I came upon your website by accident.
I do have some information regarding the above.
Firstly, my name is John Beale, full name is John Samuel Beale, and Samuel Beale was my grandfather whom I never met as he died tragically in a mining accident well before I was born. I do not know Marie Smith.
I do not know the year of the accident, but by coincidence it happened on this day, 21st November, sometime between 1924 - 1929.
There were two men at the top of the pit, (maybe Coppice or Shipley) Samuel was one of them, they were Banksmen attending to the transfer of the coal tubs from the cage as it ascended, the accident was a winding accident in as much as the cage came up too far leaving the mineshaft completely open, the two men with their heads down were pushing the empty coal tubs on to the cage but the cage was too high and they both fell to their deaths.
I dont know where Marie lives but if she is anyway near Ilkeston she could read all about the accident at the Carnegie Library in the marketplace. They have (microfilmed) copies of the local newspapers that carried the story, one paper was the Pioneer, I forget the other local paper but the library would help.
Samuel is buried at Mapperley in Derbyshire in the village churchyard, his inscription gives the relevant date and his wife Clara insisted that it stated that he was killed, as his death was premature being only 29.
I hope that information helps.