A construction method for a decoupled blasting explosion load model and related equipment

Abstract

The present invention provides a method for constructing an uncoupled blasting explosion load model and related equipment. By using piecewise functions to describe the uncoupled blasting explosion load in different time stages respectively, an uncoupled blasting explosion load theoretical model is established; through the uncoupled blasting pressure test experiment, the pressure-time curve is collected and waveform analysis is carried out to obtain mechanical parameters; the parameters in the uncoupled blasting explosion load theoretical model are calibrated by the mechanical parameters; the parameters in the uncoupled blasting explosion load theoretical model are input into a calculation program for calculation to obtain the uncoupled blasting explosion load model. The model provided by the present invention can more accurately describe the action characteristics of the uncoupled blasting explosion load. By directly inputting the peak value and the rise time respectively, the peak value and the loading rate of the explosion shock wave and the explosion-generated gas can be controlled, so that the dynamic response of the structure under different peak values and loading rates can be conveniently studied. It has the characteristics of simple model, few input parameters and wide applicability.

Description

Technical Field

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

[0002] Uncoupled blasting refers to blasting where there is a filling medium between the explosive and the structure to be blasted. In uncoupled blasting, the high-speed and high-pressure explosive-generated gas produced after the explosive detonates first compresses the filling medium, generating a rapidly rising explosion shock wave in the filling medium and quickly acting on the structure to be blasted through the filling medium. Then, the explosive-generated gas acts on the structure to be blasted through the filling medium, rather than the explosive being in direct contact with the structure to be blasted as in coupled blasting, where the explosion shock wave and the explosive-generated gas act on the structure to be blasted simultaneously. Therefore, the explosion loads of uncoupled blasting and coupled blasting are very different.

[0003] Non-fluid-structure interaction blasting numerical calculation means that the explosion load curve is directly applied to the surface of the structure in the finite element model for relevant numerical analysis. Compared with the fluid-structure interaction method, non-fluid-structure interaction blasting numerical analysis has the advantages of convenient parameter adjustment and fast calculation speed, and has gradually become the main method for studying the dynamic response of structures under explosion loads. The accuracy of non-fluid-structure interaction numerical analysis of structures depends on whether the applied explosion load is consistent with the actual explosion load. Therefore, accurately describing the action law and parameters of the load is crucial.

[0004] Currently, in domestic and foreign research, for the determination of the explosion load of uncoupled blasting, most use models such as trigonometric functions and double-exponential functions as the explosion load. However, these commonly used explosion load models are all approximate simplified treatments of the explosion load change process, ignoring the dynamic and quasi-static effects of the explosive-generated gas, unable to describe the combined action of the explosion shock wave and the explosive-generated gas simultaneously, and thus unable to truly reflect the change process of the explosion load 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, aiming to more accurately describe the action characteristics of the uncoupled blasting explosion load.

[0006] To achieve the above purpose, the present invention provides a method for constructing an uncoupled blasting explosion load model, including:

[0007] Step 1, describing the uncoupled blasting explosion load in different time stages through piecewise functions respectively, and establishing a theoretical model of the uncoupled blasting explosion load;

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

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

[0010] Step 4: Calibrate the parameters in the decoupled blasting explosion load theoretical model through the mechanical parameters. The parameters in the decoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the peak pressure of the explosion shock wave, the starting time of the detonation gas, the rise time of the detonation gas, and the peak pressure of the detonation gas.

[0011] Step 5: Input the parameters in the decoupled blasting explosion load theoretical model into a calculation program for calculation to obtain the decoupled blasting explosion load time curve as the decoupled blasting explosion load model.

[0012] Furthermore, the decoupled blasting explosion load theoretical model is as follows:

[0013]

[0014] Among them, P represents the explosion load acting on the blasted structural surface in decoupled blasting, t represents time, P1 represents the peak pressure of the explosion shock wave, t a represents the starting time of the detonation 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 detonation gas, β represents the correlation coefficient of the detonation gas rise time, t2 represents the rise time of the detonation gas.

