Construction method of non-coupling blasting load model and related equipment

Abstract

The invention provides a construction method of a non-coupling blasting explosion load model and related equipment, and the method comprises the steps: describing non-coupling blasting explosion loads at different time stages through piecewise functions, and building a non-coupling blasting explosion load theoretical model; a pressure-time curve is collected through a non-coupling bursting pressure test, waveform analysis is carried out, and mechanical parameters are obtained; calibrating various parameters in the non-coupling blasting load theoretical model through mechanical parameters; various parameters in the non-coupling blasting explosion load theoretical model are input into a calculation program for calculation, and a non-coupling blasting explosion load model is obtained; the model provided by the invention can more accurately describe the action characteristics of the non-coupling blasting load, the peak values and the loading rates of the blasting shock waves and the blasting gas are directly controlled by respectively inputting the peak values and the rising time, so that the dynamic response of the structure under different peak values and loading rates can be conveniently researched, and the model has the advantages of simple model, high reliability and the like. The input parameters are few, and the applicability is wide.

Description

Technical Field

[0001] The invention relates to the technical field of explosion impact dynamics, and in particular to a method for constructing an uncoupled blasting load model and related equipment. Background Art

[0002] Uncoupled blasting refers to blasting in which there is a filling medium between the explosive and the blasted structure. In uncoupled blasting, the high-speed and high-pressure explosive gas generated after the detonation of the explosive first compresses the filling medium, arouses a rapidly rising explosion shock wave in the filling medium and quickly acts on the blasted structure through the filling medium, and then the explosive gas acts on the blasted structure through the filling medium, instead of the direct contact between the explosive and the blasted structure as in coupled blasting, where the explosion shock wave and the explosive gas act on the blasted structure at the same time. Therefore, the explosion loads of uncoupled blasting and coupled blasting are very different.

[0003] Non-fluid-solid coupling blasting numerical calculation refers to the direct application of the blast load curve to the structural surface of the finite element model for related numerical analysis. Compared with the fluid-solid coupling method, non-fluid-solid coupling blasting numerical analysis has the advantages of convenient parameter adjustment and fast calculation speed. It has gradually become the main method for studying the dynamic response of structures under blast loads. The accuracy of non-fluid-solid coupling numerical analysis of structures depends on whether the applied blast load is consistent with the actual blast load. Therefore, it is crucial to accurately describe the action law and parameters of the load.

[0004] At present, most of the researches at home and abroad use trigonometric functions, double exponential functions and other models as the explosion loads for determining the explosion loads of uncoupled blasting. However, these commonly used explosion load models are all approximate and simplified treatments of the change process of the explosion loads, ignoring the dynamic and quasi-static effects of the explosion gas, and cannot simultaneously describe the joint effects of the explosion shock wave and the explosion gas, and therefore cannot truly reflect the change process of the explosion loads of uncoupled blasting. Summary of the invention

[0005] The present invention provides a method for constructing an uncoupled blasting explosion load model and related equipment, the purpose of which is to more accurately describe the action characteristics of the uncoupled blasting explosion load.

[0006] In order to achieve the above object, the present invention provides a method for constructing an uncoupled blasting load model, comprising:

[0007] Step 1, using piecewise functions to describe the uncoupled blasting loads at different time stages, and establishing a theoretical model of uncoupled blasting loads;

[0008] Step 2, collecting a pressure-time curve through an uncoupled burst pressure test experiment;

[0009] Step 3, performing waveform analysis on the pressure-time curve to obtain mechanical parameters, which include the rise time and pressure peak of the explosion shock wave and the explosion gas;

[0010] Step 4, calibrating various parameters in the uncoupled blasting explosion load theoretical model by mechanical parameters, wherein the various parameters in the uncoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the pressure peak of the explosion shock wave, the start time of the explosion gas, the rise time of the explosion gas, and the pressure peak of the explosion gas;

[0011] Step 5, inputting various parameters in the uncoupled blasting explosion load theoretical model into a calculation program for calculation, and obtaining an uncoupled blasting explosion load time curve as an uncoupled blasting explosion load model.

