Device and method for detecting detonation reliability of digital electronic detonator under simulated multi-source stimulation

Abstract

The invention discloses a digital electronic detonator detonation reliability detection device and method under simulation of multi-source stimulation, and relates to the technical field of digital electronic detonator detonation performance detection in engineering blasting. According to the method, the digital electronic detonator is interfered by simulating the real environment of an engineering blasting site, and the detonation reliability of the digital electronic detonator is tested and analyzed, and the specific content is as follows: St1, researching the detonation reliability of the digital electronic detonator under the action of dynamic pressure with different intensities; st2, the detonation reliability of the digital electronic detonator under different deepwater static pressure effects is researched; st3, the detonation reliability of the digital electronic detonator at different temperatures is researched; st4, researching the detonation reliability of the digital electronic detonator under different electromagnetic intensities; st5, the detonation reliability of detonation of the digital electronic detonator under different electrostatic field intensities is studied; and St6, researching the detonation reliability of the digital electronic detonator under multi-factor composite loading.

Description

Technical Field

[0001] The invention relates to the technical field of digital electronic detonator initiation performance detection in engineering blasting, and in particular to a device and method for detecting the initiation reliability of digital electronic detonators under simulated multi-source stimulation. Background Art

[0002] Industrial digital electronic detonators use chip modules to replace the delay medicine and ignition device in traditional detonators. The delay accuracy can be controlled within 1% (or 1ms), and the delay time can be set on site, which improves the delay accuracy of the detonator and the flexibility of the micro-difference design of the detonation network, which is conducive to the improvement of industry safety and digital supervision. In recent years, under the strong promotion of the competent departments of the industry, digital electronic detonators will become the development focus of the initiating equipment industry. As one of the important indicators of the dynamic quality characteristics of digital electronic detonator products, initiation reliability has been integrated into all aspects of product development, design, production, testing, and use. The development and establishment of scientific and reasonable reliability analysis theories and methods are of great significance for guiding product reliability design and improving product quality.

[0003] At present, digital electronic detonator technology has entered a rapid development stage, but the product quality of domestic enterprises is uneven, and the reliability of product detonation has become the biggest obstacle to the promotion and application of digital electronic detonators. For example, the refusal rate of digital electronic detonators in open-pit blasting can generally be controlled within 0.3‰, while the refusal rate in complex environments such as tunnels, pile holes, and large-diameter deep-hole metal mine mixed blasting exceeds 0.1%; the refusal rate of some companies' products in tunnel blasting exceeds 0.3%, and the refusal rate in pile well blasting even exceeds 0.5%, which seriously affects the safety of construction operations and the progress of the project. The underground environment of coal mines is harsh. Under the electromagnetic effect and explosion shock wave generated by the detonation of industrial explosives, the control circuit of digital electronic detonators is prone to failure, resulting in a refusal rate of up to 0.3%-1%. The research in this area is very difficult and there are few research results, but it is indeed the unavoidable reason for the refusal of digital detonators in small-hole blasting, and it is also a problem that must be solved to prevent digital detonators from refusal.

[0004] The existing patent document (publication number: CN114492080A) discloses a method for evaluating and optimizing the impact resistance of digital electronic detonators. By constructing a stress-strength interference model, the safety margin of the digital electronic detonator and the failure probability of the digital electronic detonator in the on-site blasting environment are calculated through this interference model, and then a comprehensive judgment is made by comparing with the predetermined safety margin index and safety index. However, it lacks other interference factors that may occur at the blasting site and has limitations.

[0005] In summary, facing the lack of existing digital electronic detonator reliability detection devices, how to solve it has become a difficult problem. Summary of the invention

[0006] In order to solve the above technical problems, the present invention provides a device and method for detecting the initiation reliability of digital electronic detonators under simulated multi-source stimulation, which interferes with the digital electronic detonators by simulating external stimulation at an engineering blasting site, and tests and analyzes the initiation performance of the digital electronic detonators, so as to evaluate the reliability of the digital electronic detonators.

[0007] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0008] The present invention provides a device for detecting the reliability of digital electronic detonator detonation under simulated multi-source stimulation. In the present invention, an initiator is connected in series with a fixed resistor and a digital electronic detonator. The fixed resistor can be 10W50Ω, 10W100Ω, etc., to control the action of the digital electronic detonator.

[0009] The detection device includes a square test box, a lifting platform arranged in the square test box, a digital electronic detonator installed on the upper side of the lifting platform, and a shock tube connected to the square test box. The size of the square test box is 650*50*50cm. The upper end of the lifting platform is an iron plate and the lower end is a rubber plate. The lifting platform can be adjusted from 10 to 40cm. The shock tube is equipped with a tube pressure gauge 12. The outside of the square test box is equipped with a small light bulb electrically connected to the digital electronic detonator sensor. The rated voltage of the small light bulb is 20V, 22.5V, 25V, etc., which is equal to the normal output voltage of the capacitor of the digital electronic detonator control module.

