Results 231 to 240 of about 19,231,090 (300)

Litho-structural mapping using remote sensing, petrographic characterization, and SEM/EDX mineralization analysis: insights from the Arabian-Nubian Shield. [PDF]

Sci Rep
El-Awny H, Abdel-Rahman AM, Abd El-Wahed MA, Hamed HG, Fahmy W, El-Sherif A, Csámer Á, Shebl A.   +7 more
europepmc   +1 more source

Critical expansion points: Mechanical signs of surrounding rock instability

Deep Underground Science and Engineering, EarlyView.
This study proposes the Rock Bearing‐Expansion Model (RockBEM) with critical expansion points (CEPs) to quantify post‐peak damage stages in deep‐buried rock masses via plane strain compression test (PSCT). CEP hysteresis&interval ratios reveal bearing performance dynamics and failure severity, advancing mechanistic insights into deep underground rock ...
Jiaqi Wen, Chang Deng, Haijun Wang, Lei Tang, Jihong Yu   +4 more
wiley   +1 more source

Multiscale Pore Architecture and Fractal Heterogeneity of Coal, Shale, and Tight Sandstone: An Integrated HMIP-N₂/CO₂ Adsorption-NMR Characterization Framework. [PDF]

ACS Omega
Xiang J, Li J, Li X, Ma X, Zou Z, Sun J.
europepmc   +1 more source

Exploring wave propagation behaviors in rock: A grain‐based perspective on mineral structures

Deep Underground Science and Engineering, EarlyView.
This study investigates wave propagation in rock at the grain scale using a grain‐based model, revealing that mineral elastic modulus significantly influences wave attenuation while grain size and distribution have limited effects. A novel peak particle velocity attenuation prediction model is proposed and validated for grain‐scale wave propagation ...
Zhiyi Liao, Jiachen Xu, Kai Zhang, Changtai Zhou   +3 more
wiley   +1 more source

Genesis mechanisms of medium- and low- temperature convective geothermal fields in Wenquan County, Xinjiang. [PDF]

PLoS One
Sun C, Qi Z, Zhang Z, Chen K, Xi Y, Wang Y, Zhao M.   +6 more
europepmc   +1 more source

An optimizing microseismic method for rock burst early warning based on mining production process

Deep Underground Science and Engineering, EarlyView.
A classification early warning method of rock burst based on hourly microseismic data is proposed, which can be combined with the on‐site production process to provide more timely warning. Abstract Microseismic (MS) events have been reported in nearly every coal mining country, which could well lead to rock burst in underground coal mines.
Zepeng Han, Linming Dou, Wu Cai, Mingbo Chi, Guojun Xi, Shuai Chen, Biao Jiao   +6 more
wiley   +1 more source

Three-dimensional spatial representation method for semantic boundaries in digital outcrop models. [PDF]

Sci Rep
Dong Z, Zhang H, Qu Y, Yang S, Yang H, Tang P.   +5 more
europepmc   +1 more source

Motion planning and control of an installation robot for attitude adjustment of arc parts in underground shield tunneling

Deep Underground Science and Engineering, EarlyView.
Inspired by spiders, the multilegged walk‐through assembling robot for arc parts achieves high‐precision synchronous control under heavy loads through dual‐layer hydraulic pose dynamics modeling and hierarchical pressure optimization, significantly enhancing shield tunneling assembly efficiency and precision.
Quan Xiao, Guofei Xiang, Liang Liao, Lai Wei, Hongli Wang, Songyi Dian   +5 more
wiley   +1 more source

Inversion analysis of the stress field in a pumped-storage power station based on the PSO-XGBoost and the finite element model. [PDF]

Sci Rep
Wang J, Yao R, Li B, Zhang C.
europepmc   +1 more source

Study on the composite fracture characteristics of filling and reinforcing cracked rock mass after high temperature damage

Deep Underground Science and Engineering, EarlyView.
Cement infill shares compressive and shear stresses during loading, while interfacial friction hinders crack propagation and reduces stress concentration, improving the rock's load‐bearing capacity. Failure modes vary with crack inclination. Unfilled specimens show four modes.
Shihao Yuan, Qiang Sun, Jianjun Hu, Liwei Zhang, Jishi Geng   +4 more
wiley   +1 more source