bootleg definition

bootleg means the bottom remnant or an intact portion of a hole that has been charged and blasted, and that contains no visible explosives.
bootleg means a remnant of a blast hole that remains after a blast was initiated;
bootleg means the part of a drilled blast hole that remains when the force of the explosion does not break the rock completely to the bottom of the hole;

More Definitions of bootleg

bootleg means a remnant of a blasthole that did not properly break when the blast was
bootleg records from ABC radio broadcasts 1.
bootleg means that portion of a drill hole or borehole that is not destroyed after an explosive charge has been detonated in it;
bootleg refers to the occupancy of a Wi-Fi attachment point on a pole or joint pole without a valid permit for a Wi-Fi Antenna.