How can I make a dense asteroid field?

Okay, so I'm working on a novel and I'd like to have a dense asteroid field, something akin to the old ESB Hoth field, though it doesn't need to match that exactly. The notion is there is an advanced civilization going into such a dense field to pull out desirable mine-able ores. I'm looking for a plausible explanation for how such a field could form, and persist for at least around 100 years.

So my rough parameters for such a field:

1. Reasonably dense, with at least building size asteroids, up to city size would be good.
2. Dense enough that collisions between the medium sized objects are not uncommon.
3. Not dense enough to immediately form into a planetary body.
4. It doesn't need to exist for an extended period of time, though 100 years or so would be good, event as short as 5-10 years would be ok

I was thinking something like a collision of dwarf planets or possibly small moons would create such a field, on a short time frame at least. Eventually, I would assume either form a ring, collapse into a moon, or dissipate entirely, but for a while it would be a dense area of debris that would be hazardous to navigate.

So would that be a plausible explanation, or can anyone suggest a way for such a dense asteroid field to exist, even if only for a limited time. Thanks!

Update/Clarification #1: First thanks for the answers so far.

Okay, I can see there being a bit of confusion here. What I'm looking for is a plausible explanation for a dense asteroid field similar to the one seen in the escape from Hoth in Empire Strikes Back. It need not be a long lived phenomenon in astronomical terms ( ie 10-100 years is good ), but would need to exist in such a condition for at least 10 years. It also doesn't need to be huge in terms of area, so something like a few thousand kilometers is fine, but with a minimal size of 10km in height / width / depth. The means of creating such a field can be natural or artificial. In the end I'm looking for a dense Asteroid field for use in a rough and tumble flight scene. Of course, if that is not possible, I can figure out some way to recreate the scene.

Thanks again.

posted over 5 years ago

Tov Versh‭

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