This is the 18278th most frequent Russian word.
шахтеров
"Шахтеров" means "of miners" in English.
In this sentence, 'шахтеров' refers to the miners in the sense of a collective group of workers who are recognized for their occupational impact.
Шахтеров города наградили за их вклад в экономику.
Miners of the city were awarded for their contribution to the economy.
Here, 'шахтеров' relates to the thematic association with miners, as the festival is celebrated in their honor.
Наш регион известен своим фестивалем шахтеров.
Our region is famous for its miners' festival.
In this case, 'шахтеров' indicates possession, as the tools once belonged to the miners.