This is the 11498th most frequent Russian word.
донбасские
"Донбасские" translates to "Donbas-related" or "of Donbas" in English, referring to something associated with the Donbas region.
Here, 'донбасские' acts as an adjective describing 'шахты', specifying that the mines are located in Donbas.
Донбасские шахты славятся богатством полезных ископаемых.
Donbas mines are famous for their wealth of minerals.
In this sentence, 'донбасским' is used in dative case to describe 'семьям', indicating families from Donbas.
Многим донбасским семьям пришлось покинуть свои дома из-за конфликта.
Many Donbas families had to leave their homes due to conflict.
Here, 'донбасского' is used in the genitive case as part of the phrase 'донбасского региона', referring to the region of Donbas.