unloading data from oracle dbf files
There are 3 alternatives:


create a new controlfile and try to add those file in one or more tablespaces, they look part of a partitioned object (you might want to use dbverify before running create controlfile)
use UNIX strings command, this should recover some information, but not all...
use the BBED tool as documented here:
http://orafaq.com/papers/dissassembling_the_data_block.pdf
this is a powerful tool but takes a bit of time to master


Also, if you have Oracle Support contract you might try contacting them, it is their format, 
it is the easiest path to "success".. but probably the most expensive.