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 a first parameter value according to the first experimental data;

[0013] The second parameter value is determined 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 peak vibration velocity, explosion 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 a site condition correlation coefficient and an attenuation coefficient, the second parameter value is a resistance line influence coefficient, the second experimental data includes peak vibration velocity, explosion center distance and maximum single-shot charge, and the second resistance line parameter value is an average resistance line parameter value obtained based on the resistance line parameter values ​​corresponding to the three free surfaces;

[0015] The first parameter value is determined by the following formula:

[0016]

[0017] Among them, R is the distance from the explosion center in the first experimental data, Q is the maximum single-shot charge in the first experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, and V0 is the peak vibration velocity in the first experimental data;

[0018] The second parameter value is determined by the following formula:

[0019]

[0020] Among them, R is the distance from the explosion center in the second experimental data, Q is the maximum single-shot charge in the second experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, V s is the peak vibration velocity in the second experimental data, β is the resistance line influence coefficient, is the second resistance line parameter value, is the parameter value of the first resistance line.

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

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

[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 during the group hole step blasting is determined.

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

[0025]

[0026] Among them, R is the distance from the center of the nth blast hole, Q is the maximum single-shot charge of the nth blast hole, k is the site condition correlation coefficient, α is the attenuation coefficient, V n is the peak vibration velocity of the nth blasthole at the set monitoring point, β is the influence coefficient of the resistance line, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the parameter value of the first resistance line.

[0027] Optionally, the first experimental data also includes a blasting vibration waveform function corresponding to a set monitoring point in an exposed single blasthole blasting experiment, and the blasting vibration waveform function of the blasthole at the set monitoring point is determined by the following formula:

[0028]

[0029] Among them, V n (t) is the blasting vibration waveform function of the nth blasthole at the set monitoring point, β is the resistance line influence coefficient, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the parameter value of the first resistance line, and V0(t) is the blasting vibration waveform function corresponding to the set monitoring point in the exposed single-hole blasting experiment.

[0030] Optionally, the blasting vibration waveform function of each blasthole at the set monitoring point is superimposed by the following formula to obtain the blasting vibration waveform function corresponding to the set monitoring point:

[0031]

[0032]

[0033] Among them, 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 blasthole at the set monitoring point, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, β is the resistance line influence coefficient, Δt h is the delay time between holes, Δt r is the delay time between rows, r is the number of rows of blast holes in the bench group blasting, is the parameter value of the first resistance line.

[0034] Optionally, after superimposing the blasting vibration waveform function of each blasthole at the set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point, the method further includes:

[0035] Obtain the category of blasting protection objects and blasting safety criteria;

[0036] According to the category of blasting protection objects and blasting safety criteria, determine the safety range of the blasting vibration waveform function corresponding to the set monitoring point and the safety range corresponding to the peak vibration velocity;

[0037] According to the safety range of the blasting vibration waveform function and the safety range of the peak vibration velocity, the delay time between holes and the delay time between rows are adjusted by the interference vibration reduction method, and the value range of the delay time between holes and the value range of the delay time between rows are obtained;

[0038] According to the value range of the delay time between holes and the delay time between rows, the blasting vibration waveform function corresponding to the set monitoring point is adjusted.

[0039] Optionally, the set monitoring points include three set monitoring points, and the first experimental data, the second experimental data, the first resistance line parameter value and the second resistance line parameter value are all data corresponding to each monitoring point after linear regression fitting processing using the least squares method.

[0040] Optionally, the three free surfaces of the blastholes 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 blastholes in the step group hole blasting includes at least two rows and each row includes at least one blasthole, then:

[0041] The resistance line parameter value of the first blasthole in each row in the x direction is the hole spacing in the step group blasting, the resistance line parameter value in the y direction is the row spacing in the step group blasting, and the resistance line parameter value in the z direction is the distance from the surface of the blasthole blockage in contact with the air to the center of the explosive;

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

[0043] On the other hand, an embodiment of the present application provides a step blasting vibration waveform prediction device considering a resistance line value, the device comprising:

[0044] A data acquisition module is used to acquire first experimental data and a first resistance line parameter value corresponding to a set monitoring point in an exposed single-hole blasting experiment, and second experimental data and a second resistance line parameter value corresponding to a set monitoring point in a stepped single-hole blasting experiment;

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

[0046] A function superposition module is used to superimpose the blasting vibration waveform function of each blasthole at a set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point;

[0047] The step blasting module is used to blast the open-pit steps based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blasthole at the set monitoring point.

