Some mines are simply long delay bombs, some long delay bombs are called mines. Depends on your military philosophy or application to RoE.
Some bombs require seismic (sp?) / shock or movement to detonate (or to commence fusing) and some require magnetic flux changes, others require a combination of different triggers to commence their pre-determined 'delay'. There is a foggy difference between mines and bombs. Some mines come in the form of a 2000lb bomb (inert unexploded or otherwise).
Mines that are designed to specifically target personel (often without discrimination) are sometimnes called anti personnel mines. It is these types of weapons that were at the recent (a few years back) centre of controversy WRT 'mines'.
Simply put, a mine is a 'just' another type of weapon. Their tactical employment is up to the force that utilises them. How they are used is a matter for RoE.