Mileage for the sake of mileage makes no sense in your case.
Cap the volume at 50/week. Vary the paces, avoid long slow runs and
don't fear doubles or medium effort interval work or fartlek.
Stick to soft ground as much as possible.
If you try too train as though you have zero speed, you will most likely get slower, weaker, discouraged and injured.
Do not bother going much over 50/week or over 180 HR until you are closer to 8:30 3000 shape.
In the fall, race at 90% effort until October. If you are on the typical NCAA XC team, most of your teammates will be slowing before mid-season and you can move up having avoided overtraining.