[0048] On the other hand, an embodiment of the present application provides an electronic device, including a processor and a memory:

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

[0050] The beneficial effects brought by the technical solution provided in the embodiments of the present application include at least:

[0051] In the embodiment of the present application, two different single-hole blasting experiments are designed to obtain the first resistance line parameter value and the second resistance line parameter value, and then based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data, the target parameter value that affects the blasting effect of the set monitoring point is determined, and the peak vibration velocity and blasting vibration waveform function in the step group hole blasting are obtained according to the obtained target parameter value and the obtained first and second resistance line parameter values. It can be seen that in this process, the resistance line parameter value is introduced into the process of determining the peak vibration velocity and the blasting vibration waveform function, and by exploring the attenuation law of the resistance parameter value line influence coefficient on the blasting vibration velocity, the influence of the resistance line parameter value on the peak vibration velocity is quantitatively evaluated, and the improvement of the existing prediction formula is achieved, which greatly improves 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 the negative impact on the surrounding environment and buildings.

[0052] In addition, the present application also adjusts the delay time between holes and the delay time between rows through the interference vibration reduction method according to the blasting object category and safety guidelines, and then adjusts the superimposed blasting vibration waveform function according to the adjusted value range. At this time, not only can the interference vibration reduction effect of offsetting the peak and trough of the vibration wave be achieved, but also because different protection objects use different adjustment ranges, the determined blasting vibration waveform function and the blasting object will be more matched, thereby solving the problem of coordinated prevention and control of multiple protection objects, and ensuring that the blasting vibration will not cause damage to the surrounding protection objects. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0054] Figure 1 A schematic flow chart of a step blasting vibration waveform prediction method considering a resistance line value provided in an embodiment of the present application;

[0055] Figure 2 A diagram of a naked single-hole blasting experiment model provided in an embodiment of the present application;

[0056] Figure 3 A schematic diagram of the peak vibration speed provided in an embodiment of the present application;

[0057] Figure 4 A diagram of a step single-hole blasting experiment model provided in an embodiment of the present application;

[0058] Figure 5A diagram of a step group hole blasting model provided in an embodiment of the present application;

[0059] Figure 6 A schematic diagram of a blasthole charge structure provided in an embodiment of the present application;

[0060] Figure 7-1 A schematic diagram of a top view of a resistance line of a blast hole 1 in a step group hole blasting provided in an embodiment of the present application;

[0061] Figure 7-2 A schematic top view of the resistance line of the blast hole 2 in the step group hole blasting provided in the embodiment of the present application;

[0062] Figure 7-3 A schematic top view of the resistance line of the blast hole 6 in the step group hole blasting provided in the embodiment of the present application;

[0063] Figure 7-4 A schematic top view of the resistance line of the blast hole 7 in the step group hole blasting provided in the embodiment of the present application;

[0064] Figure 7-5 A schematic top view of the resistance lines of the blastholes 11 and 12 in the step group hole blasting provided in an embodiment of the present application;

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

[0066] Fig. 9 A schematic diagram of the structure of an electronic device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0067] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be interpreted as limiting the present invention.

[0068] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of the 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 refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0069] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

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

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

[0072] Step S101, obtaining first experimental data and first resistance line parameter values ​​corresponding to set monitoring points in an exposed single-hole blasting experiment, and second experimental data and second resistance line parameter values ​​corresponding to set monitoring points in a stepped single-hole blasting experiment.

[0073] Among them, exposed single-hole blasting refers to blasting a blasthole that is not in the step, while step single-hole blasting refers to blasting only one blasthole in the step, and the set monitoring point refers to the place that is susceptible to blasting vibration. Optionally, there are four main points to follow when selecting and setting monitoring points: 1. Make sure that this monitoring point can accurately capture the blasting vibration signal; 2. Select buildings of different types and structures as monitoring points; 3. Set up monitoring points in residential areas to evaluate the impact on residents' lives; 4. Select safe and easy-to-operate monitoring points. For example, hospitals, schools, residential buildings, and office buildings within 300m of the blasting area; scenic spots, important buildings (structures), and facilities within 500m of the blasting area; and particularly important buildings (structures), facilities within 1000m of the blasting area can be selected as set monitoring points.

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

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

[0076] Step S102, determining a target parameter value that affects the blasting effect of a set monitoring point according to the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data.

[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, a target parameter value that affects the blasting effect of the set monitoring point may be further determined.

[0078] In an optional embodiment of the present application, the target parameter value includes a first parameter value and a second 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, the target parameter value affecting the blasting effect of the set monitoring point is determined, including:

[0079] a first parameter value according to the first experimental data;

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

[0081] Among them, there are multiple factors affecting the blasting effect of the monitoring point, so there will naturally be multiple target parameters. The target parameter value in this application includes a first parameter value and a second parameter value, and the first parameter value and the second parameter value correspond to different influencing factors. Further, the first parameter value corresponding to the set monitoring point can be determined according to the first experimental data obtained, and then the second parameter value can be determined based on the first parameter value obtained and the first resistance line parameter value, the second resistance line parameter value and the second experimental data obtained from the previous blasting experiment.

