How Do Land Mines Work?

Table of Contents (click to expand)

A land mine is a bomb hidden just under the ground, designed to detonate when a person or vehicle presses on it. Despite the Hollywood myth of the "stand still or it'll go off when you step off" mine, almost all real landmines explode instantly when triggered, not on release. Anti-personnel mines need only 5–16 kg of pressure; anti-tank mines need 150–340 kg, enough to be set off by a tank but not a person. Mines used in 20th-century wars still kill and maim civilians decades after the fighting ends, with 6,279 casualties recorded in 2024 alone.

Sylvester always ends up with a blackened body after stepping on the land mines or explosives planted by Tweety. However, cartoons are not meant to be realistic, and that is certainly not the result of stepping on a land mine. In reality, these explosives are far more dangerous. You’ll end up with something much worse than a blackened body.

sylvester-after-landmine-blast
(Image source: landminesinafrica.wordpress.com)


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What Is A Land Mine?

A land mine is an explosive that is concealed just under the surface of the ground, and is designed to be detonated by pressure or proximity of a vehicle or person. These mines are designed to destroy or disable enemy targets, ranging from individual combatants to vehicles and tanks as they pass over or near these buried explosives. Land mines are one of the deadliest legacies of the 20th century, as they were used extensively in warfare. Most of the land mines were planted during the World War era. At times, thousands were planted in very small areas (<2 acres). The problem is that anti-personnel land mines continue to have tragic, unintended consequences years after a battle, even once the war has ended. Armed forces failed to keep a record of the locations of the mines, so over the years, many of them were forgotten. These mines continue to be functional, even after so many years, causing damage, injury and death to unintended victims.

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Soldiers planting land mines in 1918. (Image source :commons.wikimedia.org)

According to OneWorld International, there are currently about 100 million active land mines located in 70 countries. Furthermore, these are just the ones that have been identified. Many of the mined areas have yet to be discovered or documented.

Basic Categorization Of Land Mines

These annihilators are easy to make, cheap and effective weapons that can be distributed over large areas very quickly. They are either placed on the ground manually or by using mechanical minelayers, which can be programmed to plow the land and place the mines at specific intervals.

Land mines can be broken down into two categories:

  1. Anti-personnel (AP) mines
  2. Anti-tank (AT) mines

The basic principle for the two types of mines remains the same, the differences being the intensity of damage produced and the pressure required for detonation. An anti-tank mine is capable of blowing up whole tanks or trucks, along with the people inside it. This type requires significantly more pressure for detonation. Anti-personnel mines, however, are designed to damage armies on foot.

Anti-personnel (AP) Mines

These mines were specially designed to kill or maim infantry on the move. Military doctrine often favours maiming over killing outright, since a wounded soldier ties up far more enemy resources — medical evacuation, hospital beds, morale — than a dead one. AP mines are triggered by pressure, tripwires, or remote detonators, and once tripped, they detonate within milliseconds.

Anti_personnel_mine
An anti-personnel mine in Cambodia (Image source: commons.wikimedia.org)

AP mines are subdivided into 3 categories…

1) Blast mine

These are buried no more than a few centimeters below the ground. They are usually triggered when someone steps on the pressure plates. These mines end up disintegrating the person’s limb into fragments.

blast2) Bounding mine

These mines are buried with a small part of an igniter (a metal rod that protrudes from the ground). When tripped, a small propelling charge launches the body of the mine 3–4 feet into the air, where the main charge detonates and sprays fragments at roughly waist height, resulting in injury to a person’s head and chest.

Image 1

3) Fragmentation mine

This particular type of mine releases fragments in all directions and can also be adjusted so that the fragments are released in one general direction. The fragments are usually pieces of metal or glass.

fragment

There are several hundred types of anti-personnel mines still buried around the world.

Working Of Some Commonly Used Anti-personnel Land Mines

1) M14 blast mine

This was a small, cylindrical mine in plastic casing that was 40 mm in height with a 56 mm diameter. It was developed by the United States in the 1950s. This particular type of mine only contains about about 29 grams (1 ounce) of tetryl explosive.  The M14 has a U-shaped safety clip fitted around the pressure-triggered plate. The clip has two settings: A for Armed and S for Safety. The operator simply has to rotate the clip to the A position to activate the mine. Once it is armed, any pressure equivalent to 9 kg can set it off.

M14_mine_cutaway_-_internal_view
Sectional view of the M14 blast mine (Image source: commons.wikimedia.org)

As soon as the required pressure is applied, the Belleville spring is pushed down. This spring pushes the firing pin down onto the detonator, which ignites the main charge of Tetryl explosive.

