Study on Acoustic Emission Characteristics of Different Felsic Metagabbros Under Hydraulic Coupling

Abstract The mechanical properties of the deep rock are impacted not only by complicated stress environment but also mineral composition. To reveal relationship between development characteristics and acoustic emission signals in evolution rocks, metagabbros with different feldspar were subjected to tests under hydraulic coupling. characteristic parameter their correlation investigated. results showed that property metagabbro was better than without mineral. had much larger AE ringing counts absolute energies, as well stronger brittleness features development. With increasing content metagabbro, a longer duration higher amplitude. During unstable crack propagation stage, exhibited four peak frequency ranges, while displayed five ranges. nonuniform more pores microcracks uniform permeability rocks highly correlated uniformity This study provides theoretical foundation for monitoring early warning water inrush risk engineering.