Injuries excavating/prodding

What follows is the PowerPoint presentation named "Injuries excavating", formatted as a webpage.

Humanitarian Demining

Part 6: Injuries excavating

This is not meant to be a "horror-show" so I have kept the pictures of injury to a minimum. However, it can be a powerful training aid if deminers are shown the risks that they run, so a few images of injury are included.

My opinions are based on the Database of Demining Accidents that I began in 1998 and now maintain for UNMAS/GICHD. This is the only global compilation of accident records and it is now large enough (more than 500 victims) for it to be an accepted source of reliable information.

Demining accidents are rare - but most of them occur when the deminer is excavating or prodding to expose a mine. See also Protection needs in HD - the facts. This paper is several years old, but the conclusions are still true.

Accidents occur because:

• The tool being used is inappropriate for delicate work.
  Obvious examples are the larger digging tools already seen.
• The deminer is working too quickly or without appropriate caution.
  He may be pressed to work quickly, sometimes he is racing his friends, or he may simply be bored.
• The deminer or detector failed to position the reading correctly.
  The detector may have been a metal detector or a dog. A dog's signal is usually checked with a metal-detector because dogs are rarely able to be precise.
• The mine is very sensitive or on its side.
  Some mines may be damaged over time and become very sensitive. A few items of UXO can be ultra-sensitive. A mine on its side can mean that a deminer is working absolutely correctly and still initiates it.
• There are roots over a mine and pressure in a safe place pulls the roots.
  A root carpet frequently spreads over mines in tropical areas.

The picture above shows two M14 US mines in Cambodia. You can see fine roots in the alluvial soil around them. One of the mines is on its side with the pressure plate pointing towards the prod.

Injuries occur because:

• The user's hand is too close.
  At 4" (10cm), the blast forces from a PMN can strip the flesh from a hand. If the tool is designed for another use, such as a cementing trowel, the users hand may be positioned alongside the blade rather than behind it.
• His other hand is being used as a guide - and is too close.
  A short tool also brings the user's body very close to any blast.
• He is leaning over the excavation.
  If a tool is used two-handed, the deminer is more likely to be leaning over the detonation.
• His tool breaks up and parts hit him.
  Deminers have lost arms when parts of their tool has severely damaged the upper arm (and have died as a result). They have had deep chest penetrations from parts of the tool and its handle. Other parts have hit deminers in the face, throat, abdomen and thighs.
• He is not wearing eye protection, or not wearing it correctly.
  The wearing of a visor is by no means universal. Even when a visor is issued, it is often worn raised because the user cannot see through it clearly because the material is easily scratched.
• He stands or kneels on a missed-mine as he excavates.
  The injuries that result from kneeling on a mine or standing on it while in a crouching position can be fatal.

Anti-personnel blast mines can cause horrendous injuries, but they very rarely kill deminers. However, some of the injuries are so disabling that the Victim may die later as an indirect result.

Severe hand and arm injury is far too common. The blast forces can strip the flesh from the bone.

Remember that deminers are usually relatively unsophisticated and uneducated people. Without their hands they have little chance of being employed. In Moslem countries, the loss of a hand carries another stigma and is greatly feared.

The palm of this Afghan deminer's hand was saved simply in order to avoid making him a social leper.

The second most common severely disabling injury in demining is blindness.

No matter how small the device, if a deminer detonates it without eye protection, he has a very high chance of being blinded. A grain of sand that would not even leave a scar if it hit the victim on the cheek, will pass through an eye and do permanent damage.

The black speckling on this man's face is often called a "carbide tattoo" because it used to occur when muskets or rifles backfired. It is not carbide but hot soot - which is half burnt TNT, mine casing, earth etc.

Reducing injury

There are two approaches to reducing injury - the first is to stop the accident occurring by using improved supervision and training. The second is to develop tools and PPE that make it less likely that injury will occur in an accident.

