Having pushed ahead with quality improvement, Koryo Nobel Explosives is now orientated towards the global market.

Electric Detonator - Cornel


The Cornel electric detonator is a No. 8 detonator that employs the NPED method, and is the safest electric detonator in the world, with excellent detonation power. As each component of the detonator exhibits static electricity resistance, stability against static electricity has been improved. Since high ignition energy is required, it has outstanding stability against leakage currents and tray currents, and since the detonator packing paper also exhibits static electricity resistance, safety is the top priority.
The interval for each stepped pulley is 25ms, which has been determined to represent the ideal interval for stepped pulleys via the extensive experience of numerous experts worldwide. For the detonator leg wire, the wire connection operation has been made more convenient by improving hangup through an 8-shaped wire winding through an automatic wire winder, and the detonator capsule has been triple-clipped to boast outstanding water resistance. Delay time is displayed on the capsule surface, while super sensitivity, MS, and LP have been made to be easily identified.

Pipe section

Blasting system

Instantaneous Detonators

This is a detonator without delay elements inside, making for an electric detonator without any time lag, as detonation occurs at the moment the electric current flows into the leg wire.

*Sleeve color : white

MS Detonators
(Milli Second Delay Detonators)

This is composed of 2~20 stages. Since the time difference interval for each stage is a short and precise time interval of 25ms, it is effective for ensuring uniform friability, flying stone control, and control of blasting and noise.

*Sleeve color : yellow

LP Detonators
(Long Period Delay Detonators)

This is composed of 2~20 stages. Since the time difference interval for each stage is a relatively long time interval of 100~500ms, it can be used effectively for blasting underground spaces such as shafts or tunnels.

*Sleeve color : red

Electric Detonators Connector

This is a detonator in which connecting efficiency has been enhanced by mounting connectable connectors without direction distinction in electric detonator parts with exposure of copper wire, and with enhanced safety against electrical risks such as static electricity.

Delay time specification


Step Delay time(ms) Color of Leg wire
Supersensitive 0 white red
2 25 blue
3 50 white purple
4 75 white green
5 100 white yellow
6 125 white black
7 150 red blue
8 175 red purple
9 200 red green
10 225 red yellow
11 250 white red
12 275 white blue
13 300 white purple
14 325 white green
15 350 white yellow
16 375 white black
17 400 red blue
18 425 red purple
19 450 red green
20 475 red yellow


Step Delay time(ms) Color of Leg wire
- - -  
2 500 white blue
3 600 white purple
4 700 white green
5 800 white yellow
6 900 white black
7 1000 red blue
8 1200 red purple
9 1400 red green
10 1600 red yellow
11 1800 white red
12 2000 white blue
13 2500 white purple
14 3000 white green
15 3500 white yellow
16 4000 white black
17 4500 red blue
18 5000 red purple
19 5500 red green
20 6000 red yellow

Average resistance per Leg wire length

Leg wire length(m) 1Resistance per 1(Ω) ± 0.3
2.5 1.05
3.5 1.20
4.5 1.35
6 1.65
8 2.00
10 2.35
12 2.70
15 3.23
18 3.75

Ignition current

Connection method Standard ignition current(Amp)
DC 1 1.5
50 4.5
100 6.75
200 9.75
AC /DC(직렬 50발 기준) 4.5 Amp

Packing standard

Length(m) Packing quantity
quantity / static electricity bag quantity / BOX quantity / BOX
2.5 10 20 200
3.5 10 20 200
4.5 10 20 200
6.0 10 20 200
8.0 10 10 100
10.0 10 10 100
12.0 10 10 100
15.0 10 10 100
18.0 10 5 50

Non-electric detonator-Nonel


For the first time domestically, a non-electric detonator system has been incorporated, produced via the excellent quality and safety of Dyno Nobel—the first company to develop a non-electric detonator. The NPED Nonel detonator boasts precision for accurate delay times and is excellent safety to prevent electrical risks.
The non-electric detonator contains a minor amount of the explosive (HMX) inside the plastic tube, detonating the detonator by transmitting shockwaves at an explosion velocity of 2,000m/sec to the inside of the plastic tube. The non-electric detonator tube is not detonated via a blow or other mechanical action, or even combustion of the tube, and is very strong against any external impact due to its triple structure. Additionally, delay times are displayed on the capsule surface, and the tube colors were made to be easily identified by classification per product (MS, LP, surface detonator).