[0012] To further explain, the theoretical model of uncoupled blasting blast load is:

[0013]

[0014] Where P represents the explosion load acting on the exploded structure surface in uncoupled blasting, t represents time, P1 represents the peak pressure of the explosion shock wave, and t a represents the starting time of the explosive gas, α represents the correlation coefficient of the explosion shock wave rise time, t1 represents the coefficient of the explosion shock wave rise time, P2 represents the peak pressure of the explosion gas, and β represents the correlation coefficient of the explosion gas rise time. t2 represents the rising time of the explosion gas.

[0015] More specifically, step 2 includes:

[0016] Select a target location on the rock as the test site;

[0017] Acquiring test boreholes on the test site by down-the-hole drilling rig;

[0018] The polyvinylidene fluoride sensor is fixedly installed on the lower surface of the hole wall of the test borehole;

[0019] Place an emulsion explosive weighing 0.1kg and 32mm in diameter at 1.0m from the opening of the test borehole, and connect the emulsion explosive to the detonator. The distance from the test point to the center of the emulsion explosive is 0.1m.

[0020] The input end of the charge mode measurement circuit is connected to the output end of the polyvinylidene fluoride sensor, the output end of the charge mode measurement circuit is connected to the input end of the acquisition instrument, and the emulsion explosive is detonated by the detonator to perform an uncoupled blasting pressure test to obtain a voltage signal;

[0021] The voltage signal is calculated to obtain the pressure-time curve.

[0022] Specifically, target locations for selecting rocks include:

[0023] Select the target rock;

[0024] A location with a firmness coefficient greater than 8 and a rock quality grade of more than 80% is selected as the target location on the target rock.

[0025] Further, according to the pressure response formula The voltage signal is calculated to obtain a pressure-time curve, where Q represents the pressure measured by the polyvinylidene fluoride sensor, K represents the piezoelectric constant, A represents the sensor area, C represents the parallel capacitance of the charge model, and U represents the voltage signal.

[0026] Further, the PVDF sensor generates a voltage signal which is input into a charge mode measurement circuit.

[0027] Furthermore, the uncoupled blasting load model has two peaks. The peak with a relatively shorter rise time is the explosion shock wave load, and the peak with a relatively longer rise time is the explosion gas load.

[0028] The present invention also provides a device for constructing an uncoupled blasting explosion load model, comprising:

[0029] Establish a module for describing the uncoupled blasting loads at different time stages through piecewise functions, and establish a theoretical model of uncoupled blasting loads;

[0030] An acquisition module is used to acquire a pressure-time curve through an uncoupled burst pressure test experiment;

[0031] An analysis module is used to perform waveform analysis on the pressure-time curve to obtain mechanical parameters, including the rise time and pressure peak of the explosion shock wave and the explosion gas;

[0032] The calibration module is used to calibrate various parameters in the uncoupled blasting explosion load theoretical model through mechanical parameters. The various parameters in the uncoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the pressure peak of the explosion shock wave, the start time of the explosion gas, the rise time of the explosion gas, and the pressure peak of the explosion gas;

[0033] The calculation module is used to input various parameters in the uncoupled blasting explosion load theoretical model into the calculation program for calculation, and obtain the uncoupled blasting explosion load time curve as the uncoupled blasting explosion load model.

[0034] The present invention also provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, a method for constructing an uncoupled blasting explosion load model is implemented.

[0035] The present invention also provides a computer-readable storage medium, which stores a computer program. When the computer program is executed by a processor, a method for constructing an uncoupled blasting explosion load model is implemented.

[0036] The above scheme of the present invention has the following beneficial effects:

[0037] The invention describes the uncoupled blasting explosion load at different time stages by piecewise functions to establish the uncoupled blasting explosion load theoretical model; collects the pressure time curve by uncoupled blasting pressure test; performs waveform analysis on the pressure time curve to obtain mechanical parameters; calibrates various parameters in the uncoupled blasting explosion load theoretical model by mechanical parameters; inputs various parameters in the uncoupled blasting explosion load theoretical model into a calculation program for calculation, and obtains the uncoupled blasting explosion load time curve as the uncoupled blasting explosion load model; the uncoupled blasting explosion load model established by the invention considers the explosion shock wave and the explosion gas load at the same time, and can more accurately describe the action characteristics of the uncoupled blasting explosion load compared with the prior art, and can directly control the peak value and loading rate of the explosion shock wave and the explosion gas by respectively inputting the peak value and the rise time, so that the dynamic response of the structure under different peak values ​​and loading rates can be conveniently studied, and has the characteristics of simple model, few input parameters and wide applicability.

