Results 241 to 250 of about 268,148 (308)

Study on fracture parameter calibration and failure characteristics of rock with hole and crack

Deep Underground Science and Engineering, EarlyView.
The SIF and plastic zone equations for a single hole and crack have been derived. The model's failure state leads to the identification of four types of cracks. The plastic zone increases with increased brittleness and decreased crack length. Abstract Cracks within the surrounding rock of roadways significantly affect their stability and failure ...
Shaochi Peng, Wensong Wang
wiley   +1 more source

Comprehensive analysis of the influence of loess structure on strength on the Loess Plateau, China. [PDF]

PLoS One
Cheng H, Li H, Jiao S, He Y, Deng J, Wei H, Song Y, Xu R.   +7 more
europepmc   +1 more source

Review and prospects of shear test of bolted rock joints

Deep Underground Science and Engineering, EarlyView.
The laboratory shear test equipment, test method, and numerical simulation of bolted rock joints were summarized. The shortcomings and limitations of the current research were analyzed, and the research prospects were proposed. Abstract Rock bolting is a critical approach in geotechnical engineering for supporting weak rocks.
Shulin Ren, Fan Yang, Manchao He, Yong Yuan, Zhigang Tao   +4 more
wiley   +1 more source

Jurassic constraints on the chaotic Mars-Earth eccentricity cycle linked to the volcanically induced Jenkyns event. [PDF]

Proc Natl Acad Sci U S A
Fang Y, Olsen PE, Sha J, Whiteside JH, Guan C, Ikeda M, Li S, Zheng D, Zhang H, Wang B.   +9 more
europepmc   +1 more source

Temperature‐dependent shear behavior and constitutive model of the rock–concrete interface

Deep Underground Science and Engineering, EarlyView.
Shear tests were conducted to investigate the temperature‐dependent shear behavior of the rock–concrete interface, highlighting the interaction between the surrounding rock and the lining during tunnel fires. Under experimental conditions, concrete exhibited greater temperature sensitivity than rock, with the shear fracture surface transitioning from ...
Hongbin Chen, Yujing Jiang, Rui Pan, Bin Wang, Sunhao Zhang, Jinge Zhang, Xianzhuang Ma   +6 more
wiley   +1 more source

Onset of persistent surface ocean oxygenation during the Great Oxidation Event. [PDF]

Nat Commun
Heard AW, Ostrander CM, Shu Y, Bekker A, Poulton SW, Nielsen SG.   +5 more
europepmc   +1 more source

Basal mantle structure regenerated through supercontinents. [PDF]

Nat Commun
Peng P, Mitchell RN, Zhang N, Su X, Li Y, Sun F, Wang C, Guo J, Zhai M.   +8 more
europepmc   +1 more source

The Powfoot Boulder Pavement [PDF]

, 2010
Brookfield, Michael, McMillan, Andrew, Merritt, Jon   +2 more
core  

Marine phosphorus and atmospheric oxygen were coupled during the Great Oxidation Event. [PDF]

Nat Commun
Dodd MS, Li C, Gu H, Zhang Z, Hou M, Sadekov A, Rosière CA, Pirajno F, Alcott L, Ossa FO, Mills BJW, Bekker A.   +11 more
europepmc   +1 more source