Pipe section

Blasting system

MS Delay Detonators
(Milli Second Delay Detonators)

This is composed of 2~20 stages. Since time difference interval for each stage is a short and precise time interval of 25ms, it is effective for ensuring uniform friability, flying stone control, and control of blasting and noise.

LP Detonators
(Long Period Delay Detonators)

This is composed of 0~60 stages. Since time difference interval for each stage is a relatively long time interval of 25~500ms, it can be used effectively for blasting of underground spaces such as shafts or tunnels.

Unidet Block

By connecting a maximum of 8 tubes to the block combined with the detonator, detonation can occur, and a stepped pulley can be applied in a diversified manner by utilizing a range of delay times (7 types).

Bunch Connector

By connecting 20 tubes to the detonation fuse at a time, detonation can occur, and a stepped pulley can be applied in a diversified manner by utilizing a range of delay times (7 types).


This is a detonator for detonation capable of igniting a non-electric blasting system, and allows for supply in diversified lengths to enable safe detonation from a remote distance.

Non-electric detonator blasting machine

This is a dedicated blasting machine that enables safe and convenient detonation of a non-electric blasting system, and has designed for mounted tube cutting for convenient use.

Delay time specification

division Detonator in space Surface detonator
MS LP Unidet Unidet Block Bunch Connector Starter
Step Delay time(ms) Step Delay time(ms) Delay time(ms) Delay time(ms) Delay time(ms) Delay time(ms)
Delay time 3 75 0 25 U 400 0 0 0
4 100 1 100 U 425 17 17  
5 125 2 200 U 450 25 25  
6 150 3 300 U 475 42 42  
7 175 4 400 U 500 67 67  
8 200 5 500   109 109  
9 225 6 600   176 176  
10 250 7 700        
11 275 8 800        
12 300 9 900        
13 325 10 1000        
14 350 11 1100        
15 375 12 1200        
16 400 14 1400        
17 425 16 1600        
18 450 18 1800        
19 475 20 2000        
20 500 25 2500        
    30 3000        
    35 3500        
    40 4000        
    45 4500        
    50 5000        
    55 5500        
10   60 6000        
Tube length
4.8 / 6.0 / 7.2 / 12.0 4.8 / 6.0 / 7.2 30 / 50 / 100

Color according to surface detonator latency

Delay time(ms) 0 17 25 42 67 109 176
Color green yellow red white blue black orange

Tube color

Division Detonator in space Surface detonator
MS LP Unidet Unidet Block Bunch Connector Starter
Color red yellow red pink

Packing standard

Division Length Quantity
(m) Foil bag Box
MS & LP 4.8 10 100
6.0 10 100
7.2 10 80
Unidet 6.0 10 100
7.8 10 80
9.0 10 70
15.0 5 40
15.0 5 40
Unidet Block 4.8 10 100
6.0 10 80
7.2 10 70
Starter 30.0 2 20
50.0 1 10
100.0 1 10
Bunch Connector 4.8 10 50
6.0 10 50
7.2 10 50
※ The specifications of this product are subject to change without prior notice due to development status and quality improvement (other specifications are made to order)

Electronic detonator


The electronic detonator incorporated by our company for the first time domestically is controlled by the most advanced electronic chip and has excellent time precision at 1ms (1/1,000sec), to enable a marked reduction in blasting vibration and noise.
The Next Generation products, eDevTMⅡ and UniTronic TM600, are the most advanced electronic blasting systems, allowing control of blasting pollution through realization of high precision and unlimited stepped pulley effects, as well as immediate confirmation of detonator communication states of all without evacuation of manpower and equipment through the RDI Tester, so that operation stability and constructability have been dramatically improved in this next-generation blasting system.

Structural characteristics

More outstanding safety
· Provides outstanding safety for external electric energy, such as thunderstroke, via an internal safety device
· Provides safe test functions in the field via dual voltage (test, blasting) operation

More outstanding reliability
· Reliability of products improved by joint design of ASIC and PCB boards with US aerospace industry
· Defects in assembly processes removed by use of PCB boards produced by advance assembly
· Defective parts removed in advance through advanced automated stress tests for PCB boards
· Reliability of 2-way communication improved by 5-time reinforcement of communication signals between detonator and system
· Possibility of overlapping IDs removed by use of extensive inherent detonator IDs

Effects & Advantages

eDevTMⅡ and UniTronic TM600 electronic blasting systems have more than 1,000 times of time difference precision (0.01%) compared with electric and non-electric detonators so that resolution capability of vibration between blast holes is excellent and ultraprecision vibration-controlled blasting operations can be performed in accurate compliance with the maximum charge per hang fire designed in advance.