[0038] Other beneficial effects of the present invention will be described in detail in the subsequent specific implementation section. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 It is a schematic diagram of a flow chart of an embodiment of the present invention;

[0040] Figure 2 It is a schematic diagram of an uncoupled bursting pressure test experiment in an embodiment of the present invention;

[0041] Figure 3 It is a schematic diagram of an uncoupled blasting explosion load model in an embodiment of the present invention;

[0042] Figure 4 It is a schematic diagram of the structure of the construction device of the uncoupled blasting explosion load model;

[0043] Figure 5 Schematic diagram of the structure of a terminal device in an embodiment of the present invention.

[0044] The accompanying drawings are marked as follows:

[0045] 1- Target rock 2- Test borehole 3- Polyvinylidene fluoride sensor 4- Emulsion explosive. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will be described in detail with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0048] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a locking connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0049] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0050] In view of the existing problems, the present invention provides a method for constructing an uncoupled blasting explosion load model and related equipment.

[0051] like Figure 1 As shown, an embodiment of the present invention provides a method for constructing an uncoupled blasting load model, comprising:

[0052] Step 1, using piecewise functions to describe the uncoupled blasting loads at different time stages, and establishing a theoretical model of uncoupled blasting loads;

[0053] Step 2, collecting a pressure-time curve through an uncoupled burst pressure test experiment;

[0054] Step 3, performing waveform analysis on the pressure-time curve to obtain mechanical parameters, which include the rise time and pressure peak of the explosion shock wave and the explosion gas;

[0055] Step 4, calibrating various parameters in the uncoupled blasting explosion load theoretical model by mechanical parameters, wherein the various parameters in the uncoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the pressure peak of the explosion shock wave, the start time of the explosion gas, the rise time of the explosion gas, and the pressure peak of the explosion gas;

[0056] Step 5, inputting various parameters in the uncoupled blasting explosion load theoretical model into a calculation program for calculation, and obtaining an uncoupled blasting explosion load time curve as an uncoupled blasting explosion load model.

[0057] Most preferably, the uncoupled blasting blast load theoretical model is:

[0058]

[0059] Where P represents the explosion load acting on the exploded structure surface in uncoupled blasting, t represents time, P1 represents the peak pressure of the explosion shock wave, and t a represents the starting time of the explosive gas, α represents the correlation coefficient of the explosion shock wave rise time, t1 represents the coefficient of the explosion shock wave rise time, P2 represents the peak pressure of the explosion gas, and β represents the correlation coefficient of the explosion gas rise time. t2 represents the rising time of the explosion gas.

[0060] According to the above uncoupled blasting load theory model, t a It indicates the time when the explosion gas starts to act. It is used to reflect the difference between the explosion shock wave and the start time of the explosion gas. When t is less than 0, P is equal to 0, indicating that there is no explosion load. When 0≤t≤t a When t>t a When , P is represented by the load of two double exponential functions superimposed, indicating that this stage is caused by the combined action of explosion shock wave and explosion gas.

[0061] Specifically, step 2 includes:

[0062] Select a target location on the rock as the test site;

[0063] Acquiring test boreholes on the test site by down-the-hole drilling rig;

[0064] The polyvinylidene fluoride sensor is fixedly installed on the lower surface of the hole wall of the test borehole;

[0065] Place an emulsion explosive weighing 0.1kg and 32mm in diameter at 1.0m from the opening of the test borehole, and connect the emulsion explosive to the detonator. The distance from the test point to the center of the emulsion explosive is 0.1m.

[0066] The input end of the charge mode measurement circuit is connected to the output end of the polyvinylidene fluoride sensor, the output end of the charge mode measurement circuit is connected to the input end of the acquisition instrument, and the emulsion explosive is detonated by the detonator to perform an uncoupled blasting pressure test to obtain a voltage signal;

[0067] The voltage signal is calculated to obtain the pressure-time curve.

