unknown canadian badge

[badgecollector]

hi all
a mate of mine recently picked this badge up in a deal. he has asked me to Id it but there is no info on a google search so i'm coming to the experts.
i dont think its military but it does have a kings crown so i'm assuming some official govt capacity pre 1953.
also it looks like the mine was possibly being mined through WW2 for uranium which may have been used for the bombs dropped on japan.
im assuming its missing some number from the middle but any information would be appreciated
cheers
bc