Looks more like a larger version of the Beehive Charge Demolition No1 6" or similar which is a still drum filled with RDX/TNT with an inverted cone, which was fitted with steel legs when the charge when it explodes reversing the cone and creating a concentrated explosion.
http://www.mondial-defence.com/Uploa...e_Charge_1.pdf
Meaning of Camoflet which uses a similar technology
https://en.wikipedia.org/wiki/Camouflet