These requirements can coincide. For example, a long tool is hard to use to dig vertically when on your knees - and it also puts the user's hand a safer distance from any explosion.

There are several examples of locally made tools and a few specialist probes where the blade is stored in the handle shown in presentation 5: Demining hand-tools . These were usually designed for a military market.

"Purpose designed" is not necessarily safer.

This is a specialist pistol prod - the titanium blade is held in jaws like a drill-bit in a chuck. Brittle materials and a design than can separate mean that it was designed to look "sexy", not to be safe or even comfortable to use for long periods. The short length means that the user's hand is too close, and makes it easier to prod the ground at a steep angle.

Locally made tools can be far more appropriate than expensive toys. This is a locally made mild-steel prod used in Bosnia. The picture shows it after an accident with one of the very small AP blast mines prevalent in the Balkans. The handle is a hard plastic. The blade is apparently mild steel and is slightly bent. The safety is enhanced because it has a long blade and the blade passes through the handle - so the tool did not separate. The "safety" element may have been unintentional because the hard handle could have shattered.

This prodding/excavation tool was made by a demining group in Afghanistan when they found bayonets were hard to source. (The Taliban had prohibited the sale of all weapons.) Its length makes it easier to use at a shallow angle than the AK bayonet alternative.

This is the same kind of replacement for a bayonet - shown with an example that was involved in an accident - and the remains of an AK bayonet after an accident.

The Afghan tool is almost a very safe design, with a long blade, a handguard made using the side-wall of a car tyre and a bicycle handlebar grip over a wooden handle to improve comfort. Unfortunately, it separates in a blast. But the blade bent and the handle did not shatter - unlike the handle of the AK bayonet that shattered into fragments. Fragments of hard plastic handles have penetrated several centimetres into the user's chest.

To improve the Afghan probe, all that was needed was for the handle and blade to be fixed together so that they could not separate.

Parts that shatter or separate

Almost all of the commonly used tools will shatter or separate in a blast. The condition of the tools is not always photographed after an accident. Here are a few examples, mostly taken by me.

This is a typical African hoe - variations on which are used around the world. Europeans may know them as a "mattock". One famous demining group calls them "long trowels" in their accident reports. The heads have separated and killed a deminer, and the shaft splinters have caused severe injury.

This is the type of "long trowel" that the same demining group have used in the Balkans. The photograph was taken after an accident. The handle of the hoe that was used is shown in splinters above an intact example. The wooden handle is dangerous even when the tool stays intact. The user's hand was severely injured in this accident.

Most accidents with pick-axes or hoes are probably caused by the user failing to pinpoint a detector reading properly. Some have occurred when metal-detectors have not been used, and the entire ground surface is excavated. In general, the use of any two-handed swinging tool invites imprecision.

This was an ordinary garden trowel - often used around the world. The user of this trowel lost several fingers. The mangled head of the trowel was discovered inside his thigh when he arrived at hospital several hours after the accident.

The user of this mild steel trowel lost a finger - with a very small AP blast mine.

This is the same kind of trowel. Locally made, each purchase differed and the welding on this example was poor. The two parts of this trowel have been placed together for the photograph. The trowel blade hit the user in the face, side-on. He was not wearing a visor. His face was cut in half. He died six weeks later in hospital.

The handle of these shears was torn away when he initiated a mine. The mine was a bounding fragmentation mine and the victim died, so it was not recorded whether damage was done to his hands.

More broken shears - notice that they broke at the weak point where the metal stopped going through the handle.

Secateurs after a blast. The handles are cast aluminium so break easily.

Most tool designs can be improved for demining purposes - and I have proved that this can be done without incurring prohibitive costs.

This is what my first design of needle probe looked like after detonating a mine in a genuine accident. The handle is shatterproof MDPE. The blade is E304 stainless steel which bends in an AP detonation without the tip breaking away. The tool is also too long to turn-around and impale the user.

Safer AVS designs of tool are shown at AVS hand-tool designs.