[0068] In the embodiment of the present invention, Figure 2 As shown, a target rock 1 is selected, and a position with a firmness coefficient greater than 8 and a rock quality grade of more than 80% is selected on the target rock 1 as the target position; a test borehole 2 with a depth of 4m and a diameter of 90mm is obtained by a down-the-hole drill, and a polyvinylidene fluoride sensor 3 is used to measure the inner wall pressure of the test borehole 2. After the polyvinylidene fluoride sensor 3 is connected to the charge model measurement circuit, it is glued to the hole wall of the test borehole 2 by glue. After the glue is firmly attached, an emulsion explosive 4 with a weight of 0.1kg and a diameter of 32mm is placed 1.0m away from the orifice of the test borehole 2, and the emulsion explosive 4 is connected to the detonator, and the distance from the test point to the center of the emulsion explosive 4 is 0.1m; a charge mode measurement circuit is selected, and the parallel capacitor size in the charge mode measurement circuit is 50nf. After the equipment used for measurement is debugged, the emulsion explosive 4 is detonated, and the voltage signal received by the charge mode measurement circuit is recorded and saved by the acquisition instrument, and the test data is obtained and the test data is calculated to obtain the pressure time curve.

[0069] Specifically, according to the pressure response formula The test data are calculated, where Q represents the pressure measured by the polyvinylidene fluoride sensor, K represents the piezoelectric constant, A represents the sensor area, C represents the parallel capacitance of the charge model, and U represents the voltage signal.

[0070] Most preferably, the polyvinylidene fluoride sensor 3 inputs the generated voltage signal into a charge mode measurement circuit.

[0071] The polyvinylidene fluoride sensor 3 used in the embodiment of the present invention is a ferroelectric material with a piezoelectric effect, that is, when the material is deformed under pressure, an electric charge will be generated on its surface. According to this principle, when the explosion impact applies pressure to the sensor, the polyvinylidene fluoride (PVDF) film inside the sensor will deform, causing the positive and negative charge centers inside it to shift relative to each other, thereby generating electric charges on the surface of the PVDF film. These charges can be collected and converted into electrical signals through conductive ink or metal electrodes, and the electrical signals are further output to the charge mode measurement circuit. It has the advantages of high sensitivity, good biocompatibility, wear resistance, anti-interference, light weight and portability, and a wide temperature range.

[0072] From the definition of model parameters in the uncoupled blasting load model, it can be seen that by analyzing the pressure-time curve, only five parameters need to be obtained, namely the rise time and peak value of the air shock wave, the rise time of the explosion gas, the start time and peak value of the explosion gas.

[0073] Specifically, step 3 includes:

[0074] According to the uncoupled charge blasting principle and the characteristics of the uncoupled blasting explosion load model, in the pressure-time curve obtained in the test, the first peak with a relatively short rise time is the explosion shock wave load, and the second peak with a relatively long rise time is the explosion gas load. Among them, the peak value of the air shock wave is the maximum pressure of the first waveform with a shorter rise time, and the peak value of the explosion gas is the maximum pressure of the second waveform with a longer rise time. The rise time of the explosion shock wave and the explosion gas can be calculated by counting the time required from the initial rise to the peak pressure, and the explosion gas start time is the difference between the explosion gas start rise time and the air shock wave end time.

[0075] Specifically, through the above waveform analysis, the five parameters required for the model are obtained, and the parameters can be calibrated by substituting them into the equation.

[0076] In the embodiment of the present invention, the calculation program described in step 5 is a Matlab calculation program, and the various parameters in the uncoupled blasting explosion load theoretical model are input into the Matlab calculation program to output the uncoupled blasting explosion load change history; the embodiment of the present invention assumes that the explosion shock wave rise time t1 is 200us, the explosion shock wave peak value P1 is 100MPa, and the explosion gas starts to act time t a is 1ms, the explosion gas rise time t2 is 5ms, and the explosion gas peak value P2 is 300MPa. Figure 3 The uncoupled blasting load model shown in Figure 1 is used in the numerical simulation of non-fluid-solid coupled rock blasting. It can be directly applied to the blasthole wall or equivalent excavation surface for blasting dynamic analysis. Figure 3 It can be seen that the uncoupled blasting load model has two peaks. The peak with a relatively shorter rise time is the explosion shock wave load, and the peak with a relatively longer rise time is the explosion gas load.

