mined_block Trigger

I have a datapack on my server with an enchant which currently can bypass claims as it breaks block when the enchanted item hits a block, so I am tyring to change it to triggering when a block is specifically broken. I tried changing "effects": { "minecraft:block_hit": [ to "effects": { "minecraft:mined_block": [ however this doesnt work and the datapack fails to validate. what am I doing wrong here is this not a valid trigger?