[0010] The detection device is also equipped with a dynamic pressure loading system, a deep-water static pressure loading system, a high-temperature loading system, an electromagnetic field loading system, an electrostatic field loading system and a shock wave pressure sensor. The digital electronic detonator adopts the electronic control module and the detonator shell combination structure of the digital electronic detonator. The dynamic pressure loading system also includes a combustible gas cylinder connected to the shock tube through a pipeline, an ignition electrode for igniting the shock tube gas, and an ignition power supply electrically connected to the ignition electrode. The deep-water static pressure loading system includes a water source supply device for injecting water into the square test box, a high-pressure air pump for injecting high-pressure gas into the square test box, and a digital pressure gauge for monitoring the internal pressure information of the square test box. The high-pressure air pump is connected to the upper inlet of the square test box. When conducting the test, water is injected into the square test box through the upper inlet, and then the high-pressure air pump is used to inject high-pressure gas into the square test box. A water outlet is also set at the bottom of the square test box. The high-temperature loading system includes a DC regulated power supply, a nickel-chromium heating wire for providing heat to the test environment, and a contact thermocouple for detecting the heat of the test environment. The electromagnetic field loading system includes an AlSi magnetic ring, a copper coil, a DC high voltage generator for supplying power to the copper coil to generate a magnetic field, and a Gaussmeter for detecting the magnitude of the magnetic field in the test environment.

[0011] As a preferred technical solution of the detection device in the present invention: the square test box is equipped with a sensor interface, the sensor interface is electrically connected to the digital electronic detonator internally, and the sensor interface is electrically connected to the small light bulb externally.

[0012] As a preferred technical solution of the detection device in the present invention: in the dynamic pressure loading system, the high-pressure pipeline of the shock tube is 80 cm long, the low-pressure pipeline is 150 cm long, and the pipeline radius is 10 cm. It also includes a bursting membrane, a lifting platform, and various combustible gases. The bursting membrane includes a stainless steel bursting membrane, a graphite bursting membrane, and a PVC bursting membrane. The thickness of the bursting membrane is 0.3 to 0.7 mm. The dynamic pressure loading system generates dynamic pressure by igniting a mixture of combustible gas and air in the shock tube to break the membrane, wherein the combustible gas is composed of one or more of hydrogen, methane and acetylene.

[0013] As a preferred technical solution of the detection device in the present invention: the high temperature loading system includes a terminal installed on a square test box, the terminal is electrically connected to the nickel-chromium heating wire, and the thermal sensing part of the contact thermocouple is inserted into the square test box.

[0014] The present invention also provides a method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation, comprising the following method steps:

[0015] Test 1: Dynamic pressure loading test on digital electronic detonators in simulated delayed blasting environment: Fix the digital electronic detonator on the upper end of the lifting platform, adjust the height of the lifting platform so that the digital electronic detonator is in the center of the square test box, and trigger the control module of the digital electronic detonator. Change the dynamic pressure intensity by adjusting the flammable gas composition, type, initial pressure and length of the shock tube, and act on the digital electronic detonator in the square test box. Observe the brightness change of the small bulb and analyze the corresponding detonation reliability of the digital electronic detonator.

[0016] Test 2: Static pressure loading test of digital electronic detonators in simulated deepwater blasting environment: Fill the square test box with water and add high-pressure gas to simulate water pressure at different depths, analyze the water resistance and pressure resistance of digital electronic detonators, or test digital electronic detonators at the same depth of water pressure and different action time to trigger the control module of digital electronic detonators. Observe the brightness change of the small light bulb and analyze the corresponding detonation reliability of digital electronic detonators.

[0017] Test 3: High-temperature loading test of digital electronic detonators in a simulated high-temperature blasting environment: The digital electronic detonators are heated by winding nickel-chromium heating wires around the outside of the digital electronic detonators, and the surface temperature of the digital electronic detonators is detected by contact temperature sensors to trigger the control module of the digital electronic detonators. The brightness changes of the small bulbs of the digital electronic detonators under different temperature loadings are observed to analyze the corresponding detonation reliability of the digital electronic detonators.

[0018] Test 4: Simulate the electromagnetic loading test of digital electronic detonators in the on-site blasting environment: By wrapping a copper coil around the silicon-aluminum magnetic ring and connecting the two ends of the copper coil to a DC high-voltage generator, a magnetic field is formed inside the copper coil, and the magnetic field inside the coil is measured by a Gauss meter. The digital electronic detonator is placed inside the coil, and the magnetic field strength is changed by changing the output voltage of the DC high-voltage generator to trigger the control module of the digital electronic detonator. Observe the brightness changes of the small light bulb of the digital electronic detonator under different magnetic field strengths, and analyze the corresponding detonation reliability of the digital electronic detonator.

[0019] Test 5: Electrostatic loading test of digital electronic detonators in simulated on-site blasting environment: Connect the positive pole of the DC high-voltage generator to the upper end of the lifting platform, set the output voltage of the DC high-voltage generator, measure the distance from the upper end of the lifting platform to the top surface of the square test box, change the electric field strength by changing the output voltage of the DC high-voltage generator, and trigger the control module of the digital electronic detonator. Observe the brightness changes of the small bulb of the digital electronic detonator under different electrostatic loading, and analyze the corresponding initiation reliability of the digital electronic detonator.