[0077] The embodiment of the present invention describes the uncoupled blasting explosion load at different time stages through piecewise functions to establish an uncoupled blasting explosion load theoretical model; collects pressure-time curves through uncoupled blasting pressure test experiments; performs waveform analysis on the pressure-time curve to obtain mechanical parameters; calibrates various parameters in the uncoupled blasting explosion load theoretical model through mechanical parameters; inputs various parameters in the uncoupled blasting explosion load theoretical model into a calculation program for calculation, and obtains an uncoupled blasting explosion load time curve as an uncoupled blasting explosion load model; the uncoupled blasting explosion load model established by the embodiment of the present invention takes into account the explosion shock wave and the explosion gas load at the same time, and can more accurately describe the action characteristics of the uncoupled blasting explosion load compared with the prior art, and can directly control the peak value and loading rate of the explosion shock wave and the explosion gas by respectively inputting the peak value and rise time, so that the dynamic response of the structure under different peak values ​​and loading rates can be conveniently studied, and has the characteristics of simple model, few input parameters and wide applicability.

[0078] The embodiment of the present invention also provides a device for constructing an uncoupled blasting load model, such as Figure 4 As shown, the construction device 100 includes:

[0079] Establishing module 101, for describing the uncoupled blasting blasting loads at different time stages respectively by piecewise functions, and establishing the uncoupled blasting blasting load theoretical model;

[0080] The acquisition module 102 is used to acquire a pressure-time curve through an uncoupled burst pressure test experiment;

[0081] An analysis module 103 is used to perform waveform analysis on the pressure-time curve to obtain mechanical parameters, including the rise time and pressure peak of the explosion shock wave and the explosion gas;

[0082] The calibration module 104 is used to calibrate various parameters in the uncoupled blasting explosion load theoretical model through mechanical parameters, and the various parameters in the uncoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the pressure peak of the explosion shock wave, the start time of the explosion gas, the rise time of the explosion gas, and the pressure peak of the explosion gas;

[0083] The calculation module 105 is used to input various parameters in the uncoupled blasting explosion load theoretical model into the calculation program for calculation, and obtain the uncoupled blasting explosion load time curve as the uncoupled blasting explosion load model.

[0084] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0085] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0086] The embodiment of the present invention also provides a terminal device, such as Figure 5 As shown, the terminal device D10 of this embodiment includes: at least one processor D100 ( Figure 5 Only one processor is shown in the figure), a memory D101, and a computer program D102 stored in the memory D101 and executable on the at least one processor D100, the processor D100 implements the steps of the above-mentioned method for constructing the uncoupled blasting load model when executing the computer program D102. Alternatively, the processor D100 implements the functions of each module / unit in the above-mentioned device embodiments when executing the computer program D102.

[0087] The terminal device D10 may be a computing device such as a desktop computer, a notebook, a PDA, a server, a server cluster, a cloud server, etc. The terminal device may include, but is not limited to, a processor D100 and a memory D101. Those skilled in the art will appreciate that Figure 5 This is only an example of the terminal device D10 and does not constitute a limitation on the terminal device D10. The terminal device D10 may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, it may also include input and output devices, network access devices, etc.

[0088] The processor D100 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0089] In some embodiments, the memory D101 may be an internal storage unit of the terminal device D10, such as a hard disk or memory of the terminal device D10. In other embodiments, the memory D101 may also be an external storage device of the terminal device D10, such as a plug-in hard disk, a smart memory card (SMC, SmartMedia Card), a secure digital (SD, Secure Digital) card, a flash card (Flash Card), etc. equipped on the terminal device D10. Further, the memory D101 may also include both an internal storage unit of the terminal device D10 and an external storage device. The memory D101 is used to store an operating system, an application program, a boot loader (BootLoader), data and other programs, such as the program code of the computer program, etc. The memory D101 may also be used to temporarily store data that has been output or is to be output.

[0090] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0091] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0092] An embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, a method for constructing an uncoupled blasting explosion load model is implemented.

[0093] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the construction device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, computer-readable media cannot be electric carrier signals and telecommunication signals.

