In the movie "North Country," Josie Aimes, played by Charlize Theron, decides to work in the mine because Josie wants to support herself and her children financially. Working in the mine offers her a stable job with good pay, which she needs to provide for her family.
"North Country" is a 2005 American drama film directed by Niki Caro and it was actually inspired by the book "Class Action: The Landmark Case That Changed Sexual Harassment Law" by Clara Bingham and Laura Leedy Gansler. The movie is a fictionalized account based on the landmark case Jenson v. Eveleth Mines, in which female miners sued their employer for sexual harassment and gender discrimination.
The film stars Charlize Theron as Josey Aimes, a single mother who moves back to her hometown in Minnesota and takes a job at the local iron mine to support her family.