[0020] Test 6: Dynamic pressure and electromagnetic composite loading test on digital electronic detonators simulating on-site blasting environment: Integrating the test configurations of Test 1 and Test 4, triggering the control module of the digital electronic detonator, observing the brightness changes of the small bulb of the digital electronic detonator under the composite loading of dynamic pressure and electromagnetic field, to analyze the corresponding detonation reliability of the digital electronic detonator.

[0021] Test seven: Static pressure and electromagnetic composite loading test on digital electronic detonators simulating on-site blasting environment: Integrate the test configuration of Tests 2 and 4, trigger the control module of the digital electronic detonator, observe the brightness change of the small bulb of the digital electronic detonator under the composite loading of static pressure and electromagnetic field, and analyze the corresponding detonation reliability of the digital electronic detonator.

[0022] Test 8: Dynamic pressure and high temperature composite loading test on digital electronic detonators simulating on-site blasting environment: Integrating the test configurations of Tests 1 and 3, triggering the control module of the digital electronic detonator, and analyzing the corresponding detonation reliability of the digital electronic detonator by observing the brightness changes of the small bulb of the digital electronic detonator under the composite loading of dynamic pressure and high temperature.

[0023] Test 9. High temperature and electromagnetic composite loading test on digital electronic detonators simulating on-site blasting environment: Integrate the test configuration of Test 3 and Test 4, trigger the control module of the digital electronic detonator, observe the brightness change of the small bulb of the digital electronic detonator under the condition of high temperature and electromagnetic composite loading, and analyze the corresponding detonation reliability of the digital electronic detonator.

[0024] Test 10. Dynamic pressure, high temperature and electromagnetic composite loading test on digital electronic detonators simulating on-site blasting environment: Integrate the test configuration of Tests 1, 3 and 4, trigger the control module of the digital electronic detonator, and analyze the corresponding detonation reliability of the digital electronic detonator by observing the brightness change of the small bulb of the digital electronic detonator under the composite loading of dynamic pressure, high temperature and electromagnetic.

[0025] In addition, in the above-mentioned test 1 to test 10, there are two change states in the process of analyzing the detonation reliability by observing the brightness change of the small bulb: Small bulb brightness change state 1: If the brightness of the small bulb dims or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator is weakened or refuses to explode. Small bulb brightness change state 2: If the brightness of the small bulb does not change or can return to its original normal brightness after dimming, it means that the digital electronic detonator can be safely detonated.

[0026] As a preferred technical solution of the detection method in the present invention, in Test 6, the configuration of the dynamic pressure and electromagnetic composite loading test of the digital electronic detonator simulating the on-site blasting environment is as follows: the digital electronic detonator is fixed to the upper end of the lifting platform, and the height of the lifting platform is adjusted so that the digital electronic detonator is in the center of the square test box. The dynamic pressure intensity is changed by adjusting the flammable gas composition, type, initial pressure and length of the shock tube, and acts on the digital electronic detonator in the square test box, and then the electromagnetic coil is put on the outside of the digital electronic detonator, and the output voltage of the DC high-voltage generator is adjusted to adjust the magnetic field intensity.

[0027] As a preferred technical solution for the detection method in the present invention, in Test 7, the static pressure and electromagnetic composite loading test of the digital electronic detonator simulating the on-site blasting environment is configured as follows: the coil is put on the outside of the digital electronic detonator, and water is filled into the square test box at the same time, the output voltage of the DC high-voltage generator is adjusted to control the magnetic field strength, and high-pressure gas is injected into the square test box to simulate the corresponding depth of water pressure.

[0028] As a preferred technical solution for the detection method in the present invention, in Test 8, the configuration of the dynamic pressure and high-temperature composite loading test of the digital electronic detonator simulating the on-site blasting environment is as follows: the digital electronic detonator is heated by winding a nickel-chromium heating wire around the outside of the digital electronic detonator, and the dynamic pressure intensity is changed by adjusting the composition, type, initial pressure and length of the shock tube combustible gas, and acting on the digital electronic detonator in the square test box.

[0029] As a preferred technical solution of the detection method in the present invention, in Test Nine, the configuration of the high temperature and electromagnetic composite loading test of the digital electronic detonator simulating the on-site blasting environment is as follows: the digital electronic detonator is heated by winding a nickel-chromium heating wire around the outside of the digital electronic detonator, and at the same time, a copper coil is wrapped around the outside of the digital electronic detonator to adjust the output voltage of the DC high-voltage generator.

[0030] As a preferred technical solution of the detection method in the present invention, in Test 10, the configuration of the dynamic pressure, high temperature and electromagnetic composite loading test of the digital electronic detonator to simulate the on-site blasting environment is as follows: fix the digital electronic detonator to the upper end of the lifting platform, and adjust the height of the lifting platform so that the digital electronic detonator is in the center of the square test box. The dynamic pressure intensity is changed by adjusting the flammable gas composition, type, initial pressure and length of the shock tube, and acts on the digital electronic detonator in the square test box. Then, the nickel-chromium heating wire is wrapped around the outside of the digital electronic detonator to heat the digital electronic detonator, and at the same time, the copper coil is wrapped around the outside of the digital electronic detonator to adjust the output voltage of the DC high-voltage generator.

