The Ukrainian soldier on the frontline is using a hammer to violently dismantle TNT explosives from a bomb, which appears to be a dud of a Russian FAB-500 guided bomb. This behavior seems dangerous, but it's actually very safe. Because TNT explosive is very stable and insensitive to friction, collision, and vibration. You can shoot a piece of TNT with a bullet, and it will usually just break or burn, without exploding.
To make TNT change from burning to high-speed explosion (detonation), a strong initial shock wave is needed to "excite" it. This task is accomplished by the detonator. The detonator itself is a primary explosive that is extremely sensitive to impact or heat. It first causes a small explosion, generating a shock wave of sufficient intensity. This shock wave then acts on the TNT block, causing the TNT to produce a detonation effect.
Original article: www.toutiao.com/article/1842233423010890/
Statement: This article represents the personal views of the author.