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Applied Sciences, Vol. 16, Pages 8709: Study on Acoustic Emission Response and Failure Characteristics of Rock–Proppant–Rock Composite Constructions Under Uniaxial Compression
1+ week, 5+ day ago (402+ words) To reveal the bearing and instability mechanisms after filling proppants in the blasting pressure-relief fracture, four types of proppant-containing sandstone composite construction with interface inclinations of 0°, 4°, 8°, and 12° were prepared. A uniaxial compression test was conducted by combining Acoustic Emission (AE)…...
Applied Sciences, Vol. 16, Pages 8680: Analysis of Uniaxial Fatigue Mechanical Properties and Constitutive Modeling for Freeze–Thaw Cycled Red Sandstone with Double Fissures
1+ week, 6+ day ago (505+ words) This study addresses the challenge of the mechanical behavior of fractured rock masses in cold regions under freeze–thaw-fatigue coupling. Uniaxial step-incremental cyclic loading tests were conducted on double-cracked red sandstone subjected to different numbers of freeze–thaw cycles to…...
Applied Sciences, Vol. 16, Pages 8507: Mechanical Degradation and Acoustic Emission Characteristics of Sandstone Containing Intersecting Fissures Under Uniaxial Compression
2+ week, 4+ day ago (425+ words) Intersecting fissures strongly affect stress transfer and crack coalescence in rock, but their coupled effects on mechanical degradation and acoustic emission signatures remain incompletely understood. We conducted uniaxial compression tests with synchronous acoustic emission monitoring on prismatic sandstone specimens containing…...
Applied Sciences, Vol. 16, Pages 8420: Multiscale Experimental Characterization and FDEM Integration of Deformation and Failure of Deep Mudstone Under High Temperature and High Pressure
3+ week, 6+ min ago (409+ words) The deformation and failure mechanism of deep mudstone under high temperature and high pressure (HTHP) is a critical issue constraining deep-drilling efficiency. Taking an HTHP mudstone formation in the western South China Sea as the research object, this study integrates…...
Applied Sciences, Vol. 16, Pages 8422: Elastic Impedance Matrix-Based Reflectivity Approximation for Vertically Fractured Shales
3+ week, 6+ min ago (501+ words) Shale is typically studied as a transversely isotropic medium with a vertical axis of symmetry (VTI). This model can be extended to vertical fractures in transversely isotropic (VFTI) media when the shale background contains a set of vertical fractures. The…...
Applied Sciences, Vol. 16, Pages 8363: Mechanism of Fracture Network Propagation and Permeability Evolution in Naturally Fractured Rock Under Pulse Fracturing
3+ week, 2+ day ago (473+ words) Natural fractures dominate fracturing effects and well production. Conventional fracturing fails to fully activate multi-scale fractures, and most simulations adopt homogeneous rock assumptions, lacking systematic analysis on fracture propagation and seepage evolution in heterogeneous fractured formations, while the natural fracture…...