[0031] Compared with the prior art, the present invention has the following beneficial effects:

[0032] 1. The present invention can further optimize product design by testing and evaluating the anti-interference performance of digital electronic detonators, and find out the design problems of digital electronic detonators by testing the initiation performance of digital electronic detonators under various interference factors. Then, by studying and comparing factors such as different materials, structures, and processes, the optimal design scheme can be found to improve the anti-interference ability of digital electronic detonators and enhance their initiation reliability.

[0033] 2. The present invention can improve the safety of digital electronic detonators and reduce the occurrence of blind shots. As a main detonating material for blasting engineering, the safety of digital electronic detonators is of vital importance. The present invention can detect the detonation reliability of digital electronic detonators under various external stimuli, thereby better avoiding the phenomenon of digital electronic detonators failing to explode in actual use.

[0034] 3. The present invention is simple to operate, safe and reliable, and has low cost. It can simulate most of the interference that may exist on digital electronic detonators in engineering blasting operations, and can complete the test of the initiation reliability of digital electronic detonators under multi-source stimulation in the laboratory. It is suitable for large-scale promotion and application in digital electronic detonator manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the overall structure of the device of the present invention.

[0036] Figure 2 Schematic diagram of the dynamic pressure generating system in the device of the present invention.

[0037] Figure 3 It is a schematic diagram of the deep water static pressure generating system in the device of the present invention.

[0038] Figure 4 Schematic diagram of the high temperature generation system in the device of the present invention.

[0039] Figure 5 Schematic diagram of the electromagnetic field generating system in the device of the present invention.

[0040] Figure 6 Schematic diagram of the electrostatic generating system in the device of the present invention.

[0041] Figure 7 The circuit diagram of the small light bulb detection system in the device of the present invention.

[0042] Among them: 1-sensor interface, 2-digital pressure gauge, 3-contact thermocouple, 4-terminal, 5-upper inlet, 6-square test box, 7-lifting platform, 8-water outlet, 9-small light bulb, 10-digital electronic detonator, 11-shock tube, 12-tube pressure gauge, 13-air inlet, 14-ignition electrode, 15-combustible gas cylinder, 16-ignition power supply, 17-oscilloscope, 18-water, 19-high-pressure air pump, 20-DC regulated power supply, 21-nickel-chromium heating wire, 22-DC high-voltage generator, 23-copper coil, 24-FeSiAl magnetic ring, 25-initiator, 26-fixed value resistor. DETAILED DESCRIPTION

[0043] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0044] The present invention designs a device and method for detecting the detonation reliability of digital electronic detonators under multiple interference factors at engineering blasting sites, which is applicable to engineering blasting sites such as coal mining, tunnel excavation, and underground blasting. By detecting the detonation reliability of digital electronic detonators under multi-source stimulation, a real and reliable experimental basis can be provided for the failure cause analysis, structural design, and selection of digital electronic detonators, thereby greatly reducing the possibility of electromagnetic detonator refusal to explode in blasting engineering.

[0045] Example 1, please refer to Figure 1 , Figure 2 , follow the steps below to simulate the dynamic pressure loading of the digital electronic detonator in the delayed blasting environment:

[0046] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0047] St2: Filling the shock tube 11 with H2-air mixed gas in different proportions to change the dynamic pressure intensity.

[0048] St3: The mixed gas in the pipeline is ignited by the ignition power supply 16, and the shock wave breaks through the 0.5mm PVC film and acts on the digital electronic detonator 10 located in the center of the square device.

[0049] St4: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0050] In order to study the impact resistance of the digital electronic detonator 10, the shock tube 11 was filled with H2-air mixed gas in different proportions to conduct impact tests, and each group of experiments was tested with 1000 rounds.

[0051] The test results are as follows:

[0052] Table 1 Explosion rejection rate of dynamic pressure impact test

[0053] Pressure / MPa 0.1 0.2 0.3 0.4 0.5 0.6 0.7 0.8 0.9 1 Explosion rejection rate / % 0 0 0.1 0.1 0.1 0.2 0.3 0.4 0.5 0.6

[0054] Example 2, reference Figure 1 , Figure 3 The following steps are followed to simulate the deep-water static pressure loading of the digital electronic detonator (10) in the deep-water blasting environment:

[0055] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0056] St2: Fill the square test box 6 with water and add high-pressure gas to simulate water pressure at different depths (water depth 400mm, exceeding the height of the detonator). The static pressure is recorded by the pressure sensor, and the digital electronic detonator 10 is tested at the same water pressure depth and different action times.

[0057] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0058] Simulation test: In order to study the anti-static pressure performance of the digital electronic detonator 10, water is filled in the square test box 6 and high-pressure gas is added to carry out the anti-static pressure test, and each group of experiments is tested with 1,000 rounds.

[0059] The test results are as follows:

[0060] Table 2 Explosion rejection rate in deep water static pressure test

[0061]

[0062] Example 3, reference Figure 1 , Figure 4 , follow the steps below to simulate the high temperature blasting environment to load the digital electronic detonator 10 at high temperature:

[0063] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0064] St2: Wrap a nickel-chromium heating wire 21 around the outside of the digital electronic detonator 10 to heat the digital electronic detonator 10 , and bring the temperature sensing end of the contact temperature sensor into contact with the digital electronic detonator 10 .

