An algorithm for optimizing the use of piezoelectric broadband sensors in the field has been developed. The amplitude of volumetric longitudinal waves from a reference source was measured in the laboratory to determine the sensitivity coefficient of piezoelectric broadband sensors. The possibility and expediency of using these sensors for practical purposes is considered. It has been established that they can be used in mining. By creating portable field equipment and adapting laboratory calibration methods, we have successfully diagnosed individual lines of a stationary acoustic emission automated monitoring system for underground structures in the field. An algorithm of actions is proposed and a method for adapting the developed laboratory techniques for mining operations with concrete reinforcement forming underground structures is substantiated. Keywords: acoustic emission, monitoring, calibration, elastic wave.