2+ week, 5+ day ago   (477+ words) Frictional energy piles are a more desirable form of shallow geothermal energy utilization. A pure friction pile condition cannot be achieved in field tests. In this study, foam was placed beneath the model pile tip to weaken the end-bearing resistance....

3+ week, 2+ day ago   (323+ words) Solving the shallow-water equations (SWEs) using the lattice Boltzmann method (LBM) can be computationally expensive on uniform grids. Here we develop a quadtree-based adaptive mesh refinement framework that preserves the Cartesian grid structure while enabling local refinement. A cell-centred data…...

3+ week, 19+ hour ago   (501+ words) Rock cohesion (c) and angle of internal friction (φ) are core parameters for rock mass stability analysis and engineering design; however, traditional triaxial tests are costly and time-consuming, limiting their availability in preliminary engineering assessments. To address this limitation, this study…...

2+ day, 12+ hour ago   (412+ words) Since pioneering fluid-flow models for the Iberian and French Variscan belt, advances in geochronology, thermochronology, and geodynamic modeling have improved our understanding of late Variscan crustal evolution. New datasets suggest tungsten and gold mineralization do not represent distinct metallogenic events,…...

4+ week, 20+ hour ago   (569+ words) To elucidate the structural evolution of fracture networks around gas drainage boreholes and their controlling mechanisms on grouting sealing performance, a coal seam in the Zhongmacun Mine (No. 2-1 coal seam) was selected as the engineering background. An integrated approach combining…...

2+ week, 3+ 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…...