[0082] In an optional embodiment of the present application, the first experimental data includes peak vibration velocity, explosion 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 a site condition correlation coefficient and an attenuation coefficient, the second parameter value is a resistance line influence coefficient, the second experimental data includes peak vibration velocity, explosion center distance and 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;

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

[0084]

[0085] Among them, R is the distance from the explosion center in the first experimental data, Q is the maximum single-shot charge in the first experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, and V0 is the peak vibration velocity in the first experimental data;

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

[0087]

[0088] Among them, R is the distance from the explosion center in the second experimental data, Q is the maximum single-shot charge in the second experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, V s is the peak vibration velocity in the second experimental data, β is the resistance line influence coefficient, is the second resistance line parameter value, Is the parameter value of the first resistance line.

[0089] Optionally, since the blast hole is not in a step during the exposed single blast hole blasting experiment, there will be no free surface (the free surface usually refers to the interface between the rock and soil medium and the air, and in this application, it refers to the surface between the blast hole plug and the air), so there is only a single resistance line parameter value, that is, the first resistance line parameter value. Furthermore, after the exposed single blast hole blasting experiment, the peak vibration velocity (expressed by V0), the explosion center distance (expressed by R) and the maximum single shot charge (i.e., Q) during this single blast hole blasting experiment can be obtained at each monitoring point.

[0090] For example, suppose the bare single-shot hole blasting experimental model is as follows Figure 2 As shown in the figure, the circle in the figure is a top view of the blasthole, and there are three monitoring points (i.e., measuring point 1, measuring point 2, and measuring point 3). Taking monitoring point 1 as an example, the distance from the blast center in the exposed single blasthole blasting experiment is shown as R in the figure. Further, after the experiment, the peak vibration velocity corresponding to each monitoring point is obtained (specifically, as shown in Figure 3 As shown), the explosion center distance and the maximum single-shot charge. At this time, the peak vibration velocity corresponding to each monitoring point can be processed by linear regression fitting through the least squares method, and the processed peak vibration velocity is used as the peak vibration velocity in the first experimental data. Similarly, the explosion center distance and the maximum single-shot charge in the first experimental data can be obtained.

[0091] Furthermore, the peak vibration velocity, the distance from the explosion center and the maximum single-shot charge in the first experimental data are substituted into the Sadovsky formula: The site condition correlation coefficient (expressed by k) and attenuation coefficient (expressed by α) are obtained.

[0092] Optionally, in the step single blasthole blasting experiment, since the blasthole is in the step, there will be three free surfaces for the blasthole, and then there will be three resistance line parameter values, which can be used respectively and W s 3 It indicates that, further, and Get the average resistance line parameter value (using express).

[0093] For example, suppose the step single-hole blasting experimental model is as follows Figure 4 As shown in the figure, the circle in the figure is the top view of the blasthole. There are three 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 blasthole blasting experiment of the step is shown as R in the figure. The three resistance line parameter values ​​are and (Not shown in the figure). Further, after the step single-hole blasting experiment, the peak vibration velocity (expressed as V) during this experiment can be obtained at each monitoring point. s It is understood that, because there are three monitoring points in the present application, it is also necessary to use the least square method to perform linear regression fitting processing on the distance to the center of explosion, the peak vibration velocity, the maximum single-shot charge and the average resistance line parameter value obtained at each monitoring point, and use the processed data as the second experimental data.

[0094] Further, the explosion center distance in the second experimental data, the maximum single-shot charge in the second experimental data, the site condition correlation coefficient, the attenuation coefficient, the peak vibration velocity in the second experimental data, the second resistance line parameter value and the first resistance line parameter value are substituted into the formula: The resistance line influence coefficient β (ie, the second parameter value) is obtained.

[0095] In an optional embodiment of the present application, the three free surfaces of the blasthole 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 blastholes in the step group hole blasting includes at least two rows and each row includes at least one blasthole, then:

[0096] The resistance line parameter value of the first blasthole in each row in the x direction is the hole spacing in the step group blasting, the resistance line parameter value in the y direction is the row spacing in the step group blasting, and the resistance line parameter value in the z direction is the distance from the surface of the blasthole blockage in contact with the air to the center of the explosive;

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

[0098] Optionally, in the present application, the number of rows of blastholes in the step group hole blasting includes at least two rows and each row includes at least one blasthole, and the three free surfaces of each blasthole are respectively 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 package to the top free surface). Further, 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 step group hole blasting, and the blasting radius (referring to the radius of the broken area formed by the rock mass after the explosion of the explosive in the blasthole, represented by d).

