Results 101 to 110 of about 113,420 (306)

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

Post-depositional formation of vivianite-type minerals alters sediment phosphorus records [PDF]

, 2018
Phosphorus (P) concentrations in sediments are frequently used to reconstruct past environmental conditions in freshwater and marine systems, with high values thought to be indicative of a high biological productivity.
Matthias Egger, Egger, Matthias, General geochemistry, DIjkstra, Nikki, Dijkstra, N., Nikki Dijkstra, Geochemistry, Slomp, C.P., Mathilde Hagens, Caroline P. Slomp, Hagens, M., Hagens, Mathilde, Egger, M.J., Slomp, Caroline P.   +13 more
core   +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

Imaging element distributions within small marine calcifiers: a NanoSIMS perspective

, 2019
Climate change is one of the major challenges of our time. Human induced increase in atmospheric carbon dioxide will, without the effort to decrease carbon emissions world-wide, likely lead to a global mean surface temperature rise exceeding 1.5 °C by ...
General geochemistry, Geochemistry, Roepert, Anne   +2 more
core  

Equitable Access, Open Science, and the Future of Publishing in Geochemistry and Cosmochemistry

The landscape of academic publishing, including in geochemistry and cosmochemistry, is evolving toward greater openness and accessibility. This editorial outlines the vision for Advances in Geochemistry and Cosmochemistry, a diamond open access journal ...
Tartèse, Romain, Advances In Geochemistry And Cosmochemistry Editorial Board, The Inuagural, Klöcking, Marthe, Kiseeva, Ekaterina S., Mallik, Ananya, Fonseca, Raúl O.C., Matthews, Simon W., Tartèse, Romain; id_orcid, Millet, Marc-Alban, Marin-Carbonne, Johanna, Darling, James R., Namur, Olivier, Ickert, Ryan B., Tierney, Jessica E., Pourret, Olivier, Dahrén, Börje, Torres, Mark A., Dahrén, Börje,   +17 more
core   +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

Climate Warming Amplifies the Contribution of High‐Altitude Cold Regions to Global Carbonate Weathering Carbon Sink

Earth's Future
Carbonate weathering carbon‐sink (CWCS) is a critical yet inaccurately quantified component of terrestrial carbon sequestration. However, the mechanisms through which climate change and vegetation dynamics drive the spatial heterogeneity of CWCS remain ...
Junhan Li, Xiaoyong Bai, Chaojun Li, Yue Li, Chen Ran, Sirui Zhang, Lian Xiong, Chaochao Du, Xiaodong Yuan, Jingjing Liao, Yuanhuan Xie   +10 more
doaj   +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

Dynamic tensile strength and fracture evolution of characteristic shale with bedding and hole using linear regression theory

Deep Underground Science and Engineering, EarlyView.
The spiral conical perforations generated during methane in situ explosion fracturing operations lead to tensile fracture propagation in shale reservoirs being governed by the combined effects of impact pressure, bedding, and aperture under explosive loading. Using multiple regression analysis and digital image correlation technology, the mechanisms of
Yabo Chai, Ning Luo, Jianan Zhou, Haohao Zhang, Penglong Li, Yu Wang, Cheng Zhai, Tianran Ma   +7 more
wiley   +1 more source

Semi‐analytical solution for the stability of deep vertical shaft considering time‐dependent rock‐structure interaction

Deep Underground Science and Engineering, EarlyView.
A novel cavity contraction solution and multilayer shaft wall model were developed to analyze deep shaft stability, considering rock viscosity, support structures, and water pressure, with successful validation through a Hulusu Coal Mine case study.
Bin Chen, Pinqiang Mo, Zhao Lu, Lianfei Kuang, Qiang Zhang, Abolfazl Eslami   +5 more
wiley   +1 more source