[0015] Furthermore, Step 2 includes:

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

[0017] Obtain test drill holes on the test site through a down-the-hole drill;

[0018] Fix and install a polyvinylidene fluoride sensor on the lower surface of the hole wall of the test drill hole;

[0019] Place an emulsion explosive with a weight of 0.1 kg and a diameter of 32 mm at a distance of 1.0 m from the hole mouth of the test drill hole, connect the emulsion explosive to the detonator, and the distance from the test point to the center of the emulsion explosive is 0.1 m;

[0020] Connect the input end of the charge mode measurement circuit to the output end of the polyvinylidene fluoride sensor, connect the output end of the charge model measurement circuit to the input end of the acquisition instrument, and detonate the emulsion explosive through the detonator to conduct a decoupled blasting pressure test to obtain a voltage signal;

[0021] Calculate the voltage signal to obtain the pressure-time curve.

[0022] Furthermore, the selection of the target position of the rock includes:

[0023] Select the target rock;

[0024] On the target rock, select the position where the coefficient of rock mass firmness is greater than 8 and the rock quality grade is above 80% as the target position.

[0025] Furthermore, according to the pressure response formula calculate the voltage signal to obtain the 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] Furthermore, the polyvinylidene fluoride sensor inputs the generated voltage signal into the charge mode measurement circuit.

[0027] Furthermore, the decoupled blasting explosion load model has two wave peaks. The wave peak with a relatively short rise time is the explosion shock wave load, and the wave peak with a relatively long rise time is the gas load generated by the explosion.

[0028] The present invention also provides a device for constructing a decoupled blasting explosion load model, including:

[0029] A building module, used to respectively describe the decoupled blasting explosion load in different time stages through piecewise functions, and establish a theoretical model of the decoupled blasting explosion load;

[0030] An acquisition module, used to acquire the pressure-time curve through a decoupled blasting pressure test;

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

[0032] A calibration module, used to calibrate the parameters in the theoretical model of the decoupled blasting explosion load through mechanical parameters. The parameters in the theoretical model of the decoupled blasting explosion load include the rise time of the explosion shock wave, the peak pressure of the explosion shock wave, the starting action time of the gas generated by the explosion, the rise time of the gas generated by the explosion, and the peak pressure of the gas generated by the explosion;

[0033] A calculation module, used to input the parameters in the theoretical model of the decoupled blasting explosion load into a calculation program for calculation, and obtain the decoupled blasting explosion load time curve as the decoupled 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, the construction method of the decoupled blasting explosion load model is realized.

[0035] The present invention also provides a computer-readable storage medium storing a computer program, which realizes the construction method of the decoupled blasting explosion load model when executed by a processor.

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

[0037] The present invention respectively describes the decoupled blasting explosion load in different time stages through a piecewise function to establish a theoretical model of the decoupled blasting explosion load; collects the pressure-time curve through a decoupled blasting pressure test; performs waveform analysis on the pressure-time curve to obtain mechanical parameters; calibrates the parameters in the theoretical model of the decoupled blasting explosion load through the mechanical parameters; inputs the parameters in the theoretical model of the decoupled blasting explosion load into a calculation program for calculation to obtain the decoupled blasting explosion load time curve as the decoupled blasting explosion load model. The decoupled blasting explosion load model established by the present invention takes into account both the explosion shock wave and the explosive gas load. Compared with the prior art, it can more accurately describe the action characteristics of the decoupled blasting explosion load, and can directly control the peak value and loading rate of the explosion shock wave and the explosive 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. It has the characteristics of a 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 part. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

[0042] Figure 4 It is a schematic structural diagram of a device for constructing a decoupled blasting explosion load model;

[0043] Figure 5 It is a schematic structural diagram of a terminal device in an embodiment of the present invention.

