Results 261 to 270 of about 361,466 (347)

Optimization of the single-side drift method for shallow-buried tunnels under large eccentric pressure based on the BiDoseResp settlement model. [PDF]

Sci Rep
Sun R, Gao B, Gan C, Zhu J, Cai D, Yi L.
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

Obstacle-avoidance trajectory planning method for excavators in confined spaces based on improved RRT* algorithm. [PDF]

Sci Rep
Fu S, Lin C, Yao Z, Lin T, Chen Q.
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

Mechanical behavior of Port Basin Bulkheads Reinforced with novel multi-anchored sheet piles. [PDF]

PLoS One
Gao J, Li X, Zhu Y, Jiang J, Tian S, Kang B.   +5 more
europepmc   +1 more source

Assessment of radiation levels in soil obtained from Ottamiri and Nworie River Excavation sites and their impacts on construction projects in Owerri Metropolis, Imo State, Nigeria

George Nkeiru Nzenwa, Ketachukwu Bierechi Okeaoma, Anthony Ohajianye   +2 more
openalex   +2 more sources

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

Evidence from Buhais Rockshelter for human settlement in Arabia between 60,000 and 16,000 years ago. [PDF]

Nat Commun
Bretzke K, Kim S, Jasim SA, Yousif E, Preusser F, Preston GW, Pallottino F, Parker AG.   +7 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

The deformation characteristics and the prefabricated crack pressure relief stability control of a small coal pillar roadway under stress superposition. [PDF]

Sci Rep
Cheng S, Ma Z, Li Y, Zhang X.
europepmc   +1 more source