If you go to The Coal Mining History Resource Centre web site, there is a section on the home page, Accidents/Disasters, on this page scroll down to the report section were you will see a list of pdf files in year order,click on 1800-19 ,scroll down the list and you will find a mention of the incident,it is listed as St Helens, you will see your relatives name mentioned.
Hope this helps
Geoff W