Issue 7.2, August 2003
Cost, safety, and compliance with international regulations are among the most important factors with respect to shipping explosives. The following article gives detailed insight into the transport and storage of explosives necessary for destroying mines and UXO.
The humanitarian disaster caused by landmines and UXO littered throughout more than 60 countries has created an active and growing response from the international community that could eventually lead to the elimination of the use of landmines. As mines can be very dangerous or impossible to render safe, they often must be destroyed in-situ. Quality demolition products are essential for the safety of the mine clearance experts. Delivering materials for the demining teams can be solved with reasonable economic resources and within a relatively short time; however, problems associated with explosives must be solved first. For example:
Many traditional safety precautions and procedures for destroying mines and UXO are still being used. The following section includes a short discussion of the difficulties of transporting explosives and a proposal for simplifying procedures for destroying or rendering safe mines and UXO that can easily be delivered.
Transport of Explosives
To understand the transport of explosives, a few things must be clear. First, explosives are classified as dangerous goods. The dangerous goods covered by the heading of a class are defined on the basis of their properties. The assignment of Class 1 explosive substances and articles has been assigned to a division and a compatibility group. The division is based on the results of the tests described in UN regulations. Listed below are the various divisions and compatibility groups into which Class 1 explosive substances and articles are subdivided.
Class 1: Explosive Substances and Articles
Division numbers give information on how the explosives can be transported. Explosives typical for demining can be put into one of the following divisions:
Compatibility groups inform you about how to stuff a container and how it can be transported as well. Definitions of compatibility groups of substances and articles for demining are listed in the table below.
When stuffing a container with explosives, you are allowed to have normal goods in the container as well, but under no circumstances can it contain other dangerous goods. The following chart shows what is possible to mix when stuffing a container.
|Table 2: Mixing of explosives when stuffing (by compatibility groups).|
By putting division number and compatibility group together, it is possible to stow and transport the explosives by sea or air in accordance with International Maritime Organization (IMO) regulations (transporting by ship) or in accordance with the International Air Transport Association (IATA) dangerous goods regulation (transporting by air) as follows:
Table 3 is rather theoretical and can be difficult to understand. All explosives will be listed as Class 1. In addition, they will have a division number, a compatibility number, a UN number and a proper shipping name. Typical explosives for demining can be as follows:
Typical tender for explosives for demining is:
Explosives must be delivered as soon as possible. A tender for explosives is very informative for a limited project. Transportation must be by ship since explosives, detonating cords and non-electric detonators for blasting are classified 1.1 D and 1.1 B, and the goods must be stuffed in two containers. One of the containers will have explosives and the detonating cord (approximately six tons in total or 10 pallets). The second container will have the electric detonators, the safety fuse and the non-electric detonators (approximately 600 kg on one pallet). The only reason for having two containers is because of the non-electric detonators for blasting. These detonators have an extremely low value as well, but must be stuffed separately from the explosives.
Finding a ship that will carry explosives becomes more and more difficult because the liners and insurance companies classify them as high-risk goods. Also, the liner will have restrictions as to which harbours they can go into (a lot of harbours have very heavy restrictions as to that type of goods a ship must carry). When planning such a tender, a lot of money can be saved, but the tender must be changed to one of the two following alternatives.
Storage of Explosives
Many regulations for storage of explosives exist. If explosives are classified 1.1 D and 1.1 B, there are very heavy restrictions on storage of these explosives because of the potentially fatal consequences for the surrounding area if the explosives were to go off. Storage of explosives 1.4 S are not subjected to heavy restrictions but are subject to fire regulations because if the storage caught on fire, the material would burn out without going into detonation, or in the worst case, only a very limited quantity of fragment will come out without causing serious harm to the firemen.
Explosives for Demining
Procedures for use of explosives for demining and destruction of UXO have traditionally been made by the armed forces. Reliable procedures have been developed. Explosives to be used are normally:
When blasting mines, the explosives are normally used as a small bulk charge of 100–200 g placed on the mine or even better, on the side of the mine without touching the mine. When blasting UXO, the explosives are used in bulk charge of 200–500 g placed on the shell or a minor explosives’ charge is placed in the firing channel of the UXO. From time to time to conserve explosives, improvised shaped charge containers are used, and the demining teams fill in the plastic explosives themselves. The charge is placed a little bit away from the mine or the shell without touching the UXO. Ignition of the explosives is done with electrical detonators, which are extremely reliable. The intentional firing of the detonators ensures that interruption of the firing is possible if animals or people are entering the firing area. The use of electric firing demands shot firing cable and a proper blasting machine.
In some cases, the deminers use a safety fuse with a detonator crimped on. Only a match is needed—no firing cable and no blasting machine—but it is impossible to interrupt the firing if animals or people come into the firing area. The reliability of this kind of firing system is low compared to the electric detonators and because of poor reliability and no chance for interrupting the firing; therefore, this firing system should not be recommended for use in demining. As for explosives for demining, shaped charges should be recommended as the standard operating procedure (SOP) for destruction of mines and UXO because the mines will not be touched and the shaped charges are more than sufficient for ignition of UXO as well.
When taking into consideration the problems in transportation and secure storage of explosives classified 1.1 D and 1.1 B, it should be highly recommended to demand use of shaped charges and electric detonators classified 1.4 S. The prices for the shaped charges classified 1.4 S are higher than for explosives 1.1 D, but this is not of interest. The most important thing is the price when fired on the demolitions site—what the cost has been for transportation of high explosives compared to the shaped charges, what the cost has been for storage and what the price is for improved safety for the shaped charges compared to high explosives. If the vendor includes all of those factors in the cost, the shaped charges will be competitive to high explosives.
The price for electric detonators classified 1.4 S is slightly higher compared to ordinary packed electric detonators, and adding the cost of transporting the electric detonators classified 1.4 S becomes much cheaper than the ordinary packed electric detonators. Giving up the detonating cord, the explosives 1.1 D, safety fuse and detonators for the safety fuse and demanding shaped charges and electric detonators 1.4 S, it will be easier to have the necessary explosives in a short time and with the highest possible safety for the users and during transport and storage.
*All graphics courtesy of the authors.
International Business Development
Tel: + 41 33 228 42 75
Fax: + 41 33 228 42 76
Dyno Nobel Danmark A/S
P.O. Box 1401
Tel: + 45 43 45 15 38
Fax:+ 45 43 43 22 70