Carolin Boese published a paper entitled “Performance Evaluation of AE Sensors Installed Like Hydrophones in Adaptive Monitoring Networks During a Decametre‑Scale Hydraulic Stimulation Experiment“. The contribution has been accepted for Rock Mechanics and Rock Engineering journal. To determine the AE sensor’s suitability for use in adaptive monitoring networks, we examine performance metrics for new hydrophone-like acoustic emission (HAE) sensors, including frequency bandwidth, sensitivity, initial motion polarity, coupling, and placement quality. Due to the fact that the measured frequency content differs from injection-related noise, HAE sensors can be utilized in conjunction with hydraulic machinery, particularly the double packer probe employed for stimulation at the decameter scale. This presents a rare chance to enhance the network geometry and hence the quality of the seismic catalogs. Active ultrasonic transmission measurements from boreholes with various orientations in the rock volume, noise measurements prior to active centre punch impacts in the access galleries, and passive recordings of induced acoustic emission events are used to examine the HAE sensor features.
Reference:
Boese, C. M., G. Kwiatek, K. Plenkers, T. Fischer, and G. Dresen (2023). Performance Evaluation of AE Sensors Installed Like Hydrophones in Adaptive Monitoring Networks During a Decametre-Scale Hydraulic Stimulation Experiment, Rock Mechanics and Rock Engineering, DOI: 10.1007/s00603-023-03418-9. [ Article Page ] [ Download open-access article ]