[0099] For example, assuming that the step group hole blasting model is shown in Figure 5, the row spacing in the step group hole blasting is represented by b, and the hole spacing is represented by a. At this time, the resistance line parameter value of the first blast hole in each row in the x direction is the hole spacing in the step group hole blasting (i.e. a), the resistance line parameter value in the y direction is the row spacing in the step group hole blasting (i.e. b), and the resistance line parameter value in the z direction is the distance from the surface of the blast hole plugging material in contact with the air to the center of the explosive. Starting from the second row of blast holes, the resistance line parameter values ​​of the second blast hole in each row and the subsequent blast holes in the x direction are all the difference between the hole spacing and the blasting radius (i.e. ad), the resistance line parameter values ​​in the y direction are all the difference between the row spacing and the blasting radius (i.e. bd), and the resistance line parameter values ​​in the z direction are all the distance from the surface of the blast hole plugging material in contact with the air to the center of the explosive.

[0100] Optional, such as Figure 6 As shown, the present embodiment provides a schematic diagram of the structure of a blasthole charge, wherein the diameter of the charge in the blasthole is represented by L1, and the diameter of the remaining part of the blasthole except the charge is represented by L2. At this time, the resistance line parameter value in the z direction can be represented by L1+L2 / 2. Optionally, as shown in FIG7 (including Figure 7-1 to Figure 7-5 ), the embodiment of the present application also provides a schematic diagram of the top view of the resistance line of each blast hole in the step group hole blasting. In FIG7, there are 3 rows of 15 blast holes, which are numbered 1 to 15. Figure 7-1 The resistance lines in the x direction and the y direction of the blasthole 1 are shown in FIG. and ), Figure 7-2 The resistance lines in the x direction and the y direction of the blasthole 2 are shown in FIG. and ), Figure 7-3 The resistance lines in the x direction and the y direction of the blast hole 6 are shown in FIG. and ), Figure 7-4 The resistance lines in the x direction and the y direction of the blast hole 7 are shown in FIG. and ), Figure 7-5 The resistance lines in the x direction and the y direction of the blast hole 11 are shown in FIG. and ), as well as the resistance line in the x direction and the resistance line in the y direction of the blasthole 12 (i.e. and ).

[0101] Step S103, determining the peak vibration velocity and blasting vibration waveform function of each blasthole in the step group hole blasting at a set monitoring point according to 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 hole is at least two blastholes in the step.

[0102] Optionally, for each blasthole in the step group hole blasting, the peak vibration velocity and blasting vibration waveform function of each blasthole at a 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 an optional embodiment of the present application, the peak vibration velocity and blasting vibration waveform function of each blast hole in the step group hole blasting at a set monitoring point are determined according to 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 blast hole in the step group hole blasting, the third experimental data corresponding to the blast hole is obtained, and the third experimental data includes the average resistance line parameter value, the explosion center distance and the maximum single-shot charge amount obtained according to the resistance line parameter values ​​corresponding to the three free surfaces of the blast hole; the peak vibration velocity of the blast hole at the set monitoring point is determined according to the first parameter value, the second parameter value, the first resistance line parameter value and the third experimental data;

[0105] 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 during the group hole step blasting is determined.

[0106] Optionally, in the step group hole blasting, for each blast hole, the resistance line parameter values ​​corresponding to the three free surfaces of the blast hole (i.e., the resistance line parameter value in the horizontal x direction, the resistance line parameter value in the vertical y direction, and the resistance line parameter value in the z direction) can be predetermined, and then the average resistance line parameter value of the three resistance line parameter values ​​can be calculated. At the same time, the explosion center distance and the maximum single-shot charge corresponding to the blast hole when the monitoring is set can also be obtained. Further, according to the above-determined first parameter value, second parameter value, first resistance line parameter value and the average resistance line parameter value, explosion center distance and maximum single-shot charge of the blast hole, the peak vibration velocity of the blast hole when the monitoring point is set is determined. At the same time, according to the second parameter value, the first resistance line parameter value and the first experimental data, the blasting vibration waveform function of the blast hole when the monitoring point is set can also be determined.

[0107] In an optional embodiment of the present application, for each blast hole in the step group hole blasting, the peak vibration velocity of the blast hole at the set monitoring point is determined by the following formula:

[0108]

[0109] Among them, R is the distance from the center of the nth blast hole, Q is the maximum single-shot charge of the nth blast hole, k is the site condition correlation coefficient, α is the attenuation coefficient, V n is the peak vibration velocity of the nth blasthole at the set monitoring point, β is the influence coefficient of the resistance line, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, Is the parameter value of the first resistance line.

