Results 181 to 190 of about 108,952 (299)

Deep tree roots at risk of accelerating groundwater pollution beneath clay-rich aquitards. [PDF]

Nat Commun
Jørgensen PR, Mosthaf K, Krogh PH, Hansen AJ, Nielsen IB, Seersholm F, Wagner ND, Olsen J, Qin J, Modesti L, Aamand J, Pétursdóttir U, Thalund-Hansen R, Petersen CT, Strobel BW, Lacoste M, Rolle M.   +16 more
europepmc   +1 more source

Permeability of granite from a shallow buried mountain pipe gallery tunnel under unloading confining pressure

Deep Underground Science and Engineering, EarlyView.
Triaxial compression tests under unloading confining pressure conditions were conducted to systematically analyze the permeability behavior of granite retrieved from the different classification surrounding rocks. Abstract The rock mass within mountain tunnels undergoes complex changes in permeability, strength, and deformation during tunneling ...
Xiaoyan Zhang, Yonghua Ye, Jianping Zuo, Baojiang Han, Weigang Jiao   +4 more
wiley   +1 more source

Zuun Baruun Kherem, a medieval Eurasian center in Eastern Mongolia. [PDF]

Asian Archaeol
Wright J, Pursey L, Pleuger-Dreibrodt S, Misterkiewicz A, Byambatsuren B, Green EJ.   +5 more
europepmc   +1 more source

The damage and failure mechanism of prestatically loaded rock during medium‐strain rate cyclic impact loading

Deep Underground Science and Engineering, EarlyView.
Based on experimental results and theoretical analysis, an established rock damage accumulation model that comprehensively considers the preapplied static load, impact peak value, impact frequency, and impact times. Abstract To study the rock damage mechanism under high static loading and superimposed medium strain rate cyclic impact loading, a series ...
Wei Wang, Hanpeng Wang, Zicheng Wang, Xinyuan Xie, Yunhao Wu, Jinhou Zhang, Dekang Sun   +6 more
wiley   +1 more source

Deformation Prediction of Metro Deep Excavations Using CEEMDAN-IWT Denoising and BO-XGBoost. [PDF]

Sensors (Basel)
Zhao J, Chen L, Yang H, Hu Z, Peng H, Yang L, Cao H.   +6 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

Application analysis of soil nail and cable support in deep excavations of loess regions under complex environmental conditions. [PDF]

Sci Rep
Zhang X, Zheng S, Liu L, Liu X.
europepmc   +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

A Late Pleistocene archaic human tooth from Gua Dagang (Trader's Cave), Niah national park, Sarawak (Malaysia). [PDF]

PLoS One
Curnoe D, Sauffi MS, Goh HM, Sun XF, Peiris R.   +4 more
europepmc   +1 more source

Caving‐enhanced geothermal system overwhelms fracturing‐ and pipe‐enhanced geothermal system in heat extraction

Deep Underground Science and Engineering, EarlyView.
Our study reveals that caving‐enhanced geothermal systems (C‐EGS) with adequately fractured reservoirs achieve optimal heat extraction by minimizing preferential flow paths, while conventional fracturing (F‐EGS) and pipe‐based (P‐EGS) systems suffer accelerated thermal drawdown.
Fangchao Kang, Tianjiao Li, Yingchun Li, Jinlong Men, Chun'an Tang   +4 more
wiley   +1 more source