FC160 Focal Charges provide a safe and effective secondary rock breakage method.
A FC160 comprises nominally 2.6kg of high explosive cast into a moulded plastic form that defines a steep angle focal cavity. A detonating cord tail is cast into the form to permit initiation by either detonators or detonating cord.
When detonated the FC160 focuses the detonation energy along the cavity axis. A stream of hot, high shock, gases are directed into the rock target that the charge is in contact with. This results in efficient breakage without the need for capping plaster charges or drilling.