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Determination method for storage life of emulsion explosive

A technique of emulsified explosives and a measurement method, which is applied in the chemical industry, can solve the problems of inability to accurately measure the storage days of explosives, and achieve the effects of short measurement period, stable and reliable data, and high accuracy

Inactive Publication Date: 2014-07-02
NANJING UNIV OF SCI & TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the high and low temperature cycle method and the conductivity method can only make a horizontal comparison of the stability of several explosives, and cannot accurately measure the storage days of the explosives.

Method used

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  • Determination method for storage life of emulsion explosive
  • Determination method for storage life of emulsion explosive
  • Determination method for storage life of emulsion explosive

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] (1) Measurement of detonation velocity after high and low temperature cycle

[0023] (a) Take a series of emulsion explosives produced by an emulsion explosive factory (same components, slightly different content or production process), 18 rolls with a diameter of 32 mm and a length of 200 mm, each in a group of two.

[0024] (b) Put the above-mentioned medicinal rolls in an oil bath oven at 60°C for 8 hours, and then put them in a freezer at -15°C for 16 hours as a high and low temperature cycle. After every 3 cycles, a group of explosives is taken out for the detonation velocity test, and the average value of the detonation velocity is taken. See Table 1 for the data.

[0025] Table 1 Measurement data of detonation velocity of emulsion explosive after high and low temperature cycle

[0026]

[0027] (2) Determination of detonation velocity under natural storage conditions

[0028] Measure the detonation velocity every 30 days with the same batch of emulsion expl...

Embodiment 2

[0036] (1) Measurement of detonation velocity after high and low temperature cycle

[0037] (a) Take a certain series of emulsion explosives produced by an emulsion explosive factory (same components, slightly different content or production process), 24 rolls with a diameter of 40 mm and a length of 300 mm, each in a group of two.

[0038] (b) Put the above medicine rolls in a 50°C oil-bath oven for 8 h, and then put them in a -10°C freezer for 16 h as a high-low temperature cycle. After every 3 cycles, a group of explosives is taken out for the detonation velocity test, and the average value of the detonation velocity is taken. The data are shown in Table 4.

[0039] Table 4 Measurement data of detonation velocity of emulsion explosive after high and low temperature cycle

[0040]

[0041] (2) Determination of detonation velocity under natural storage conditions

[0042] Measure the detonation velocity every 20 days with the same batch of emulsion explosive rolls of th...

Embodiment 3

[0050] (1) Determination of detonation velocity after high and low temperature cycle

[0051] (a) Take 30 rolls of a series of emulsion explosives produced by an emulsion explosive factory (same composition, slightly different content or production process), with a diameter of 50mm and a length of 400mm, each in a group of two.

[0052] (b) Put the above medicine rolls in a 40°C oil-bath oven for 16 hours, and then put them in a -5°C freezer for 8 hours as a high-low temperature cycle. After every 3 cycles, a group of explosives is taken out for the detonation velocity test, and the average value of the detonation velocity is taken. See Table 7 for the data.

[0053] Table 7 Measurement data of detonation velocity of emulsion explosive after high and low temperature cycle

[0054]

[0055] (2) Determination of detonation velocity under natural storage conditions

[0056] Measure the detonation velocity every 40 days with the same batch of emulsion explosive rolls of the ...

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Abstract

The invention discloses a determination method for storage life of emulsion explosive. The determination method comprises the following steps: step one, carrying out high and low temperature cycle experiments for known emulsion explosive, and then measuring the detonation velocity of the known emulsion explosive changing with number of cycles till the detonation velocity reaches a critical value 3,200m.s-1; step two, measuring the detonation velocity of the known emulsion explosive changing with number of storage days under natural storage conditions; step three, establishing a corresponding relation graph of the detonation velocity changing with the number of high and low temperature cycles and the number of storage days for the known emulsion explosive; step four, measuring a detonation velocity value after high and low temperature cycles of an explosive sample to be evaluated, and determining the number of cycles corresponding to the detonation velocity value; and step five, finding out the storage time of the explosive to be evaluated under natural conditions through the corresponding relation graph obtained in step three. The determination method disclosed by the invention selects the detonation velocity with small influence factors of experimental environment and manual operation as an index of detonation property so as to enable measured data to be stable and reliable, and high in accuracy, thus being a rapid and accurate method for detecting the storage life of the emulsion explosive.

Description

technical field [0001] The invention relates to the technical field of chemical industry, in particular to a method for measuring the storage period of emulsion explosives. Background technique [0002] The stability of emulsion explosives refers to the ability of emulsion explosives to maintain their physical state and explosive performance parameters without significant changes, and is an important indicator of emulsion explosives. With the prolongation of the storage time of the emulsion explosive, its explosive performance will gradually decay. Therefore, in order to ensure that the explosive performance of emulsion explosives in use meets the requirements of the national standard, there are strict regulations on the storage time of emulsion explosives. [0003] In recent years, various emulsion explosive manufacturers have tried to produce emulsion explosives with a longer storage period by changing the formula content and process. However, the only method currently a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/22
Inventor 钱华潘峰张国虎汤代红
Owner NANJING UNIV OF SCI & TECH
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