[0065] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0066] Simulation test: In order to study the detonation reliability of the digital electronic detonator 10 at different temperatures, a high temperature resistance test was conducted on the digital electronic detonator 10 using a nickel-chromium heating wire 21 in a square device, and each group of experiments was tested with 1,000 rounds.

[0067] The test results are as follows:

[0068] Table 3 High temperature test explosion rejection rate

[0069]

[0070] Example 4, reference Figure 1 , Figure 5 , follow the steps below to simulate the on-site blasting environment to test the electromagnetic loading of the digital electronic detonator 10:

[0071] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0072] St2: A copper coil 23 is wound around the silicon-aluminum magnetic ring, and both ends of the copper coil 23 are connected to a DC high-voltage generator 22. A magnetic field is formed inside the coil, and the magnitude of the magnetic field inside the coil is measured by a Gauss meter.

[0073] St3: Place the digital electronic detonator 10 inside the coil, and change the magnetic field strength by changing the output voltage of the DC high voltage generator 22.

[0074] St4: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0075] Simulation test: In order to study the detonation reliability of the digital electronic detonator 10 under different magnetic field strengths, an anti-electromagnetic test was conducted on the digital electronic detonator 10, and each group of experiments was tested with 1,000 rounds.

[0076] The test results are as follows:

[0077] Table 4 Explosion rejection rate in electromagnetic radiation experiment

[0078] Voltage / kV 5 10 12 13 14 15 16 17 18 19 21 25 Explosion rejection rate / % 0 0 0 0 0 0.1 0.1 0.3 0.2 0.3 0.4 0.5

[0079] Example 5, reference Figure 1 , Figure 6 , follow the steps below to simulate the static loading of the digital electronic detonator 10 in the on-site blasting environment:

[0080] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0081] St2: Connect the positive pole of the DC high-voltage generator 22 to the upper end of the lifting platform 7, which is an iron plate at the upper end and a rubber plate at the lower end. Set the output voltage of the DC high-voltage generator 22, measure the distance from the upper end of the lifting platform 7 to the top surface of the square device, and change the electric field strength by changing the output voltage of the DC high-voltage generator 22.

[0082] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0083] Simulation test: In order to study the detonation reliability of the digital electronic detonator 10 under different electric field strengths, an antistatic test was conducted on the digital electronic detonator 10, and 1,000 rounds were tested in each group of experiments.

[0084] The test results are as follows:

[0085] Table 5 Electrostatic test explosion rejection rate

[0086] Voltage / kV 0 1 2 3 4 5 6 7 8 9 10 Explosion rejection rate / % 0 0 0 0 0 0.1 0.1 0.3 0.3 0.3 0.4

[0087] Example 6, reference Figure 1 , Figure 2 and Figure 3 , follow the steps below to simulate the dynamic pressure and electromagnetic composite loading of the digital electronic detonator 10 in the on-site blasting environment:

[0088] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0089] St2: Filling the shock tube 11 with H2-air mixed gas in different proportions to change the dynamic pressure intensity.

[0090] St3: The mixed gas in the pipeline is ignited by the ignition power supply 16, and the shock wave breaks through the 0.5mm PVC blasting membrane and acts on the digital electronic detonator 10 in the square device.

[0091] St4: Then, the electromagnetic coil is sheathed on the outside of the digital electronic detonator 10, and the output voltage of the DC high voltage generator 22 is adjusted. The magnetic field strength is changed by changing the output voltage of the DC high voltage generator 22.

[0092] St5: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0093] Simulation test: In order to study the detonation reliability of the digital electronic detonator 10 under the combined loading of dynamic pressure and electromagnetic field, the digital electronic detonator 10 was subjected to impact resistance and electromagnetic tests, and each group of experiments was tested with 1,000 rounds.

[0094] The test results are as follows:

[0095] Table 6 Explosion rejection rate in dynamic pressure impact and electromagnetic composite loading experiments

[0096]

[0097]

[0098] Embodiment 7, reference Figure 1 , Figure 3 and Figure 5 , follow the steps below to simulate the static pressure and electromagnetic composite loading of the digital electronic detonator 10 in the on-site blasting environment:

[0099] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0100] St2: The coil is placed on the outside of the digital electronic detonator 10, and water is filled into the square test box 6. The magnetic field is adjusted by adjusting the output voltage of the DC high-voltage generator 22, and high-pressure gas is added to simulate water pressure at different depths.

[0101] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0102] Simulation test: In order to study the detonation reliability of digital electronic detonator 10 under the combined loading of static pressure and electromagnetic field, the digital electronic detonator 10 was subjected to static pressure and electromagnetic tests. Each group of experiments was tested with 1,000 rounds. In order to control the influence of static pressure action time, the action time of each round was 48 hours. The test results are as follows:

[0103] Table 7 Explosion rejection rate in static pressure and electromagnetic composite loading experiments

[0104]

[0105] Example 8, reference Figure 1 , Figure 2 and Figure 4 , follow the steps below to simulate the dynamic pressure and high temperature composite loading of the digital electronic detonator 10 in the on-site blasting environment:

[0106] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0107] St2: Wrap a nickel-chromium heating wire 21 around the outside of the digital electronic detonator 10 to heat the digital electronic detonator 10, and fill the shock tube 11 with H2-air mixed gas in different proportions to change the dynamic pressure intensity and act on the digital electronic detonator 10 located in the center of the square test box 6.

