This picture I believe was taken down a mine in the Hamilton area. Here the working conditions did not appear too bad. However all the miners were affected by the dust which clogged up their lungs. Inevitably the life of the miner was shortened.
My father in law worked between 1918-1922 in a mine near Sandal in the West Riding of Yorkshire near Wakefield. He started in the mines at 14 and left when he was 18. He described who he had to spend some of the time on his side hewing coal. This he did when he was 16-18. The seams were often small and that meant you had to lie on your side for the whole shift.