Different companies (and different AOCs with the same company) will have different approach minima.
Otherwise, its all fairly logical
- there will be a standard missed approach procedure, initiated at the missed approach point if not visual.
- Since it is a radar apoproach, then if you lose the radar, you cannot do the approach.
If there is an obstacle which gets in the way, as you say, you may be able to come in from another direction. Alternatively, you may be able to make an approach to the obstacle, and when you get VMC, continue below the cloud to the destination - depends on the circumstances and the company SOP.