Most miners were employed by a Coal Master who might have several small mines in a local area. Their wage would probably be worked out based on their output. Some very small mines were worked by a family with every family member having a role to play. There was still such a mine working in East Lothian in the early 1940's.
When new, deeper mines were being dug away from existing villages the Coal Company often built miners rows - 2 roomed, single storied hovels with communal toilets out back. Because they were not near shops there was often as store too where the miner's wives could purchase groceries, on tick if they were short of cash. This often meant that they were permanently in debt to the coal company because it was a company store (This method was immortalised in the song "Owe my soul to the company store) The same principle applied in the States obviously. 'If you have a captive market, bleed them for all they are worth
Apparently Airdrie could draw in 10,000 miners on pay night to fight and drink so their wives must have been left short of cash on a regular basis.
At least most miners were given a few tons of coal per year to heat and cook with. My father worked for a coal company and when he took delivery of his first coal supply he had built the size of coal bunker you would find in a tenement in Edinburgh. When the lorry arrived it would have filled the bunker 6 times over.
A good source on Scottish mining is
Working on: Oman, Brock, Miller/Millar, in Caithness.
Roan/Rowan, Hastings, Sharp, Lapraik in Ayr & Kirkcudbrightshire.
Johnston, Reside, Lyle all over the place !
McGilvray(spelt 26 different ways)
Watson, Morton, Anderson, Tawse, in Kilrenny