mudcap

From mud +‎ cap.

mudcap (plural mudcaps)

1. (mining) An explosive charge covered in mud, sand, or similar material before detonation, instead of being placed in a borehole.

mudcap (third-person singular simple present mudcaps, present participle mudcapping, simple past and past participle mudcapped)

1. (mining) To cover an explosive charge in mud, sand, etc. before detonation, instead of placing it in a borehole.