GB/T 8031-1987Industrial electric blasting cap (English PDF)

4.1 Classification of industrial electric detonators

Industrial electric detonator use is divided into.

a) Ordinary electric detonator;

b) Permitted Electric Detonator coal mine;

c) seismic exploration electric detonators.

4.2 Industrial electric detonator named

Industrial electric detonator shall be named in line with WJ/T 9031 requirements.

5.1 Appearance

5.1.1 The surface should not have floating medicine, rust, blisters, cracking, incomplete.

5.1.2 Permitted Electric Detonator Mine foot line should be composed of two different colors of insulated wire composition, there should be no wire insulation be damaged and the core wire corrosion.

5.2 Coding

Industrial electric detonator coding shall comply with the requirements of GA441.

Do not mark paragraph 5.3 each hair extension electric detonators other segments should be clearly marked area. Coal Mine Permissible extension of electric detonators using foot line segment color area when not, should adopt the colors used are shown in Table 1.

Table 1 Coal Mine Permissible extension of electric detonators paragraphs foot line color

Block number 12345

Foot line color gray, red gray, yellow gray, blue, green, white, red

5.4 Foot line

5.4.1 length tolerance should be ± 5% of the nominal value.

5.4.2 Insulation thinnest point thickness. PVC material shall not be less than 0.3mm; other materials should not be less than 0.25mm.

5.4.3 anti-high-voltage breakdown properties. pass to (5000 ± 50) V AC voltage, continuous 60s, to the leakage current value divided into. insulation class a Level not higher than 0.1mA/m; insulation class II is not higher than 1.2mA/m.

5.5 Material

Industrial electric detonator should not use paper envelope; Permitted Electric Detonator coal mine should not use aluminum and its alloys parts.

5.6 Performance

5.6.1 Full resistance

5.6.1.1 When the whole industrial electric detonators resistance less than or equal to 3ohm, relative error should be less than the nominal value ± 25%.

5.6.1.2 When the whole is greater than the resistance 3ohm, relative error should be less than the nominal value ± 15%.

5.6.2 Electrical Properties

Electrical performance of industrial electric detonator shall comply with the requirements of Table 2.

Table 2 Industrial electric detonator electrical performance

project

Technical Specifications Ordinary electric detonator, electric detonator Xu Mine Type of Type I II III Seismic exploration electric detonators the maximum non-firing current/A >=0.20 >=0.30 >=0.80 >=0.20 the minimum firing current/A <=0.45 <=1.00 <=2.50 <=0.45 Combustion can punch/(A2 · ms) >=2.0 <=18.0 80.0 ~ 140.0 0.8 ~ 5.0 SERIES INITIATION current/A <=1.2 <=1.5 <=3.5 <=3.5 Electrostatic Sensitivity a/kV >=8 >=10 >=12 >=25 Note. The table in bold mandatory elements.

a static sensitivity expressed in feet between the line and the envelope electrostatic withstand voltage.

5.6.3 Seismic Performance

After the vibration test, industrial electric detonators should not explode, structural damage, short circuit, open circuit and resistor unstable phenomenon, the whole resistance should meet 5.6.1 requirements.

5.6.4 Initiating Capacity

No. 6 industrial electric detonator shall ripped through 4mm thick sheet of lead No. 8 industrial electric detonator shall ripped through 5mm thick sheet of lead perforation diameter should be not less than 7mm.

5.6.5 Tensile properties

Loss not lower than 19.6N static pull effect lasted 1min, closures and feet line of industrial electric detonators should not occur visual evidence or bad move, remove the ignition test done, it should explode completely.

5.6.6 Water resistance

5.6.6.1 ordinary electric detonators and electric detonators Mine Xu was immersed in water to maintain pressure 0.05MPa 4h, after removing the test do get angry, should burst Fried completely.

5.6.6.2 seismic exploration electric detonator was immersed in water pressure of 0.3MPa maintained 72h, after removing the ignition test done, it should explode completely.

5.6.7 Heat resistance

4h kept not lower than 100 °C environment, industrial electric detonators should not explode.

5.6.8 Flammable gas safety

Permitted Electric Detonator detonate when the coal mine at a concentration of 9% of the combustible gas, the gas can not ignite.

5.6.9 Delay Time

Extended electric detonator in the name of an extension of time should generally be in line with the requirements of Table 3, the delay time can be negotiated other series with the user.

