I recommend Redding, i mined at BH and Redding alot and found Redding to be the "Safest"
See mick he has safest in quotation marks, meanng he knows there not "safe" 
You cannot call anything with any kind of danger safe in any way. Hard to explain. If you see somebody and they pull a knife and stab you and there is no one to save you like a gaurd, it cannot be safe. Thus there is no safer mine, but there can be a "less dangerous" mine.

Safety is precautions taken by one or more people to ensure that if something goes wrong it is dealt with accordingly with as little damage from it as possible.
Like a lock on a door, just in case some murder or robber tries to break in. Or the police.