[0044] The reference signs are:

[0045] 1 - Target rock 2 - Test borehole 3 - Polyvinylidene fluoride sensor 4 - Emulsion explosive. Detailed implementation manners

[0046] 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 those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is 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 a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes 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", "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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0049] In addition, the technical features involved in 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] The present invention provides a method for constructing an uncoupled blasting explosion load model and related equipment for existing problems.

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

[0052] Step 1, describe the uncoupled blasting explosion load in different time stages by piecewise functions respectively, and establish an uncoupled blasting explosion load theoretical model;

[0053] Step 2, collect the pressure-time curve through an uncoupled blasting pressure test experiment;

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

[0055] Step 4: Calibrate the parameters in the decoupled blasting explosion load theoretical model through the mechanical parameters. The parameters in the decoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the peak pressure of the explosion shock wave, the starting action time of the blast-generated gas, the rise time of the blast-generated gas, and the peak pressure of the blast-generated gas;

[0056] Step 5: Input the parameters in the decoupled blasting explosion load theoretical model into a calculation program for calculation to obtain the decoupled blasting explosion load time curve as the decoupled blasting explosion load model.

[0057] Most preferably, the decoupled blasting explosion load theoretical model is:

[0058]

[0059] Among them, P represents the explosion load acting on the blasted structural surface in decoupled blasting, t represents time, P1 represents the peak pressure of the explosion shock wave, t a represents the starting action time of the blast-generated gas, α represents the correlation coefficient of the rise time of the explosion shock wave, t1 represents the coefficient of the rise time of the explosion shock wave, P2 represents the peak pressure of the blast-generated gas, β represents the correlation coefficient of the rise time of the blast-generated gas, t2 represents the rise time of the blast-generated gas.

[0060] According to the above decoupled blasting explosion load theoretical model, t a represents the starting action time of the blast-generated gas, which is used to reflect the time difference between the starting action times of the explosion shock wave and the blast-generated gas before and after. When t is less than 0, at this time P is equal to 0, indicating that there is no explosion load acting; when 0 ≤ t ≤ t a , P is a load represented by a double-exponential function, indicating that only the explosion shock wave acts in this stage; when t > t a , P is a load represented by the superposition of two double-exponential functions, indicating that both the explosion shock wave and the blast-generated gas act in this stage.

[0061] Specifically, Step 2 includes:

[0062] Select the target position of the rock as the test site;

[0063] Obtain test drill holes on the test site through a down-the-hole drill;

[0064] Fix and install a polyvinylidene fluoride sensor on the lower surface of the hole wall of the test drill hole;

[0065] Place the emulsion explosive with a weight of 0.1 kg and a diameter of 32 mm at a distance of 1.0 m from the orifice 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 0.1 m;

[0066] Connect the input end of the charge mode measurement circuit to the output end of the polyvinylidene fluoride sensor, and connect the output end of the charge model measurement circuit to the input end of the acquisition instrument. Detonate the emulsion explosive through the detonator to conduct an uncoupled blasting pressure test, and obtain a voltage signal;

[0067] Calculate the voltage signal to obtain a pressure-time curve.

[0068] In the embodiment of the present invention, as Figure 2 shown, select the target rock 1, and select a position on the target rock 1 where the hardness coefficient is greater than 8 and the rock mass rating is above 80% as the target position; obtain a test borehole 2 with a depth of 4 m and a diameter of 90 mm through a down-the-hole drill. Use a polyvinylidene fluoride sensor 3 to measure the pressure on the inner wall of the test borehole 2. After the polyvinylidene fluoride sensor 3 is connected to the charge model measurement circuit, paste it on the hole wall of the test borehole 2 with glue. After the glue is firm, place the emulsion explosive 4 with a weight of 0.1 kg and a diameter of 32 mm at a distance of 1.0 m from the orifice of the test borehole 2, and connect the emulsion explosive 4 to the detonator. The distance from the test point to the center of the emulsion explosive 4 is 0.1 m; select the charge mode measurement circuit, and the parallel capacitance in the charge mode measurement circuit is 50 nf. After the equipment for measurement is debugged, detonate the emulsion explosive 4, record and save the voltage signal received by the charge mode measurement circuit through the acquisition instrument, obtain the test data and calculate the test data to obtain a pressure-time curve.

