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Measurement device and characterization method for explosive temperature power reduction degree

A measuring device and technology for explosives, which are applied in directions such as material explosiveness, and can solve problems such as cumbersome calculation of the power attenuation of explosives.

Pending Publication Date: 2016-12-21
HONGDA MINING IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The purpose of the present invention is to provide a temperature reduction degree of explosives in view of the shortcomings of the above-mentioned existing explosive shock wave pressure peak attenuation that cannot essentially reflect the explosive power attenuation and the calculation of the total energy requires additional detonation velocity measurement and the calculation is relatively cumbersome. In practical application, this device can quantitatively characterize the effect of water bath heating time on explosive power attenuation, so as to guide the design of blasting scheme in high-temperature fire zone

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  • Measurement device and characterization method for explosive temperature power reduction degree
  • Measurement device and characterization method for explosive temperature power reduction degree
  • Measurement device and characterization method for explosive temperature power reduction degree

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Embodiment 1

[0056] Such as figure 1 As shown, this embodiment provides a device for measuring the temperature reduction degree of explosives, which includes an explosive 1 , an underwater explosion tank 2 , a pressure sensor 3 and an oscilloscope 4 .

[0057] The explosive 1 is an emulsion explosive, which can be sensitized by a physical sensitizer or a chemical sensitizer, such as glass microspheres, perlite, NaNO 2 etc. It can be heated in a water bath after packaging, such as figure 2As shown, the explosive 1 is first placed in the water bath in the water bath thermostat 5 for heating, and then placed in the underwater explosion tank 2 after heating for a certain period of time; wherein, the water bath thermostat 5 can adjust the temperature of the water bath, and its temperature adjustment range is between room temperature and Between 100°C and the temperature control accuracy is 0.5°C, which is used to simulate the water bath environment of the powder roll in the high temperature b...

Embodiment 2

[0065] This embodiment provides a method for characterizing the temperature reduction degree of explosives, the method comprising the following steps:

[0066] Step 1, placing explosives of a certain quality in a water bath in a water bath incubator and heating for a certain period of time;

[0067] Step 2. Place the pressure sensor in the underwater explosion tank and connect it to an oscilloscope;

[0068] Step 3, placing the explosive heated in the water bath in the underwater explosion tank for detonation;

[0069] Step 4, measuring the pressure-time history curve through the pressure sensor and the oscilloscope;

[0070] Step 5, changing the quality of the explosive that has not been heated in a water bath to obtain the corresponding first bubble pulsation period;

[0071] Step 6, deduce the temperature reduction degree calculation formula according to the first bubble pulsation cycle, and calculate the temperature reduction degree after the explosive water bath heating...

Embodiment 3

[0086] The difference between this embodiment and embodiment 2 is: in step 6, the derivation process of the calculation formula of the temperature reduction degree is as follows:

[0087] 1) After the explosive explodes underwater, the period of the first bubble pulse is as follows:

[0088] T b = K · ρ 1 2 · ( W · Q ) 1 3 / P h 5 6

[0089] Among them, T b is the first bubble pulsation period, K is the coefficient, ρ is the liquid density, W is the mass of the explosive, Q is the detonation heat of the explosive, P k is the total water pressure at the explosion depth;

[0090] 2) order Rewrite the above...

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Abstract

The invention discloses a measurement device and characterization method for an explosive temperature power reduction degree. The device comprises explosive, an underwater explosion tank, a pressure sensor and an oscilloscope, wherein the explosive is arranged in the underwater explosion tank after being heated in water bath, and the pressure sensor is arranged in the underwater explosion tank, and is connected with the oscilloscope. The water bath is generated in a water-bath constant-temperature tank, and the water-bath constant-temperature tank can adjust a temperature of the water bath. In measurement, the explosive heated by water bath is ignited, a pressure time travel curve can be measured through the pressure sensor and the oscilloscope, the weight of the explosive which is not heated by water bath is changed to obtain a corresponding first bubble pulsation period, a temperature power reduction degree calculation formula can be derived according to the first bubble pulsation period, and the temperature power reduction degree of the explosive heated by water bath can be calculated. In actual application, the device can quantitatively characterize the effect degree of the water bath heating time to the explosive power attenuation and further can guide an explosion scheme design in a high-temperature fire area.

Description

technical field [0001] The invention relates to a measuring device, in particular to a measuring device and a characterization method for the temperature reduction degree of explosives, belonging to the technical field of high-temperature blasting engineering. Background technique [0002] High-temperature fire areas are likely to cause accidental explosions or premature explosions during open-air perforation blasting, which seriously restricts the completion of stripping production tasks. Therefore, in order to ensure the safety of blasting mining, blasting equipment needs to be protected. One of the protective measures is to put the explosives in a water environment. Among them, this protective measure was put forward relatively late, and there is no suitable measurement device and characterization method for the attenuation of explosive energy after heating in a water bath. Traditionally, some scholars use the shock wave peak value to calculate the pressure desensitizatio...

Claims

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Application Information

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IPC IPC(8): G01N25/54
CPCG01N25/54
Inventor 林谋金马宏昊刘畅王佩佩刘翼王飞
Owner HONGDA MINING IND
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