2) S-mine or Bouncing Betty

This was a type of bounding mine used by the German army during the Second World War. It was a steel cylinder approximately 15 centimeters (5.9 in) tall without its sensor and around 10 centimeters (4 in) in diameter. A steel rod emerging from the top held the main fuse, where its trigger was attached. The standard equivalent triggering pressure was about 7 kilograms.  The main charge (which contains most of the explosive) of the mine used TNT as its explosive; the propelling charge (small amount of explosive placed at the bottom of the mine to propel it into the air) was black powder. The igniter used a percussion cap so that it detonated after minimum pressure was applied. The main fuse was set to delay the detonation by 4 seconds after it was triggered. The explosion of propelling charge sent the mine upwards into the air and shot out pellets at a considerable height before exploding.


Anti-Tank (AT) Mines

Anti-tank mines were developed as a  countermeasure against the first tanks introduced by the British near the end of the First World War. These are similar to anti-personnel mines, except that they are much larger in size. Most AT mines require a pressure equivalent of 158 to 338 kg.

M15 tank mine

The M15 mine is a large circular U.S. anti-tank blast mine that was first deployed during the Korean War. Most anti-tank mines are of the blast type, since their main goal is to completely destroy the vehicle, along with the personnel inside.

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M15 anti tank landmine (Image source: science.howstuffworks.com)

The mine consists of a large, circular rounded steel case with a central pressure plate. It has a diameter of 13.27 inches (337 mm) and a height of 4.92 inches (125 mm).The main charge is Composition B, a mixture of TNT and RDX (cyclotrimethylene trinitramine). Just like the M14, it has two settings for armed and safety. The cylindrical fuse is made of iron and is attached to the pressure plate by a copper cover. As the tank makes contact with the mine, it is activated, since the pressure plate gets pushed down. This pushes down the Belleville spring, which has a firing pin fixed at its bottom. The firing pin activates the detonator, thus igniting the explosive in the main charge.

The Hollywood Myth: Do Landmines Explode When You Step Off?

If you grew up watching action movies, you probably know “the rule”: step on a landmine, hear an ominous click, and freeze — because the moment you lift your foot, it goes off. Lethal Weapon 2, Tropic Thunder, and dozens of other films have hammered this image into pop culture. The trouble is, it’s almost entirely fiction.

Real landmines are designed to detonate the instant the trigger pressure is reached. The Belleville spring or shear-pin in the fuse releases the firing pin, the firing pin strikes the detonator, the detonator fires the booster, and the booster sets off the main charge — the whole sequence takes a few milliseconds. There is no audible click, no warning, and no chance to “carefully” lift your foot. The first sign for the victim is the explosion itself.

Bounding mines like the S-mine do have a delay, but only a fixed ~4-second timer that allows the mine to leap into the air before bursting; the timer fires whether you stand still or sprint away. A small number of specialist anti-handling fuzes are pressure-release-triggered, but these are mostly designed to thwart deminers lifting a buried mine, not to be stepped on. The Swiss Foundation for Mine Action and other demining NGOs explicitly warn that the Hollywood myth has cost lives — civilians have died trying to slowly back off a mine that, in reality, would already have gone off.

Landmines Today

Land mines remain a big threat to us today. They stand guard long after tragic conflicts have ended and continue to kill and maim without mercy or discrimination. As long as nations continue to use land mines, these devices will continue to be a danger for civilians and soldiers. Apart from humans, it poses a huge threat to other land animals as well. Perhaps that’s why completing a game of Minesweeper was always so hard…. the odds are simply stacked against us!

The picture has gotten worse, not better. Russia’s 2022 invasion of Ukraine ushered in the heaviest use of landmines anywhere on Earth in decades, including widely banned weapons like the POM-3 and PFM-1 (“petal” or “butterfly”) mines. By late 2025, five European countries — Estonia, Latvia, Lithuania, Poland, and Finland — had announced or formalised withdrawal from the Mine Ban Treaty (the 1997 Ottawa Treaty), the largest exodus from any humanitarian disarmament agreement, citing deterrence against Russia. Demining technology is racing to keep up: HALO Trust’s drone fleet logged over 85,000 flight minutes in 2024, AI-driven hazard detection systems are now processing drone imagery in under a second, and field trials in Cambodia in 2025 found that demining robots boost clearance team output by about 20%.

References (click to expand)
  1. Land mine - Wikipedia. Wikipedia
  2. How Landmines Work - Science | HowStuffWorks. HowStuffWorks
  3. C JMU. Volume 6, Issue 1 (2002) The Journal of Mine Action. James Madison University
  4. Landmine Monitor 2025 - International Campaign to Ban Landmines