[0108] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0109] Simulation test: In order to study the detonation reliability of the digital electronic detonator 10 under the combined loading of dynamic pressure and high temperature, the digital electronic detonator 10 was subjected to shock wave resistance and high temperature resistance tests. Each group of experiments was tested with 1,000 rounds. In order to control the influence of high temperature action time, the action time of each round was 8 seconds. The test results are as follows:

[0110] Table 8 Explosion rejection rate in dynamic pressure impact and high temperature composite loading test

[0111]

[0112] Example 9, reference Figure 1 , Figure 3 and Figure 4 , follow the steps below to simulate the high temperature and electromagnetic composite loading of the digital electronic detonator 10 in the on-site blasting environment:

[0113] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0114] St2: Wrap the nickel-chromium heating wire 21 around the outside of the digital electronic detonator 10 to heat the digital electronic detonator 10, and at the same time, cover the electromagnetic coil on the outside of the digital electronic detonator 10 to adjust the output voltage of the DC high-voltage generator 22.

[0115] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0116] Simulation test: In order to study the detonation reliability of digital electronic detonator 10 under the combined loading of high temperature and electromagnetic, the digital electronic detonator 10 was subjected to high temperature resistance and electromagnetic resistance tests. Each group of experiments was tested with 1,000 rounds. In order to control the influence of high temperature action time, the action time of each round was 8 seconds. The test results are as follows:

[0117] Table 9 Explosion rejection rate in dynamic pressure impact and high temperature composite loading test

[0118]

[0119] Example 10, reference Figure 2 , Figure 3 and Figure 4 , follow the steps below to simulate the dynamic pressure, high temperature and electromagnetic composite loading of the digital electronic detonator 10 in the on-site blasting environment:

[0120] St1: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, adjust the height of the lifting platform 7 so that the digital electronic detonator 10 is at the center of the square test box 6, and connect the busbar of the digital electronic detonator 10 to the terminal 4, the terminal 4 is connected to the detonator 25, and the control module of the digital electronic detonator 10 is triggered by the detonator 25.

[0121] St2: Fix the digital electronic detonator 10 on the upper end of the lifting platform 7, fill the shock tube 11 with H2-air mixed gas in different proportions to change the dynamic pressure intensity, and act on the digital electronic detonator 10 in the square test box 6, then wrap the nickel-chromium heating wire 21 around the outside of the digital electronic detonator 10 to heat the digital electronic detonator 10, and at the same time, put the electromagnetic coil on the outside of the digital electronic detonator 10 to adjust the output voltage of the DC high-voltage generator 22.

[0122] St3: Observe the brightness changes of the small bulb 9. If the brightness of the small bulb 9 becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator 10 is weakened or refuses to explode; if the brightness of the small bulb 9 does not change or can return to its original normal brightness after becoming dim, it means that the digital electronic detonator 10 can be safely detonated.

[0123] Simulation test: In order to study the detonation reliability of the digital electronic detonator 10 under the combined loading of dynamic pressure, high temperature and electromagnetic, the digital electronic detonator 10 was subjected to impact resistance, high temperature resistance and electromagnetic resistance tests. Each group of experiments was tested for 1,000 rounds. In order to control the influence of high temperature action time, the test action time for each round was 8 seconds.

[0124] The test results are as follows:

[0125] Table 10-500℃ dynamic pressure impact and electromagnetic composite loading test explosion rejection rate

[0126]

[0127]

[0128] Table 11-600℃ dynamic pressure impact and electromagnetic composite loading test explosion rejection rate

[0129]

[0130] Table 12-800℃ dynamic pressure impact and electromagnetic composite loading test explosion rejection rate

[0131]

[0132]

[0133] Table 13-1000℃ dynamic pressure impact and electromagnetic composite loading test explosion rejection rate

[0134]

[0135] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A detection device for the reliability of digital electronic detonators under simulated multi-source stimulation, characterized in that: The detection device comprises a square test box (6), a lifting platform (7) arranged in the square test box (6), a digital electronic detonator (10) installed on the upper side of the lifting platform (7), and a shock tube (11) connected to the square test box (6); a small light bulb (9) which is electrically connected to the digital electronic detonator (10) is arranged outside the square test box (6); The detection device is also equipped with a dynamic pressure loading system, a deep-water static pressure loading system, a high-temperature loading system, an electromagnetic field loading system, an electrostatic field loading system and a shock wave pressure sensor; Wherein, the digital electronic detonator (10) adopts an electronic control module and a detonator shell combined structure of the digital electronic detonator (10); The dynamic pressure loading system further comprises a combustible gas cylinder (15) connected to the shock tube (11) via a pipeline, an ignition electrode (14) for igniting the gas in the shock tube (11), and an ignition power supply (16) electrically connected to the ignition electrode (14); The deep-water static pressure loading system comprises a water supply device for injecting water into the square test box (6), a high-pressure air pump (19) for injecting high-pressure gas into the square test box (6), and a digital pressure gauge (2) for monitoring the internal pressure information of the square test box (6); The high temperature loading system comprises a DC regulated power supply (20), a nickel-chromium heating wire (21) for providing heat to the test environment, and a contact thermocouple (3) for detecting heat to the test environment; The electromagnetic field loading system comprises an AlSiFe magnetic ring (24), a copper coil (23), a DC high voltage generator (22) for supplying power to the copper coil (23) to generate a magnetic field, and a Gauss meter for detecting the magnitude of the magnetic field in the test environment.