[0110] Optionally, for the nth blasthole in the step group blasting, the blast center distance and the maximum single-shot charge corresponding to the nth blasthole at the set monitoring point can be obtained, as well as the average resistance line parameter value obtained based on the three resistance line parameter values ​​of the nth blasthole and the resistance line parameter value of the previously determined bare single blasthole blasting experiment (i.e., the first resistance line parameter value ), and then substitute it into the above formula to obtain the peak vibration velocity V of the nth blasthole at the set monitoring pointn .

[0111] In an optional embodiment of the present application, the first experimental data also includes a blasting vibration waveform function corresponding to a set monitoring point in an exposed 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:

[0112]

[0113] Among them, V n (t) is the blasting vibration waveform function of the nth blasthole at the set monitoring point, β is the resistance line influence coefficient, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the parameter value of the first resistance line, and V0(t) is the blasting vibration waveform function corresponding to the set monitoring point in the exposed single-hole blasting experiment.

[0114] Optionally, the first experimental data also includes the blasting vibration waveform function V0(t) corresponding to the set monitoring point in the exposed single blasthole blasting experiment, and for the nth blasthole in the step group hole blasting, the determined resistance line influence coefficient value can be obtained based on the average resistance line parameter value corresponding to the three free surfaces of the nth blasthole. First resistance line parameter value Substitute the blasting vibration waveform function V0(t) corresponding to the set monitoring point in the exposed single blast hole blasting experiment into the above formula to obtain the blasting vibration waveform function V of the nth blast hole at the set monitoring point n (t).

[0115] Step S104, superimposing the blasting vibration waveform function of each blasthole 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 blasthole at the set monitoring point, the blasting vibration waveform function of each blasthole 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 the present application, the blasting vibration waveform function of each blasthole at a set monitoring point can be superimposed by the following formula to obtain the blasting vibration waveform function corresponding to the set monitoring point:

[0118]

[0119] Among them, 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 blasthole at the set monitoring point, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, β is the resistance line influence coefficient, Δt n is the delay time between holes, Δt r is the delay time between rows, r is the number of rows of blast holes in the bench group blasting, is the parameter value of the first resistance line.

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

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

[0122] Obtain the category of blasting protection objects and blasting safety criteria;

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

[0124] According to the safety range of the blasting vibration waveform function and the safety range of the peak vibration velocity, the delay time between holes and the delay time between rows are adjusted by the interference vibration reduction method, and the value range of the delay time between holes and the value range of the delay time between rows are obtained;

[0125] According to the value range of the delay time between holes and the value range of the delay time between rows, the blasting vibration waveform function of each blast hole at the set monitoring point is superimposed.

[0126] Optionally, when superimposing the blasting vibration waveform function of each blasthole at the set monitoring point, it is necessary to consider the influence of the inter-hole delay time and the inter-row delay time. Therefore, it is necessary to determine the value range of the inter-hole delay time and the value range of the inter-row delay time when superimposing. Specifically, first clarify to which category the blasting protection object belongs, such as earth caves, adobe houses, rubble stone houses, general civil buildings, industrial and commercial buildings, ancient buildings and monuments, etc., and then find the safe allowable particle vibration velocity values ​​corresponding to different protection object categories according to the blasting safety criteria (such as the "Blasting Safety Regulations"). These values ​​are calculated according to the different vibration frequencies f (f≤10Hz, 10Hz<f≤50Hz、f> 50Hz). Furthermore, the obtained peak vibration velocity is subjected to spectrum analysis to determine the main vibration frequency, and compared with the values ​​in the blasting safety criteria to determine whether the main frequency and peak vibration velocity are within the allowable safety range. If not within the range, the delay time between holes and the delay time between rows can be adjusted according to the determined safety range through the interference vibration reduction method (such as when the delay time is selected as an odd multiple of the half-cycle of the blasting vibration wave, the interference vibration reduction effect of offsetting the peak and trough of the vibration wave can be achieved) to obtain the value range of the delay time between holes and the value range of the delay time between rows, and then the superimposed blasting vibration waveform function is adjusted according to the value range of the delay time between holes and the value range of the delay time between rows to ensure that the blasting vibration will not cause damage to the protected object.

[0127] Step S105, blasting the open-pit step based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blasthole at the set monitoring point.

[0128] Optionally, after obtaining the corresponding set test point, the peak vibration velocity of each blast hole at the set monitoring point can be determined based on the determined vibration waveform function.

