From The TimeSplitters Wiki

Proximity Mine
Needs image
Ammo	20 mines
Fire Rate bullets per sec/cartridge time	N/A
Reload Time	?
Damage (per Single Shot) Head/Body/Leg	100%/100%/100%
Type	Explosive
Zoom	No
Primary Fire	Throws mine
Secondary Fire	Throws mine
Games	TS1, TS2, TSFP

Like the Remote Mine and the Timed Mine, the Proximity Mine sticks to the first thing it hits. The Proximity Mine activates about 3 to 5 seconds after it is thrown away from the player's body, and it explodes when anyone comes within a 10 foot radius of it.

If a mine becomes stuck to your body, it is possible to survive the explosion (albeit with splash damage from the explosion) if you run in the direction opposite of where the mine became stuck on to you, however, this is usually hard to determine if you didn't see the mine get thrown at you and so surviving one using this trick is mosty a matter of luck.

Unlike the Remote Mines, the Proxy Mines will remain active if the player who dispersed them is killed.