Results 81 to 90 of about 65,000 (285)

A review on rockburst prediction and prevention to shape an ontology‐based framework for better decision‐making for underground excavations

open access: yesDeep Underground Science and Engineering, EarlyView.
A scientometric analysis of 2449 journal articles and a comprehensive review of 336 papers were conducted, discussing and identifying challenges and research gaps in rockburst prediction and prevention and proposing an ontology‐based framework for better decision‐making in underground excavations. Abstract With underground engineering projects becoming
Hongchuan Yan   +6 more
wiley   +1 more source

Modeling the gravitational potential of a cosmological dark matter halo with stellar streams [PDF]

open access: yes, 2016
Stellar streams result from the tidal disruption of satellites and star clusters as they orbit a host galaxy, and can be very sensitive probes of the gravitational potential of the host system. We select and study narrow stellar streams formed in a Milky-
Hartke, Johanna   +2 more
core   +2 more sources

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

open access: yesDeep 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   +4 more
wiley   +1 more source

Experimental study of mechanical properties of highly-stressed rocks under true triaxial unloading conditions with different unloading directions

open access: yesShuiwen dizhi gongcheng dizhi
During the excavation process of deep rock masses, the surrounding rock stress field forms alternating zones of stress increase (loading zones) and stress decrease (unloading zones) near the excavation surface, which can easily trigger instability and ...
Qian XIANG   +5 more
doaj   +1 more source

Critical expansion points: Mechanical signs of surrounding rock instability

open access: yesDeep 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   +4 more
wiley   +1 more source

Characterization of Asphalt Treated Base Course Material [PDF]

open access: yes, 2010
INE/AUTC 11 ...
Li, Peng, Liu, Juanyu
core  

A rock brittleness index based on the postpeak energy release rate and damage surface characteristics for brittle hard rock

open access: yesDeep Underground Science and Engineering, EarlyView.
This study examines energy evolution in rock rupture via triaxial direct shear tests, exploring the impact of confining pressure and temperature on fracture surface randomness. A novel energy‐based brittleness index is proposed, validated experimentally, and compared with existing methods for reliability and accuracy.
Biao Wang   +5 more
wiley   +1 more source

Research on large-scale triaxial tests of TDA-modified ballast with different shapes

open access: yesYantu gongcheng xuebao
Ballast mixed with tire-derived aggregate (TDA) is a novel method for improving the track bed, which has advantages of promoting performance of ballasted track infrastructure and enhancing the utilization rate of solid waste.
CHANG Jianmei 1, CHEN Gaoming 1, WANG Ai 1, FENG Huaiping 1, CUI Ying 2
doaj   +1 more source

Stiffness moduli in triaxial tests on a loess-sand mixture [PDF]

open access: yesE3S Web of Conferences
Stiffness is one of the most important characteristics of geomaterials, and at the same time one of the most difficult to evaluate. It can be described by means of various stress-strain moduli, whose values strongly depend on the strain range and on the ...
Tankiewicz Matylda, Kowalska Magdalena
doaj   +1 more source

Design of Triaxial Tests with Polymer Matrix Composites. [PDF]

open access: yesPolymers (Basel), 2022
Serna Moreno MDC   +2 more
europepmc   +1 more source

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