[0129] In the embodiment of the present application, two different single-hole blasting experiments are designed to obtain the first resistance line parameter value and the second resistance line parameter value, and then based on the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data, the target parameter value that affects the blasting effect of the set monitoring point is determined, and the peak vibration velocity and blasting vibration waveform function in the step group hole blasting are obtained according to the obtained target parameter value and the obtained resistance line parameter value. It can be seen that in this process, the resistance line parameter value is introduced into the process of determining the peak vibration velocity and the 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, and the improvement of the existing prediction formula is achieved, which greatly improves 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 the negative impact on the surrounding environment and buildings.

[0130] The embodiment of the present application provides a step blasting vibration waveform prediction device taking into account 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] A data acquisition module is used to acquire first experimental data and a first resistance line parameter value corresponding to a set monitoring point in an exposed single-hole blasting experiment, and second experimental data and a second resistance line parameter value corresponding to a set monitoring point in a stepped single-hole blasting experiment;

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

[0133] A function superposition module is used to superimpose the blasting vibration waveform function of each blasthole at a set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point;

[0134] The step blasting module is used to blast the open-pit steps based on the blasting vibration waveform function corresponding to the set monitoring point and the peak vibration velocity of each blasthole at the set monitoring point.

[0135] Optionally, the target parameter value includes a first parameter value and a second parameter value, and when the data determination module determines the target parameter value affecting the blasting effect of the set monitoring point according to 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 to:

[0136] Determine a first parameter value according to the first experimental data;

[0137] The second parameter value is determined according to 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, explosion 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 a site condition correlation coefficient and an attenuation coefficient, the second parameter value is a resistance line influence coefficient, the second experimental data includes peak vibration velocity, explosion center distance and maximum single-shot charge, and the second resistance line parameter value is an average resistance line parameter value obtained based on the resistance line parameter values ​​corresponding to the three free surfaces;

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

[0140]

[0141] Among them, R is the distance from the explosion center in the first experimental data, Q is the maximum single-shot charge in the first experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, and V0 is the peak vibration velocity in the first experimental data;

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

[0143]

[0144] Among them, R is the distance from the explosion center in the second experimental data, Q is the maximum single-shot charge in the second experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, V s is the peak vibration velocity in the second experimental data, β is the resistance line influence coefficient, is the second resistance line parameter value, Is the parameter value of the first resistance line.

[0145] Optionally, when the data determination module determines the peak vibration velocity and blasting vibration waveform function of each blasthole in the step group hole blasting at a set monitoring point according to 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 to:

[0146] For each blast hole in the step group hole blasting, the third experimental data corresponding to the blast hole is obtained, and the third experimental data includes the average resistance line parameter value, the explosion center distance and the maximum single-shot charge amount obtained according to the resistance line parameter values ​​corresponding to the three free surfaces of the blast hole; the peak vibration velocity of the blast hole at the set monitoring point is determined according to the first parameter value, the second parameter value, the first resistance line parameter value and the third experimental data;

[0147] 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 during the group hole step blasting is determined.

[0148] Optionally, for each blast hole in the step group hole blasting, the peak vibration velocity of the blast hole at the set monitoring point is determined by the following formula:

[0149]

[0150] Among them, R is the distance from the center of the nth blast hole, Q is the maximum single-shot charge of the nth blast hole, k is the site condition correlation coefficient, α is the attenuation coefficient, V n is the peak vibration velocity of the nth blasthole at the set monitoring point, β is the influence coefficient of the resistance line, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the parameter value of the first resistance line.

[0151] Optionally, the first experimental data also includes a vibration waveform function corresponding to a set monitoring point in an exposed single blasthole blasting experiment, and the vibration waveform function of the blasthole at the set monitoring point is determined by the following formula:

[0152]

[0153] Among them, V n (t) is the blasting vibration waveform function of the nth blasthole at the set monitoring point, β is the resistance line influence coefficient, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the parameter value of the first resistance line, and V0(t) is the blasting vibration waveform function corresponding to the set monitoring point in the exposed single-hole blasting experiment.

[0154] Optionally, the blasting vibration waveform function of each blasthole at the set monitoring point is superimposed by the following formula to obtain the blasting vibration waveform function corresponding to the set monitoring point:

[0155]

[0156] Among them, 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 blasthole at the set monitoring point, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, β is the resistance line influence coefficient, Δt h is the delay time between holes, Δt r is the delay time between rows, r is the number of rows of blast holes in the bench group blasting, Is the parameter value of the first resistance line.

