Planted explosives, also known as mines, are explosive devices that are placed in the ground or water and are designed to detonate when triggered by a person or vehicle. They are typically used in military operations, but can also be used for other purposes such as demolition or construction. Mines can be made from a variety of materials, including plastic, metal, and even wood. They can be detonated manually or remotely, and can cause significant damage and casualties if not handled properly.