Table 3 in the name of an extension of time series

1 ms series

Series 2 ms

3 ms series

The first series of 4 ms ms 1/4 second series Half a second series Second series 100 12.5 00 12.5 00 12.5 00 0.6 00 0.25 00 0.125 00 0.50 2 25 25 12.6 37.5 25 12.6 37.5 12.637.5 0.6 1.5 1 0.250.126 0.375 0.50 0.26 0.75 1.00 0.51 1.50 350 50 37.6 62.5 37.662.5 37.6 62.5 50 2 1.6 2.5 1.00 0.76 1.25 2.00 0.625 0.500.376 1.51 2.50 475 75 62.6 92.5 62.687.5 62.6 87.5 75 3 2.6 3.5 1.50 1.26 1.75 3.00 0.875 0.750.626 2.51 3.50 5110 92.6 130.0 112.5 87.6 4 3.6 4.5 10087.6112.4100 1.000.876 1.125 2.00 1.76 2.25 4.00 3.51 4.50 6150 130.1 175.0 - - - 125,112.6 137.5 5 4.6 5.5 2.50 2.26 1.375 1.251.126 2.75 5.00 4.51 5.50 7200 175.1 225.0 - - - 150,137.6 162.5 6 5.6 6.5 3.00 2.76 3.25 6.00 1.625 1.501.376 5.51 6.50 8250 225.1 280.0 - - - 175,162.6 187.5 7 6.6 7.5 - - - 3.50 3.26 3.75 7.00 6.51 7.50 9310 280.1 345.0 - - - 200,187.6 212.5 - - - - - - 4.00 3.76 4.25 8.00 7.51 8.50 10380 345.1 420.0 - - - 225,212.6 237.5 - - - - - - 4.50 4.26 4.74 9.00 8.51 9.50 11 460 420.1 505.0 - - - 250237.6 262.5 - - - - - - - - - 10.009.5110.49 12550 505.1 600.0 - - - 287.5 275262.6 - - - - - - - - - - - -13650 600.1 705.0 - - - 300,287.6 312.5 - - - - - - - - - - - -14760 705.1 820.0 - - - 337.5 325312.6 - - - - - - - - - - - -15880 820.1 950.0 - - - 362.5 350337.6 - - - - - - - - - - - -161020 1110.0 950.1 - - - 387.5 375362.6 - - - - - - - - - - - -12001110.11300.0 17 - - - 400387.6 412.5 - - - - - - - - - - - -14001300.11550.0 18 - - - 425412.6 437.5 - - - - - - - - - - - -17001550.11850.0 19 - - - 450437.6 462.5 - - - - - - - - - - - -20001850.12149.9 20 - - - 475462.6 487.5 - - - - - - - - - - - -21 - - - - - - 500487.6 512.4 - - - - - - - - - - - -

Note 1. Table 2 ms series Coal Mine Permissible MS Delay time by electric detonators, the series is mandatory.

Note 2. In addition to the last paragraph, any period of extension of the electric detonator for the segment size limit on the name of an extension of time and the delay time in the segment nominal value (accurate to this table the number of bits), lower specification limit for the segment in the name of an extension of time and the lower the nominal value of the delay time (accurate to the number of bits in this table) plus a bottom Number; the last paragraph on the extension of electric detonators specification limits of this paragraph on behalf of the delay time difference between the specification limits under this paragraph and, together with the extension of time on behalf of this paragraph.

5.6.10 Inverted initiation capability

General electric detonators and electric detonators After Coal Mine Permissible vibration test, inverted initiation, the 6th industrial electric detonator shall ripped through 4mm thick sheet of lead on the 8th Industrial electric detonator shall ripped through 5mm thick sheet of lead perforation diameter should be not less than 7mm.

6.1 Appearance

Visual inspection.

6.2 Coding

Visual inspection. Allows encoding test and visual inspection merger.

6.3 Do not sign

Visual inspection. Do not allow the paragraph mark inspection and visual inspection merger.

6.4 Foot line

6.4.1 Length. 1mm by dividing the value of the ruler to measure.

6.4.2 Insulation thinnest point thickness. Press 18014-2008 in 6.1.2 with GB/T performed. Each of the three foot line measurement, point spacing not less than 300mm, the arithmetic average of two foot line measured values as a measurement result.

6.4.3 anti-high-voltage breakdown properties. Cut foot detonator cord, which is wound into a spiral into a beaker containing 3% sodium chloride aqueous solution, the pass in (5000 ± 50) V AC voltage, continuous 60s, measured leakage current value, and in terms of leakage current per unit length to mA/m.

6.5 Full resistance

With a resolution of not less than 0.1ohm, measuring current less than 30mA of resistance measuring instrument and the sample foot cable connected in the resistance measuring instrument Read the value on the work of state resistance and resistance measuring instrument recording.

6.6 Maximum current misfire

Through the sample to meet the requirements of Table 2 of constant DC current (with a resolution of no less than the current measuring instrument measuring 0.01A), continued 5min, observe whether the sample explosion, and record the test results. Allow the test sample after the series.

