What was the last name? DOB? Do you know the name of the mine?
Here are some things you can try to get info.
The State kept annual Mining Reports. These are very thick books. Many major libraries have some in their reference areas. These list men injured and men killed, along with info about the mine, production, etc.
The library at
California PA has a large collection of area newspapers on microfilm.
Ancestry.com has papers for Charleroi and Monessen. If you post the man's name, perhaps another researcher will search the papers for you. Both these papers carried mining articles.
WWI or WWII draft cards often contained the name of the mine.
Being 1939, you should be able to find some info, versus if it had happened in the 1800s. Mines often had roof collapses.
Oldpathminer (I think that's the name) website has mine disasters listed.
Judy