What does this research mean for the field?

Acoustic emission measurements can effectively validate multistage triaxial tests for subsurface rock characterization, revealing distinct stress-dependent behaviors across different rock types while maintaining a consistent correlation between maximum compressive strength and positive dilatancy. Novelty: ClaimNovelty.METHODOLOGICAL. Consensus alignment: ConsensusAlignment.NEUTRAL.

What question did this study set out to answer?

To establish and validate an acoustic emission monitoring protocol during multistage triaxial compression tests to evaluate subsurface rock stability for underground storage.

September 14, 2026InfrastructuresOpen Access

Use of Acoustic Emissions to Validate Multistage Triaxial Tests—A Key to Characterizing the Subsurface

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Authors

SPSabyasachi PrakashUniversity of Houston MMMichael T. MyersUniversity of Houston LHLori Hathon

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Implication

Experimental study demonstrates distinct acoustic emission behaviors during multistage triaxial tests across diverse rocks, indicating a reliable protocol for subsurface characterization.

Key Points

To establish and validate an acoustic emission monitoring protocol during multistage triaxial compression tests to evaluate subsurface rock stability for underground storage.
Conducted multistage triaxial (MST) compression testing while recording acoustic emission events across five distinct geologic formations.
Tested coarse-grained quartzose rocks (Miocene sandstone, Wilcox Formation, Cambrian sandstone) alongside fine-grained carbonate rocks (Niobrara Marl and Niobrara Chalk).
Coarse-grained samples exhibited an exponential increase in acoustic emission events with rising deviatoric stress during each stage, showing minimal dependence on confining stress.
Fine-grained chalk and marl samples produced acoustic emission events of significantly lower amplitude, indicating a ductile and diffuse failure mode.
Both rock groups demonstrated a consistent correlation ratio of 1.2 between maximum compressive strength and the onset of positive dilatancy.

Cite This Study

Prakash et al. (2026) studied this question.

synapsesocial.com/papers/6aa7b26d0926e14a848b0cfd https://doi.org/10.3390/infrastructures11090325

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Implication

Experimental study demonstrates distinct acoustic emission behaviors during multistage triaxial tests across diverse rocks, indicating a reliable protocol for subsurface characterization.

Use of Acoustic Emissions to Validate Multistage Triaxial Tests—A Key to Characterizing the Subsurface

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Implication

Key Points

Cite This Study

Use of Acoustic Emissions to Validate Multistage Triaxial Tests—A Key to Characterizing the Subsurface

Discussion

Member takes

Implication

Key Points

Cite This Study

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