2. A detection device for the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 1, characterized in that: The square test box (6) is provided with a sensor interface (1), the sensor interface (1) is electrically connected to a digital electronic detonator (10) internally, and the sensor interface (1) is electrically connected to a small light bulb (9) externally.

3. A detection device for the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 1, characterized in that: The dynamic pressure loading system generates dynamic pressure by igniting a mixture of combustible gas and air in a shock tube (11) to break the membrane, wherein the combustible gas is composed of one or more of hydrogen, methane and acetylene.

4. A detection device for the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 1, characterized in that: The high temperature loading system comprises a terminal (4) mounted on a square test box (6), the terminal (4) being electrically connected to a nickel-chromium heating wire (21), and the heat sensing portion of the contact thermocouple (3) being inserted into the interior of the square test box (6).

5. A method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation, characterized in that: A detection device for detecting the reliability of digital electronic detonators under simulated multi-source stimulation according to any one of claims 1 to 4 comprises the following method steps: St1. Dynamic pressure loading test of digital electronic detonator (10) in simulated delayed blasting environment: The digital electronic detonator (10) is fixed to the upper end of the lifting platform (7), and the height of the lifting platform (7) is adjusted so that the digital electronic detonator (10) is located at the center of the square test box (6), thereby triggering the control module of the digital electronic detonator (10); The dynamic pressure intensity is changed by adjusting the flammable gas composition, type, initial pressure and length of the shock tube (11), and acts on the digital electronic detonator (10) in the square test box (6); Observe the brightness change of the small light bulb (9) and analyze the corresponding detonation reliability of the digital electronic detonator (10); St2. Static pressure loading test of digital electronic detonator (10) in simulated deep water blasting environment: By filling the square test box (6) with water and adding high-pressure gas to simulate water pressure at different depths, the water resistance and pressure resistance of the digital electronic detonator (10) are analyzed, or the digital electronic detonator (10) is tested at the same water pressure at different depths and for different action times to trigger the control module of the digital electronic detonator (10); Observe the brightness change of the small light bulb (9) and analyze the corresponding detonation reliability of the digital electronic detonator (10); St3. High temperature loading test of digital electronic detonator (10) simulating high temperature blasting environment: The digital electronic detonator (10) is heated by winding a nickel-chromium heating wire (21) around the outside of the digital electronic detonator (10), and the surface temperature of the digital electronic detonator (10) is reacted by a contact temperature sensor to trigger a control module of the digital electronic detonator (10); Observe the brightness change of the small light bulb (9) of the digital electronic detonator (10) under different temperature loads, and analyze the corresponding detonation reliability of the digital electronic detonator (10); St4. Electromagnetic loading test of digital electronic detonator (10) in simulated on-site blasting environment: A copper coil (23) is wound around the periphery of a silicon-aluminum magnetic ring, and two ends of the copper coil (23) are connected to a DC high-voltage generator (22), so that a magnetic field is formed inside the copper coil (23), and the magnitude of the magnetic field inside the coil is measured by a gauss meter; The digital electronic detonator (10) is placed inside the coil, and the intensity of the magnetic field is changed by changing the output voltage of the DC high voltage generator (22), thereby triggering the control module of the digital electronic detonator (10); Observe the brightness change of the small light bulb (9) of the digital electronic detonator (10) under different magnetic field strength loading, and analyze the corresponding detonation reliability of the digital electronic detonator (10); St5. Static electricity loading test of electronic detonator digital electronic detonator (10) in simulated on-site blasting environment: By connecting the positive pole of a DC high-voltage generator (22) to the upper end of a lifting platform (7), setting the voltage output by the DC high-voltage generator (22), measuring the distance from the upper end of the lifting platform (7) to the top surface of a square test box (6), and changing the output voltage of the DC high-voltage generator (22) to change the electric field intensity, the control module of the digital electronic detonator (10) is triggered; Observe the brightness change of the small light bulb (9) of the digital electronic detonator (10) under different electrostatic loadings, and analyze the corresponding detonation reliability of the digital electronic detonator (10); St6. Dynamic pressure and electromagnetic composite loading test on digital electronic detonator (10) in simulated on-site blasting environment: The St1 and St4 test configuration modes are integrated to trigger the control module of the digital electronic detonator (10), and the brightness change of the small light bulb (9) of the digital electronic detonator (10) under the combined loading of dynamic pressure and electromagnetic field is observed to analyze the corresponding detonation reliability of the digital electronic detonator (10); St7. Static pressure and electromagnetic composite loading test on digital electronic detonator (10) simulating on-site blasting environment: The St2 and St4 test configuration modes are integrated to trigger the control module of the digital electronic detonator (10), observe the brightness change of the small light bulb (9) of the digital electronic detonator (10) under the combined loading of static pressure and electromagnetic field, and analyze the corresponding detonation reliability of the digital electronic detonator (10); St8. Dynamic pressure and high temperature composite loading test on digital electronic detonator (10) simulating on-site blasting environment: The St1 and St3 test configuration modes are integrated to trigger the control module of the digital electronic detonator (10), and the corresponding detonation reliability of the digital electronic detonator (10) is analyzed by observing the brightness change of the small light bulb (9) under the combined loading of dynamic pressure and high temperature of the digital electronic detonator (10); St9. High temperature and electromagnetic composite loading test on digital electronic detonator (10) simulating on-site blasting environment: The St3 and St4 test configuration modes are integrated to trigger the control module of the digital electronic detonator (10), observe the brightness change of the small light bulb (9) of the digital electronic detonator (10) under the combined loading of high temperature and electromagnetic, and analyze the corresponding detonation reliability of the digital electronic detonator (10); St10. Dynamic pressure, high temperature and electromagnetic composite loading test on digital electronic detonator (10) in simulated on-site blasting environment: The control module of the digital electronic detonator (10) is triggered by integrating the test configuration modes of St1, St3 and St4, and the corresponding detonation reliability of the digital electronic detonator (10) is analyzed by observing the brightness change of the small light bulb (9) of the digital electronic detonator (10) under the combined loading of dynamic pressure, high temperature and electromagnetic. St11. In the above steps St1 to St10, there are two changing states in the process of analyzing the detonation reliability by observing the brightness change of the small bulb (9): Brightness change state of the small light bulb (9) 1: if the brightness of the small light bulb (9) becomes dim or even goes out and no longer returns to its original normal brightness, it means that the detonation performance of the digital electronic detonator (10) is weakened or refuses to explode; The second state of brightness change of the small light bulb (9): if the brightness of the small light bulb (9) does not change or can recover to its original normal brightness after dimming, it means that the digital electronic detonator (10) can be safely detonated.

