you mean "safe" locations?
Sure. Asteroid belts are in fact very empty. They're not full of tumbling rocks and debris that ships have to dodge to pass through. Chances are you can't even
see the nearest asteroid from one that you happen to be on, because it's so far away (and it's so small).
Think of it this way, total mass of material in the asteroid belt is far less than the mass of the earth. In fact, to quote
Solstation:
It has been estimated that the total mass of the Main Asteroid Belt may total less than 1/1000th of the mass of the Earth. Indeed, if all asteroids down to the size of meter- or yard-sized boulders or less were combined together, the resulting object would measure less than 1,300 to 1,500 km (810 to 930 miles) across, which is less than one third to one half the diameter of the Earth's Moon.
There are very few asteroids over 100km in size. So now spread all that over the perimeter of an orbit about 2 or 3 AU in radius, and you'll find that material has to be spread VERY thinly, and the chance of encountering any of it at random is very low. After all, the Pioneer, Voyager, and Galileo and Cassini missions all made it straight through with no problem.
Even if the belt had more mass, the vast area over which its spread would still not result in crowded fields of tumbling rocks. Though occasionally a couple of asteroids will collide, and then you could locally get a cloud of debris as the asteroids dissassemble.
It's also worth bearing in mind that a lot of asteroids are stony, and most of them seem to actually be "rubble piles" - just loose conglomerations of rocks and boulders held together by feeble gravity, with dust on top. if you go to the solstation link above, you'll see
a picture of the asteroid Mathilde (here's a nifty
flyby animation of it using images taken by NEAR)- looks solid enough doesn't it? But its density is so low that it's mostly empty space - it doesn't mean it's already hollow, it means that it's a big, loose pile of rocks with lots of gaps between them.
These "rubble piles" are going to be interesting things to mine (assuming people even bother mining stony asteroids). On the one hand, you can break them up easily into manageable chunks. On the other, you have to be careful how you handle them because of that.
(I've only ever heard of rubble piles as stony asteroids, but I imagine that it's possible to find icy or nickel-iron ones too)
There's a book called "
Mining the sky" that would probably be very useful on the topic of asteroid mining and what they're actually like...