My nan's mother's family were miners in North-East England, moving to-and-forth between Durham, Northumberland and Cumberland, probably where there was work.
My grandad's mother's family were miners in the Black Country, concentrated in West Bromwich, though after 1900 they moved to Catleford, West Yorkshire.
I thought it may be of interest for people to read about what mining was like in 1800-1900 England. Rather than me repeat what others have written, I recommend the following links:
Within the pages of the websites linked above there are many books on the subject.
For a more academic approach, the following paper may be of interest:
Dov Friedlander, "Occupational Structure, Wages, and Migration in Late Nineteenth-Century England and Wales", Economic Development and Cultural Change, Vol. 40, No. 2. (Jan., 1992), pp. 295-318.
This is a picture of a Northumberland Miner and his family, taken from the site of the first link of this post