Estimation of the optimal wireless channel frequency range for activating an explosive material in a borehole

The article discusses the capabilities of wireless communication channels to activate charges located underground at a depth of 30 m and an analysis of the possibility of expanding their frequency range for application to explosive seismic exploration. Market proposals and patented developments focused on wireless detonation are focused on the purpose of extracting mineral raw materials in quarries and underground mines, as well as for the construction of underground tunnels for mines and subways by explosive destruction of solid rock through the activation of charges by a wireless channel. All technologies use a low-frequency magnetic field induced by a frame to form and for a greater depth of impact are concentrated in the frequency range 1-9 kHz, which is redundant for discharges at shallow depths and gives rather limited opportunities for the bandwidth and bit rate of the channel, and also does not allow to implement algorithms for seismic exploration purposes, where accurate information about the charge activation time is required, which can be ensured by synchronizing the time of the seismic station and the detonator, which requires an increase in the frequency of the magnetic field. The article analyses the propagation of a magnetic field induced by a magnetic dipole through a layered conducting medium with electrodynamic properties of soils and an assessment of the potential for expanding the frequency range of the channel.