6.7 The minimum firing current Conducted in accordance with WJ/T 9044's.

6.8 Combustion can punch

Conducted in accordance with WJ/T 9039's.

6.9 Initiating current series

Connect the 20 rounds of the sample series, through a constant DC current requirements in accordance with Table 2 (with a resolution of not less than 0.05A current measuring instrument Measurement), the duration of not less than 20ms, to observe whether the sample explosive, and record the test results.

6.10 Electrostatic Sensitivity

6.10.1 ordinary electric detonators and electric detonators Coal Mine permissible according to the provisions WJ/T 9042's. Wherein. the role of discharge from the capacitor capacity 2000pF, series resistance 0kohm.

6.10.2 electric detonators geological exploration conducted in accordance with WJ/T 9042's. Wherein. the role of discharge from the capacitance of the capacitor is 500pF, string Union resistance is 5kohm.

6.11 Seismic Performance

The method will be defined by the level of 6.5 full inspection WJ231 resistance sample into line with the requirements, the cam speed is 60r/min ± 1r/min, drop height 150mm ± 2mm wooden central vibration test machine, the vibration test machine wooden plugged the gap, pressed cover, Continuous vibration 10min, remove the sample checked by the method 6.5 full resistance of the sample, read and record the value.

6.12 Initiating Capacity

6.12.1 according to the provisions of GB/T 13226 were;

6.12.2 allows the use of other test methods;

6.12.3 allows initiating the series of current and deferred time trial merger.

6.13 Tensile Properties

Applying a corresponding pair of lines between the sample housing and reverse foot line static tension, sustained 1min, remove the sample visual inspection and test records result.

6.14 Water resistance

Conducted in accordance with GB/T 13227 of.

6.15 Heat resistance

Conducted in accordance with WJ/T 9043.1 of.

6.16 Flammable gas safety

Conducted according to the provisions of GB 18096.

6.17 Delay Time

According to the provisions of GB/T 13225 conducted, wherein. time meter resolution is not less than 0.1ms; detonating current (constant DC current) I type is 1.2A; II type is 1.5A; III type is 3.5A. Extended time measurement Supplementary Regulations Appendix A.

6.18 Inverted initiation capability

The horizontal grid within the grid holder, the sample was fixed to an explosion inside the detonator holder, and make it perpendicular to the lower inverted grid side Central location, close to the bottom of the grid (see Appendix B), will be connected to the foot line of the sample and detonating wires, through to meet the requirements of Table 2. The constant straight Current flow, after initiation, detection stereotype perforation diameter, and record the test results.

7.1 Inspection classification

Industrial electric detonator inspection into the factory inspection and type testing.

7.2 Test Project

7.2.1 Factory inspection

Industrial electric detonator factory inspection items are shown in Table 4.

Table 4 Industrial electric detonator factory inspection items

Test item number

General electric detonators and electric detonators Mine Xu seismic exploration electric detonators Batch test cycle test required Reg number Testing method the reg number Batch test cycle test required Reg number Testing method the reg number

1 Appearance sqrt - 5.1 6.1 sqrt - 5.1 6.1 2 encoding sqrt - 5.2 6.2 sqrt - 5.2 6.2 Do not mark paragraph 3 sqrt - 5.3 6.3 sqrt - 5.3 6.3 4 foot cord length - sqrt 5.4.1 6.4.1 - sqrt 5.4.1 6.4.1 5 foot wire insulation thickness of the thinnest point - sqrt 5.4.2 6.4.2 - sqrt 5.4.2 6.4.2 6 foot line anti-high voltage breakdown performance - - 5.4.3 6.4.3 - - 5.4.3 6.4.3

7 Full resistance sqrt - 5.6.1 6.5 sqrt - 5.6.1 6.5

8 Maximum current misfire - sqrt 5.6.2 6.6 sqrt - 5.6.2 6.6 9 minimum firing current - - 5.6.2 6.7 - - 6.7 5.6.2 10 angry red can - - 5.6.2 6.8 - - 6.8 5.6.2

11 SERIES INITIATION current sqrt - 5.6.2 6.9 sqrt - 5.6.2 6.9 12 electrostatic sensitivity - - 5.6.2 6.10 - sqrt 5.6.2 6.10 13 seismic performance sqrt - 5.6.3 6.11 sqrt - 5.6.3 6.11

14 Initiating Capacity sqrt - 5.6.4 6.12 sqrt - 5.6.4 6.12 15 tensile properties - sqrt 5.6.5 6.13 - sqrt 5.6.5 6.13 16 water resistance - sqrt 5.6.6 6.14 - sqrt 5.6.6 6.14