Electronic detonators time difference is controlled freely by units of 1ms (1/1,000sec), and safe and effective blasting operations can be performed without any reduction in blasting scale under diversified blasting conditions such as downtown tunnel construction, vertical hole construction, or bed excavation construction, etc. due to unlimited detonation stepped pulley and MS blasting effects.

Through 2-way communication between the RDI Tester and each detonator, and without requiring evacuation of manpower and equipment, it applies a system by which operation errors such as manufacturing defects in detonators and wire connection omission, etc. are reported beforehand to increase operation speeds, blasting analysis is easily achieved by automatic recording of time difference and inherent Nos. (barcodes) of all detonators after blasting operation, and tracking is possible upon loss of detonators.

Since the final blasting operation is performed after charging of the energy required for detonation in the internal battery, the electronic detonator is safe from any cut-off phenomena (whereby the detonator and explosive remain within the bedrock due to tube cutting of the leg wire for the electronic detonator or of non-electronic detonator) and enables free change of time differences even after loading within the blasting hole, to enable reliable blasting operation.

To prevent against the risk of external electric accidents such as leakage of current or thunder stroke, etc. a 2-stage safety device inside the detonator actively responds, and the final command for blasting is realized only by particular digital signals rather than general electric energy, making it the safest detonator.

Blasting System


· An electronic detonator which allows arbitrary time difference programming

Scanner 125

· Assignment of time difference by scanning of detonator ID
· Maximization of operation efficiency (for tunnels) by grouped setting method for time differences of number delay concept

Scanner 200/260

· Same function as Scanner 125
· Function integration for Scanner and RDI Tester

RDI Tester

· Confirmed 2-way communication in the blasting field
· Communication defects (wire connection error), undesignated time difference in the detonator, wire disconnection and shorting, amount of current leakage, as well as detonator defects checked

BlastBox 310 / 610

· 2-way communication with each detonator and blast
· Abnormality status in communication with each detonator checked beforehand

Duplex Harness Wire

· Auxiliary parent cable dedicated to electronic detonator providing convenient connection workability

New Connector

· Connector allowing accurate and prompt wire connection
· Connection between detonator and Harness Wire

SHOT Plus T2

· Tunnel blasting design program
· Blasting vibration analysis and modeling

SHOT Plus 5

· Open air blasting design program
· Blasting vibration analysis and modeling

Blasting sequence



3.Detonator wiring


5.RDI Test

6.Communication / Blasting


Uses for Tunnels for River
Leg wire Iron (copper coating) Iron (copper coating)
Standard length 6m 6m
The tensile strength 20kgf 20kgf
Based charge PETN PETN
Time difference range Minimum = 0ms
Maximum = 20,000ms
Minimum = 0ms
Maximum = 10,000ms
1Available per blasting detonator 800pcs 800pcs(Single Blast Box)
1,600pcs(2 in Synchro)
Quantity per box 80pcs/Box(Length 6m) 80pcs/Box(Length 6m)
※ The above performance and specifications are subject to change according to our development situation. ※ In addition to standard length of 6m, custom order supply

Molded explosive- HAKO


HAKO is a special explosive using the Neumann Effect, whereby a rectangular-shaped liner is destroyed in the lower part, and fine particles of metal are released to form a jet stream of about 10,000m/s, which collides with the target object for cutting.
Suitable products should be used according to the object material and thickness. It is a molded explosive for special purposes in which only a limited part is cut off by concentrating the explosive power in the center such as the dismantling of iron structures, dismantling of military explosives, transmission or reception towers, and path pioneering.
Type Dimension(mm)
(L x W x H)
Cutting thickness
2,000 × 30 × 20 3
HAKO 150
2,000 × 35 × 25 6
HAKO 350
2,000 × 40 × 35 10
HAKO 600
2,000 × 55 × 50 15
Principle of explosion cutting

Detonating Cord


Detonating fuses are used for various controlled blasts (outermost blasting of tunnels, stone blasting, and quarrying, etc.), and used for other detonations under special conditions not allowing the use of electric detonators, as well as for explosive substitutes.


Detonating Cord Dimension
5g/m 300(m/Roll) × 4(Roll/Box) For signal transmission
10g/m 250(m/Roll) × 2(Roll/Box) For controlled quarry blasting
20g/m 150(m/Roll) × 2(Roll/Box)
40g/m 152.5(m/Roll) × 1(Roll/Box)