6. The method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 5 is characterized in that: In step St6, the configuration of the dynamic pressure and electromagnetic composite loading test of the digital electronic detonator (10) simulating the on-site blasting environment is as follows: The digital electronic detonator (10) is fixed to the upper end of the lifting platform (7), and the height of the lifting platform (7) is adjusted so that the digital electronic detonator (10) is located at the center of the square test box (6); The dynamic pressure intensity is changed by adjusting the flammable gas composition, type, initial pressure and length of the shock tube (11), and acts on a digital electronic detonator (10) in a square test box (6). Then, the electromagnetic coil is sheathed on the outside of the digital electronic detonator (10), and the output voltage of the DC high-voltage generator (22) is adjusted to adjust the magnetic field intensity.

7. The method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 5 is characterized in that: In step St7, the configuration of the static pressure and electromagnetic composite loading test of the digital electronic detonator (10) simulating the on-site blasting environment is as follows: The coil is sheathed on the outside of the digital electronic detonator (10), and water is filled into the square test box (6). The output voltage of the DC high-voltage generator (22) is adjusted to control the magnetic field strength, and high-pressure gas is injected into the square test box (6) to simulate the water pressure at a corresponding depth.

8. The method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 5 is characterized in that: In step St8, the configuration of the dynamic pressure and high temperature composite loading test of the digital electronic detonator (10) simulating the on-site blasting environment is as follows: The digital electronic detonator (10) is heated by winding a nickel-chromium heating wire (21) around the outside of the digital electronic detonator (10), and the dynamic pressure intensity is changed by adjusting the flammable gas composition, type, initial pressure and length of the shock tube (11) to act on the digital electronic detonator (10) in a square test box (6).

9. The method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 5, characterized in that: In step St9, the configuration of the high temperature and electromagnetic composite loading test of the digital electronic detonator (10) simulating the on-site blasting environment is as follows: The digital electronic detonator (10) is heated by winding a nickel-chromium heating wire (21) around the outside of the digital electronic detonator (10), and a copper coil (23) is sheathed around the outside of the digital electronic detonator (10) to adjust the output voltage of a DC high-voltage generator (22).

10. The method for detecting the reliability of digital electronic detonators under simulated multi-source stimulation according to claim 5, characterized in that: In step St10, the configuration of the dynamic pressure, high temperature and electromagnetic composite loading test of the digital electronic detonator (10) simulating the on-site blasting environment is as follows: The digital electronic detonator (10) is fixed to the upper end of the lifting platform (7), and the height of the lifting platform (7) is adjusted so that the digital electronic detonator (10) is located at the center of the square test box (6); The dynamic pressure intensity is changed by adjusting the flammable gas composition, type, initial pressure and length of the shock tube (11), and acts on the digital electronic detonator (10) in the square test box (6); A nickel-chromium heating wire (21) is then wound around the outside of the digital electronic detonator (10) to heat the digital electronic detonator (10), and a copper coil (23) is sheathed around the outside of the digital electronic detonator (10) to adjust the output voltage of the DC high-voltage generator (22).

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