Do landmines explode when you step on or off?
Anti-personnel landmines are designed to explode when as little as two kilograms of pressure is applied - or when a person steps on them or disturbs them. Anti-vehicle landmines are designed to explode when at least 200 kilograms of pressure is applied - or when a car, jeep, truck or tank drives over them.
There is a common misperception that a landmine is armed by stepping on it and only triggered by stepping off, providing tension in movies. In fact the initial pressure trigger will detonate the mine, as they are designed to kill or maim, not to make someone stand very still until it can be disarmed.
Explosions in underground mines and surface processing facilities are caused by accumulations of flammable gas and/or combustible dust mixed with air in the presence of an ignition source.
Anti-personnel landmines are prohibited under the Convention on the Prohibition of the Use, Stockpiling, Production and Transfer of Anti-Personnel Mines and on Their Destruction (or Mine Ban Convention), adopted in 1997. More than 150 countries have joined this treaty.
Anti-tank mines usually contain between 2 and 9 kg of explosive, and their fusing mechanism requires a pressure of about 100-300 kg to activate it. AP mines are smaller, with 10-250 g of explosive, and detonate under about 5-50 kg of pressure.
Sometimes the victim dies from the blast, due to loss of blood or because they don't get to medical care in time. Those who survive and receive medical treatment often require amputations, long hospital stays, multiple operations, and extensive rehabilitation.
In reality most anti-personnel mines explode the moment you step on them. The only exception are bounding mines, where stepping on them triggers a small delay. The soldier walks on and a small propellant charge throws the mine into the air behind him.
Landmines are generally buried 6 inches (15 centimeters) under the surface or simply laid above ground. Buried landmines can remain active for more than 50 years. Landmines come in two categories, anti-personnel landmines and anti-tank landmines.
An anti-tank mine (AT mine) is a type of land mine designed to damage or destroy vehicles including tanks and armored fighting vehicles. Anti-tank mines typically have a much larger explosive charge, and a fuze designed only to be triggered by vehicles or, in some cases, tampering with the mine.
The Monongah Mine Disaster is widely considered to be the worst mine disaster in American history. On December 6, 1907, mines 6 and 8 of the Monongah Mine in West Virginia suffered a devastating explosion. The explosion destroyed much of the mine as well as the surface.
How many people are killed by landmines each year?
Mines kill or maim more than 5,000 people annually. Mine and explosive remnant of war casualties occur in every region of the world, causing an estimated 15,000 – 20,000 injuries each year. One deminer is killed and two injured for every 5000 successfully removed mines.
The Ottawa Convention or the Mine Ban Treaty, was adopted in 1997, requiring the 164 states party to: Not develop, produce, acquire, use, retain, stockpile, or transfer APLs, or assist others in such actions. Destroy all current stockpiles of APLs. Identify and clear all mined areas under their jurisdiction or control.
MR BROWN: The United States last used anti-personnel landmines in 1991 during the Gulf War. There was one single incident of one munition being used in the 2002 timeframe in Afghanistan. But otherwise, the United States has not used landmines in – anti-personnel landmines in any significant way since 1991.
"Mines can, depending on their shape and what they're made of, float for kilometers downstream, (and) particularly plastic-bodied mines can float longer," Erik Tollefsen, head of the Weapon Contamination Unit at the International Committee of the Red Cross (ICRC), told Reuters in Geneva.
Landmines can remain active more than 50 years after they are planted in the ground.
Landmines cost only $3 to $75 to make and lay but, using traditional techniques, cost an average of $300 to $1000 each to remove.
The chief acute clinical characteristics of landmine injuries are blood loss and pain. Pain relief is especially important during prolonged evacuation over difficult terrain.
You are not. Can you outrun a landmine? You cannot outrun a mine, particularly a bounding mine that uses a primary charge to lift the mine out of the ground, before detonating a secondary charge that scatters metal balls or shrapnel in all directions.
Once a mine is found, the most common methods of removing it are to manually defuse it (a slow and dangerous process) or blow it up with more explosives (dangerous and costly). Research programs have explored alternatives that destroy the mine without exploding it, using chemicals or heat.
The latest estimates show that in 2021, more than 5,500 people were killed or maimed by landmines, most of them were civilians, half of whom were children.
Can you spot landmines?
Modern mines are often made of plastic, a material that metal detectors can not identify. They can also be as little as 10 cm across, and are camouflaged by the use of colour and shape. The land-mine detector developed under the HOPE project aims to detect any kind of mine in any kind of terrain.
The main issue is that, due to the large acoustic impedance mismatch between air and ground, the energy transfer from air to the ground will be very ineffective. This means that to have an appreciable effect on mines, you would need to have a large explosion in the air.
It is estimated that there are 17.2 million of landmines and UXOs in the North West Coast (NWC) [2]. The contamination of the NWC of Egypt with explosive remnants of war dates back to the military events that took place in the Western Desert during WWII, mainly El Alamein battles (I & II) in 1942.
Most countries of Southeast Asia – and all countries of Indochina specifically – are contaminated with unexploded ordnance. Most of the UXOs of today are remnants from the Vietnam War which, apart from Vietnam, also included neighbouring Cambodia and Laos, but other conflicts and civil wars have also contributed.
Any tank or other armored vehicle that rolls over one of these mines will trigger its 16.5-pound TNT charge. This is not a strong enough blast to penetrate the M1A1 Abrams' belly armor, but it would damage the tank's tracks, immobilizing it in enemy territory.
References
- https://ui.adsabs.harvard.edu/abs/2014EGUGA..1610131K/abstract
- http://www.icbl.org/en-gb/problem/what-is-a-landmine.aspx
- https://www.esa.int/Applications/Technology_Transfer/HOPE_for_detecting_landmines
- https://en.wikipedia.org/wiki/Land_mine
- https://disarmament.unoda.org/convarms/landmines/
- https://science.howstuffworks.com/landmine.htm
- https://www.icrc.org/en/doc/assets/files/other/icrc_002_0654.pdf
- https://guides.loc.gov/chronicling-america-monongah-mine-disaster
- https://alaakhamis.org/MineProbe/landmines-uxos-egypt.html
- https://borgenproject.org/10-facts-about-landmines/
- https://www.quora.com/Do-landmines-explode-immediately
- https://www.state.gov/briefing-on-the-united-states-updated-anti-personnel-landmine-policy/
- https://www.cdc.gov/niosh/mining/topics/explosions.html
- https://news.un.org/en/story/2023/04/1135252
- https://academic.oup.com/painmedicine/article/7/suppl_2/S201/1837534
- https://www.fcnl.org/updates/2022-07/issue-brief-us-policy-landmines
- https://www.reuters.com/world/europe/mines-uprooted-ukraine-dam-disaster-could-pose-danger-years-come-red-cross-2023-06-08/
- https://apopo.org/what-we-do/detecting-landmines-and-explosives/about-landmines/
- https://en.wikipedia.org/wiki/Unexploded_ordnance
- https://en.wikipedia.org/wiki/Demining
- https://www.popularmechanics.com/military/weapons/a45359966/m1a1-abrams-tank-strengths-weaknesses/
- https://www.quora.com/If-you-run-fast-enough-can-you-run-over-a-land-mine-and-dont-get-hit
- https://landminefree.org/facts-about-landmines/
- https://worldbuilding.stackexchange.com/questions/247802/landmine-detonation-by-air-explosions