[0069] Specifically, calculate the test data according to the pressure response formula 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 the charge mode measurement circuit.

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

[0072] It can be known from the definition of the model parameters in the decoupled blasting explosion load model that by analyzing the pressure-time curve, 5 parameters need to be obtained, namely the rise time and peak value of the air shock wave, as well as the rise time of the explosion-generated gas, the starting action time of the explosion-generated gas, and the peak value.

[0073] Specifically, step 3 includes:

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

[0075] Specifically, through the above waveform analysis, 5 parameters required for the model are obtained, and substituting the parameters into the equation can perform parameter calibration.

[0076] In the embodiments of the present invention, the calculation program in step 5 is a Matlab calculation program. Input the parameters in the decoupled blasting explosion load theoretical model into the Matlab calculation program to output the change process of the decoupled blasting explosion load; in the embodiments of the present invention, it is assumed that the rise time t1 of the explosion shock wave is 200 us, the peak value P1 of the explosion shock wave is 100 MPa, the starting action time t a of the explosion-generated gas is 1 ms, the rise time t2 of the explosion-generated gas is 5 ms, and the peak value P2 of the explosion-generated gas is 300 MPa, to obtain the decoupled blasting explosion load model as shown in Figure 3 which can be directly applied to the hole wall or the equivalent excavation surface for blasting dynamic analysis in the numerical simulation of non-fluid-solid coupling rock blasting.Figure 3 It can be seen that there are two peaks in the decoupled blasting explosion load model. The peak with a relatively short rising time is the explosion shock wave load, and the peak with a relatively long rising time is the gas load generated by the explosion.

[0077] In the embodiment of the present invention, a theoretical model of decoupled blasting explosion load is established by using piecewise functions to respectively describe the decoupled blasting explosion load in different time stages; the pressure-time curve is collected through a decoupled blasting pressure test; waveform analysis is performed on the pressure-time curve to obtain mechanical parameters; each parameter in the theoretical model of decoupled blasting explosion load is calibrated through the mechanical parameters; each parameter in the theoretical model of decoupled blasting explosion load is input into a calculation program for calculation to obtain the decoupled blasting explosion load time curve as the decoupled blasting explosion load model. The decoupled blasting explosion load model established in the embodiment of the present invention takes into account both the explosion shock wave and the gas load generated by the explosion. Compared with the prior art, it can more accurately describe the action characteristics of the decoupled blasting explosion load, and can directly control the peak value and loading rate of the explosion shock wave and the gas load generated by the explosion by respectively inputting the peak value and the rising time. Therefore, it is convenient to study the dynamic response of the structure under different peak values and loading rates, and has the characteristics of a simple model, few input parameters, and wide applicability.

[0078] The embodiment of the present invention also provides a device for constructing a decoupled blasting explosion load model, as Figure 4 shown. The construction device 100 includes:

[0079] A building module 101, configured to establish a theoretical model of decoupled blasting explosion load by using piecewise functions to respectively describe the decoupled blasting explosion load in different time stages;

[0080] A collection module 102, configured to collect a pressure-time curve through a decoupled blasting pressure test;

[0081] An analysis module 103, configured to perform waveform analysis on the pressure-time curve to obtain mechanical parameters, where the mechanical parameters include the rising time and pressure peak value of the explosion shock wave and the gas load generated by the explosion;

[0082] A calibration module 104, configured to calibrate each parameter in the theoretical model of decoupled blasting explosion load through the mechanical parameters, and each parameter in the theoretical model of decoupled blasting explosion load includes the rising time of the explosion shock wave, the pressure peak value of the explosion shock wave, the starting action time of the gas load generated by the explosion, the rising time of the gas load generated by the explosion, and the pressure peak value of the gas load generated by the explosion;

[0083] A calculation module 105, configured to input each parameter in the theoretical model of decoupled blasting explosion load into a calculation program for calculation to obtain the decoupled blasting explosion load time curve as the decoupled blasting explosion load model.

