This system proved to be effective while mining mountain roads, etc. In one minute, an MI-8 copter can plant up to 7000 mines in an area of up to two and a half kilometers square.
Mines are planted, the copter is back in the field.
Here is one more system for the same purpose:
This time the mines are not carried on the “wings” but they’re in a special machine inside the copter which is preloaded with mines.
Also, different types of mines can be used, as you can see on the pictures.
Hope you liked the story!