The problem of studying physical phenomena during an explosion is currently very relevant. Some explosion processes have such short durations that only electronic equipment can detect them. The presence of a pronounced piezoelectric effect in some crystals, as well as in all ferroelectrics, makes it possible to develop low-inertia methods for measuring pressures, including shock wave pressure. Piezoelectric sensors have been used to study shock waves both here and abroad...

The chamber-shield system with the use of mobile shields was proposed for the clearance excavation of thick gentle strata. Production tests of such a system (1959) with the shield LGNK-1 confirmed the high efficiency and serviceability of the mobile shield type.