[0157] Optionally, after the function superposition module superimposes the blasting vibration waveform function of each blasthole at the set monitoring point to obtain the blasting vibration waveform function corresponding to the set monitoring point, it is also used to:

[0158] Obtain the category of blasting protection objects and blasting safety criteria;

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

[0160] According to the safety range of the blasting vibration waveform function and the safety range of the peak vibration velocity, the delay time between holes and the delay time between rows are adjusted by the interference vibration reduction method, and the value range of the delay time between holes and the value range of the delay time between rows are obtained;

[0161] According to the value range of the delay time between holes and the value range of the delay time between rows, the blasting vibration waveform function corresponding to the set monitoring point is adjusted.

[0162] Optionally, the set monitoring points include three set monitoring points, and the first experimental data, the second experimental data, the first resistance line parameter value and the second resistance line parameter value are all data corresponding to each monitoring point after linear regression fitting processing using the least squares method.

[0163] Optionally, the three free surfaces of the blastholes 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 blastholes in the step group hole blasting includes at least two rows and each row includes at least one blasthole, then:

[0164] The resistance line parameter value of the first blasthole in each row in the x direction is the hole spacing in the step group blasting, the resistance line parameter value in the y direction is the row spacing in the step group blasting, and the resistance line parameter value in the z direction is the distance from the surface of the blasthole blockage in contact with the air to the center of the explosive;

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

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

[0167] An embodiment of the present application provides an electronic device, and the electronic device in the embodiment of the present application includes: a processor; and a memory, the memory is configured to store machine-readable instructions, and when the instructions are executed by the processor, the processor executes a step blasting vibration waveform prediction method that takes into account the resistance line value.

[0168] The present application embodiment provides an electronic device, such as Fig. 9 As shown, Fig. 9 The electronic device 2000 shown includes: a processor 2001 and a memory 2003. The processor 2001 and the memory 2003 are connected, such as through a bus 2002. Optionally, the electronic device 2000 may also include a transceiver 2004. It should be noted that in actual applications, the transceiver 2004 is not limited to one, and the structure of the electronic device 2000 does not constitute a limitation on the embodiments of the present application.

[0169] Processor 2001 may be a CPU, a general-purpose processor, a DSP, an ASIC, an FPGA or other programmable logic device, a transistor logic device, a hardware component or any combination thereof. It may implement or execute 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 computing functions, such as a combination of one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0170] The bus 2002 may include a path to transmit information between the above components. The bus 2002 may be a PCI bus or an EISA bus, etc. The bus 2002 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Fig. 9 Only one thick line is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0171] The memory 2003 may be a ROM or other type of static storage device that can store static information and instructions, a RAM or other type of dynamic storage device that can store information and instructions, or an EEPROM, a CD-ROM or other optical disk storage, an optical disk storage (including a compressed optical disk, a laser disk, an optical disk, a digital versatile disk, a Blu-ray disk, etc.), a magnetic disk storage medium or other magnetic storage device, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but is not limited to these.

[0172] The memory 2003 is used to store the application code for executing the solution of the present application, and the execution is controlled by the processor 2001. The processor 2001 is used to execute the application code stored in the memory 2003 to implement Figure 8 The illustrated embodiment provides an 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 flowchart of the accompanying drawings are displayed in sequence as indicated by the arrows, these steps are not necessarily executed in sequence in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and they can be executed in other orders. Moreover, at least a part of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages, and these sub-steps or stages are not necessarily executed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed in turn or alternately with other steps or at least a part of the sub-steps or stages of other steps.

[0174] The above descriptions are only some embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A step blasting vibration waveform prediction method considering resistance line value, characterized in that: include: Acquire first experimental data and a first resistance line parameter value corresponding to a set monitoring point in an exposed single-hole blasting experiment, and second experimental data and a second resistance line parameter value corresponding to the set monitoring point in a stepped single-hole blasting experiment; Determining a target parameter value affecting a blasting effect of the set monitoring point according to the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data; Determine the peak vibration velocity and blasting vibration waveform function of each blast hole in the step group hole blasting at the set monitoring point according to 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 hole is at least two blast holes in the step; The blasting vibration waveform function of each blasthole at the set monitoring point is superimposed to obtain the blasting vibration waveform function corresponding to the set monitoring point; The open-pit steps are 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.

2. The method according to claim 1, characterized in that The target parameter value includes a first parameter value and a second parameter value, and determining the target parameter value affecting the blasting effect of the set monitoring point according to the first experimental data, the first resistance line parameter value, the second resistance line parameter value and the second experimental data includes: Determining the first parameter value according to the first experimental data; 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.

