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 extraction of thick gentle seams. Production tests of such a system (1959) with the LG NK-1 shield confirmed the high efficiency and reliability of the mobile support of the protective type.