[0084] It should be noted that for the content such as information interaction and execution process between the above-mentioned devices / units, since it is based on the same concept as the method embodiments of this application, for its specific functions and the technical effects brought, reference can be specifically made to the method embodiment part, and details will not be repeated here.

[0085] Those skilled in the art can clearly understand that for the convenience and simplicity of description, only the above-mentioned division of each functional unit and module is used as an example. In actual applications, the above functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of each functional unit and module are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be repeated here.

[0086] The embodiment of the present invention also provides a terminal device, such as Figure 5 shown. The terminal device D10 in 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. When the processor D100 executes the computer program D102, the steps of the method for constructing the uncoupled blasting explosion load model are implemented. Alternatively, when the processor D100 executes the computer program D102, the functions of each module / unit in the above device embodiments are implemented.

[0087] The terminal device D10 can be a computing device such as a desktop computer, a notebook, a palm computer, a server, a server cluster, and a cloud server. The terminal device may include, but is not limited to, a processor D100 and a memory D101. Those skilled in the art can understand that Figure 5 merely examples of the terminal device D10 are given, which do not constitute a limitation on the terminal device D10. It may include more or fewer components than shown in the figure, or combine certain components, or different components. For example, it may also include input / output devices, network access devices, etc.

[0088] The so-called processor D100 may be a central processing unit (CPU), and the processor may also be other general-purpose processors, digital signal processors (DSPs), application specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0089] In some embodiments, the memory D101 may be an internal storage unit of the terminal device D10, such as the 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 media card (SMC), a secure digital (SD) card, a flash card, etc., equipped on the terminal device D10. Further, the memory D101 may also include both the internal storage unit and the external storage device of the terminal device D10. The memory D101 is used to store an operating system, application programs, 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 content such as information interaction and execution process between the above-mentioned devices / units, due to being based on the same concept as the method embodiments of the present application, for its specific functions and the technical effects brought, reference may be specifically made to the method embodiment part, and details will not be elaborated here.

[0091] Those skilled in the art can clearly understand that, for the convenience and conciseness of description, only the division of the above-mentioned functional units and modules is used as an example. In actual applications, the above-mentioned functions can be allocated to different functional units and modules according to needs, that is, the internal structure of the device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated into a processing unit, or each unit can exist physically alone, or two or more units can be integrated into one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of a software functional unit. In addition, the specific names of the functional units and modules are only for the convenience of mutual distinction and do not limit the protection scope of this application. The specific working processes of the units and modules in the above system can refer to the corresponding processes in the foregoing method embodiments and will not be elaborated herein.

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

[0093] If the above-mentioned 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, to implement all or part of the processes in the above-mentioned method embodiments of the present application, a computer program can be used to instruct relevant hardware to complete. The computer program can be stored in a computer-readable storage medium. When the computer program is executed by a processor, the steps of the above-mentioned method embodiments can be implemented. Among them, the computer program includes computer program code, and the computer program code can be in the form of source code, object code, executable file or some intermediate form, etc. The computer-readable medium can 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), random access memory (RAM), electrical carrier signal, telecommunication signal, and software distribution medium. For example, a USB flash drive, a mobile hard disk, a magnetic disk or an optical disc, etc. In some jurisdictions, according to legislation and patent practice, the computer-readable medium cannot be an electrical carrier signal and a telecommunication signal.