[0094] The above is a preferred embodiment 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 method for constructing an uncoupled blasting load model, characterized in that: include: Step 1, using piecewise functions to describe the uncoupled blasting loads at different time stages, and establishing a theoretical model of uncoupled blasting loads; Step 2, collecting a pressure-time curve through an uncoupled burst pressure test experiment; Step 3, performing waveform analysis on the pressure-time curve to obtain mechanical parameters, wherein the mechanical parameters include the rise time and pressure peak of the explosion shock wave and the explosion gas; Step 4, calibrating various parameters in the uncoupled blasting explosion load theoretical model by using the mechanical parameters, wherein the various parameters in the uncoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the pressure peak of the explosion shock wave, the start time of the explosion gas, the rise time of the explosion gas, and the pressure peak of the explosion gas; Step 5: Input various parameters in the uncoupled blasting explosion load theoretical model into a calculation program for calculation, and obtain an uncoupled blasting explosion load time curve as an uncoupled blasting explosion load model.

2. The method for constructing an uncoupled blasting load model according to claim 1, characterized in that: The theoretical model of the uncoupled blasting blast load is: Where P represents the explosion load acting on the exploded structure surface in uncoupled blasting, t represents time, P1 represents the peak pressure of the explosion shock wave, and t a represents the starting time of the explosive gas, α represents the correlation coefficient of the explosion shock wave rise time, t1 represents the coefficient of the explosion shock wave rise time, P2 represents the peak pressure of the explosion gas, and β represents the correlation coefficient of the explosion gas rise time. t2 represents the rising time of the explosion gas.

3. The method for constructing an uncoupled blasting load model according to claim 2, characterized in that: Step 2 includes: Select a target location on the rock as the test site; Acquire a test borehole on the test site by a down-the-hole drill; The polyvinylidene fluoride sensor is fixedly mounted on the lower surface of the hole wall of the test borehole; An emulsion explosive weighing 0.1 kg and having a diameter of 32 mm is placed 1.0 m away from the opening of the test borehole, and the emulsion explosive is connected to a detonator, and the distance from the test point to the center of the emulsion explosive is 0.1 m; The input end of the charge mode measurement circuit is connected to the output end of the polyvinylidene fluoride sensor, the output end of the charge mode measurement circuit is connected to the input end of the acquisition instrument, and the emulsion explosive is detonated by the detonator to perform an uncoupled blasting pressure test to obtain a voltage signal; The voltage signal is calculated to obtain a pressure-time curve.

4. The method for constructing an uncoupled blasting load model according to claim 3, characterized in that: Target locations for selecting rocks include: Select the target rock; A position with a firmness coefficient greater than 8 and a rock quality grade of more than 80% is selected as the target position on the target rock.

5. The method for constructing an uncoupled blasting load model according to claim 4, characterized in that: According to the pressure response formula The voltage signal is calculated to obtain a pressure-time curve, wherein Q represents the pressure measured by the polyvinylidene fluoride sensor, K represents the piezoelectric constant, A represents the sensor area, C represents the parallel capacitance of the charge model, and U represents the voltage signal.

6. The method for constructing an uncoupled blasting load model according to claim 5, characterized in that: The polyvinylidene fluoride sensor inputs the generated voltage signal into a charge mode measurement circuit.

7. The method for constructing an uncoupled blasting load model according to claim 6, characterized in that: The uncoupled blasting explosion load model has two peaks, the peak with a relatively shorter rise time is the explosion shock wave load, and the peak with a relatively longer rise time is the explosion gas load.

8. A device for constructing an uncoupled blasting load model, characterized in that: include: Establish a module for describing the uncoupled blasting loads at different time stages through piecewise functions, and establish a theoretical model of uncoupled blasting loads; An acquisition module is used to acquire a pressure-time curve through an uncoupled burst pressure test experiment; An analysis module is used to perform waveform analysis on the pressure-time curve to obtain mechanical parameters, wherein the mechanical parameters include the rise time and pressure peak of the explosion shock wave and the explosion gas; A calibration module, used for calibrating various parameters in the uncoupled blasting explosion load theoretical model by using the mechanical parameters, wherein the various parameters in the uncoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the pressure peak of the explosion shock wave, the start time of the explosion gas, the rise time of the explosion gas, and the pressure peak of the explosion gas; The calculation module is used to input various parameters in the uncoupled blasting explosion load theoretical model into a calculation program for calculation, and obtain an uncoupled blasting explosion load time curve as an uncoupled blasting explosion load model.

9. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the method for constructing the uncoupled blasting and explosion load model according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for constructing an uncoupled blasting load model according to any one of claims 1 to 7 is implemented.

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