3. The method according to claim 2, characterized in that The first experimental data includes peak vibration velocity, explosion 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 a site condition correlation coefficient and an attenuation coefficient, the second parameter value is a resistance line influence coefficient, the second experimental data includes peak vibration velocity, explosion center distance and maximum single-shot charge, 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; The first parameter value is determined by the following formula: Wherein, R is the distance from the explosion center in the first experimental data, Q is the maximum single-shot charge in the first experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, and V0 is the peak vibration velocity in the first experimental data; The second parameter value is determined by the following formula: Where R is the distance from the explosion center in the second experimental data, Q is the maximum single-shot charge in the second experimental data, k is the site condition correlation coefficient, α is the attenuation coefficient, V s is the peak vibration velocity in the second experimental data, β is the resistance line influence coefficient, is the second resistance line parameter value, is the parameter value of the first resistance line.

4. The method according to claim 2, characterized in that: The step of determining the peak vibration velocity and the blasting vibration waveform function of each blast hole in the step group hole blasting at the set monitoring point according to the first resistance line parameter value, the second resistance line parameter value, the first experimental data and the target parameter value comprises: For each blast hole in the step group hole blasting, third experimental data corresponding to the blast hole is obtained, wherein the third experimental data includes an average resistance line parameter value, a blast center distance and a maximum single-shot charge amount obtained according to the resistance line parameter values ​​corresponding to the three free surfaces of the blast hole; and a peak vibration velocity of the blast hole at the set monitoring point is determined according to the first parameter value, the second parameter value, the first resistance line parameter value and the third experimental data; 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 during group hole step blasting is determined.

5. The method according to claim 4, characterized in that For each blast hole in the step group hole blasting, the peak vibration velocity of the blast hole at the set monitoring point is determined by the following formula: Among them, R is the distance from the center of the nth blast hole, Q is the maximum single-shot charge of the nth blast hole, k is the site condition correlation coefficient, α is the attenuation coefficient, V n is the peak vibration velocity of the nth blasthole at the set monitoring point, β is the resistance line influence coefficient, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the parameter value of the first resistance line.

6. The method according to claim 4, characterized in that The first experimental data also includes a blasting vibration waveform function corresponding to the set monitoring point in the exposed 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: Among them, V n (t) is the blasting vibration waveform function of the nth blasthole at the set monitoring point, β is the resistance line influence coefficient, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, is the first resistance line parameter value, and V0(t) is the blasting vibration waveform function corresponding to the set monitoring point in the exposed single-hole blasting experiment.

7. The method according to claim 6, characterized in that The blasting vibration waveform function of each blasthole at the set monitoring point is superimposed by the following formula to obtain the blasting vibration waveform function corresponding to the set monitoring point: Wherein, 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 blasthole at the set monitoring point, is the average resistance line parameter value obtained from the resistance line parameter values ​​corresponding to the three free surfaces of the nth blasthole, β is the resistance line influence coefficient, Δt h is the delay time between holes, Δt r is the delay time between rows, r is the number of rows of blast holes in the bench group blasting, is the parameter value of the first resistance line.

8. The method according to claim 7, characterized in that After superimposing 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, the method further includes: Obtain the categories of blasting protection objects and blasting safety criteria; Determining the safety range of the blasting vibration waveform function and the safety range of the peak vibration velocity corresponding to the set monitoring point according to the category of the blasting protection object and the blasting safety criterion; According to the safety range of the blasting vibration waveform function and the safety range of the peak vibration velocity, the inter-hole delay time and the inter-row delay time are adjusted by an interference vibration reduction method to obtain a value range of the inter-hole delay time and a value range of the inter-row delay time; According to the value range of the inter-hole delay time and the value range of the inter-row delay time, the blasting vibration waveform function corresponding to the set monitoring point is adjusted.

9. The method according to claim 1, characterized in that: The set monitoring points include three set monitoring points, and the first experimental data, the second experimental data, the first resistance line parameter value and the second resistance line parameter value are all data corresponding to each monitoring point after linear regression fitting processing using the least squares method.

10. The method according to claim 3, characterized in that: The three free surfaces of the blastholes 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 blastholes in the step group hole blasting includes at least two rows and each row includes at least one blasthole, then: The resistance line parameter value of the first blasthole in each row in the x direction is the hole spacing in the step group blasting, the resistance line parameter value in the y direction is the row spacing in the step group blasting, and the resistance line parameter value in the z direction is the distance from the surface of the blasthole plugging object in contact with the air to the center of the explosive; Starting from the second row of blast holes, the resistance line parameter values ​​of the second blast hole in each row and subsequent blast holes in the x direction are the difference between the hole spacing and the blasting radius, the resistance line parameter values ​​in the y direction are the difference between the row spacing and the blasting radius, and the resistance line parameter values ​​in the z direction are the distance from the surface of the blast hole blockage in contact with the air to the center of the explosive.

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