[0094] The above is the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A construction method for an uncoupled blasting explosion load model, characterized in that Including: Step 1: Describe the decoupled blasting explosion load in different time stages through a piecewise function, and establish a theoretical model of the decoupled blasting explosion load; Step 2: Collect the pressure-time curve through the decoupled blasting pressure test; Step 3: Analyze the waveform of the pressure-time curve to obtain mechanical parameters, where the mechanical parameters include the rise time and peak pressure of the explosion shock wave and the explosion-generated gas; Step 4: Calibrate the parameters in the theoretical model of the decoupled blasting explosion load through the mechanical parameters. The parameters in the theoretical model of the decoupled blasting explosion load include the rise time of the explosion shock wave, the peak pressure of the explosion shock wave, the starting action time of the explosion-generated gas, the rise time of the explosion-generated gas, and the peak pressure of the explosion-generated gas; Step 5: Input the parameters in the theoretical model of the decoupled blasting explosion load into a calculation program for calculation to obtain the decoupled blasting explosion load time curve as the decoupled blasting explosion load model.

2. The method for constructing an uncoupled blasting explosion load model according to claim 1, wherein, The theoretical model of the decoupled blasting explosion load is: Among them, P represents the explosion load acting on the blasted structural surface in decoupled blasting, t represents time, P1 represents the peak pressure of the explosion shock wave, t a represents the starting action time of the explosion-generated 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-generated gas, β represents the correlation coefficient of the explosion-generated gas rise time, t2 represents the rise time of the explosion-generated gas.

3. The construction method of the decoupled blasting explosion load model according to claim 2, characterized in that, Step 2 includes: Select the target position of the rock as the test site; Obtain a test borehole on the test site through a down-the-hole drill; Fix and install a polyvinylidene fluoride sensor on the lower surface of the hole wall of the test borehole; Place an emulsion explosive with a weight of 0.1 kg and a diameter of 32 mm at a distance of 1.0 m from the hole mouth of the test borehole, connect the emulsion explosive to the detonator, and the distance from the test point to the center of the emulsion explosive is 0.1 m; Connect the input end of the charge mode measurement circuit to the output end of the polyvinylidene fluoride sensor, connect the output end of the charge model measurement circuit to the input end of the acquisition instrument, and detonate the emulsion explosive through the detonator to conduct a decoupled blasting pressure test to obtain a voltage signal; Calculate the voltage signal to obtain the pressure-time curve.

4. The method for constructing an uncoupled blasting explosion load model according to claim 3, wherein Selecting the target position of the rock includes: Select the target rock; Select a position on the target rock with a hardness coefficient greater than 8 and a rock mass grade above 80% as the target position.

5. The method for constructing the decoupled blasting explosion load model according to claim 4, wherein According to the pressure response formula calculate the voltage signal 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.

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

7. The method for constructing the decoupled blasting explosion load model according to claim 6, wherein There are two wave peaks in the decoupled blasting explosion load model. The wave peak with a relatively short rise time is the explosion shock wave load, and the wave peak with a relatively long rise time is the explosion-generated gas load.

8. A device for constructing an uncoupled blasting explosion load model, characterized in that, Including: A building module, used to describe the decoupled blasting explosion load in different time stages through a piecewise function and establish a theoretical model of the decoupled blasting explosion load; An acquisition module, used to collect the pressure-time curve through the decoupled blasting pressure test; An analysis module, used to analyze the waveform of the pressure-time curve to obtain mechanical parameters, where the mechanical parameters include the rise time and peak pressure of the explosion shock wave and the explosion-generated gas; A calibration module, configured to calibrate various parameters in the decoupled blasting explosion load theoretical model according to the mechanical parameters, where the various parameters in the decoupled blasting explosion load theoretical model include the rise time of the explosion shock wave, the peak pressure of the explosion shock wave, the starting action time of the explosion-generated gas, the rise time of the explosion-generated gas, and the peak pressure of the explosion-generated gas; A calculation module, configured to input the various parameters in the decoupled blasting explosion load theoretical model into a calculation program for calculation, and obtain a decoupled blasting explosion load time curve as the decoupled 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, it implements the method for constructing the decoupled blasting explosion load model according to any one of claims 1 to 7.

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

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