Results 91 to 100 of about 81,970 (281)

Blasting effects of cross‐fault deep‐buried excavation on adjacent existing tunnel stability

Deep Underground Science and Engineering, EarlyView.
Based on the theoretical analysis of cylindrical wave propagation in a deep rock mass in the fault with a filling layer, the calculation method of peak particle velocity caused by wave propagation in the existing tunnel is established. The viscoelastic characteristics of a rock mass are examined in the analysis.
Shaobo Chai, Lianzeng Chai, Chao Meng, Kai Liu, Lang Song, Shaojie Zheng   +5 more
wiley   +1 more source

Geology and engineering properties of sensitive Boston Blue Clay at Newbury, Massachusetts

AIMS Geosciences, 2019
This paper describes the geology and geotechnical engineering properties of a sensitive marine clay deposit at a research site located in Newbury, Massachusetts (MA) in the northeast USA.
Don J. DeGroot, Melissa E. Landon, Steven E. Poirier   +2 more
doaj   +1 more source

Anthropogenic Renourishment Feedback on Shorebirds: a Multispecies Bayesian Perspective [PDF]

, 2011
In this paper the realized niche of the Snowy Plover (Charadrius alexandrinus), a primarily resident Florida shorebird, is described as a function of the scenopoetic and bionomic variables at the nest-, landscape-, and regional-scale.
Gregory Kiker, Igor Linkov, Joseph Donoghue, Ma Librada Chu-Agor, Matteo Convertino, Rafael Munoz-Carpena, Richard Fischer   +6 more
core   +1 more source

Failure mechanism of the coal wall at the working face based on an eccentric compression mechanical model

Deep Underground Science and Engineering, EarlyView.
In this study, the nonuniform distribution of the bearing pressure in front of the coal wall has been revealed based on in situ monitoring data and numerical simulation results. Therefore, an eccentric compression mechanical model of the coal wall was established to study the deformation and failure characteristics of a coal wall. The slenderness ratio
Maolin Tian, Jiabao Wang, Changsheng Wang, Shijie Sun, Lijun Han, Qingbin Meng, Sunhao Zhang   +6 more
wiley   +1 more source

Stress analysis of crack characteristic of anthracite under dynamic loading

Deep Underground Science and Engineering, EarlyView.
In this article, the dynamic compression test of anthracite under five strain rates is carried out, the evolution law of three kinds of crack characteristic stress is analyzed, and a prediction model of the crack characteristic stress threshold considering the strain rate effect is established. Then, the rationality of crack characteristic stress under
Yun Bai, Feng Gao, Ning Luo, Zhizhen Zhang, Yue Niu, Shanjie Su   +5 more
wiley   +1 more source

Hydrological phase-driven management in semi-arid watersheds: Linking plankton assembly dynamics and adaptive resilience strategies

Water Research X
Semi-arid river basins, characterized by pronounced hydrological seasonality and anthropogenic pressures, face escalating threats to aquatic ecosystems under climate change. This study investigated the Dahei River Basin, a critical Yellow River tributary
Jingzhi Yu, Guoqiang Wang, Yinglan A, Yi Zhu, Yan Cheng, Zhimao Deng, Ruizhong Gao, Limin Duan   +7 more
doaj   +1 more source

Stratigraphy and chronology of a 15ka sequence of multi-sourced silicic tephras in a montane peat bog, eastern North Island, New Zealand. [PDF]

, 1999
We document the stratigraphy, composition, and chronology of a succession of 16 distal, silicic tephra layers interbedded with lateglacial and Holocene peats and muds up to c. 15 000 radiocarbon years (c.
Lowe, David J., Newnham, Rewi M., Ward, Chris M.   +2 more
core   +2 more sources

Slit tube responses and rock fracture characteristics in slit charge blasting under high in situ stress

Deep Underground Science and Engineering, EarlyView.
In this article, the finite element method‐smoothed particle hydrodynamics adaptive coupling algorithm is applied to numerically simulate and analyze the dynamic response of the slit tube and the crack propagation under high in situ stress. The dynamic response of the slit tube mainly exhibits radial response in the vertical direction of the slit and ...
Zhe Sui, Liyun Yang, Lijun Wu, Chenxi Ding   +3 more
wiley   +1 more source

The use of diatom records to establish reference conditions for UK lakes subject to eutrophication [PDF]

, 2011
A knowledge of pre-disturbance conditions is important for setting realistic restoration targets for lakes. For European waters this is now a requirement of the European Council Water Framework Directive where ecological status must be assessed based on ...
Bennion, H, Simpson, GL
core  

Design, Implementation, and Assessment of an Undergraduate Interdisciplinary Watershed Research Laboratory [PDF]

, 2002
This article discusses the establishment of Shippensburg University's Burd Run Interdisciplinary Watershed Research Laboratory and the advantages of linking disciplinary perspectives across courses in geology, geography, biology, and teacher education ...
Christopher Woltemade, William Blewett
core   +1 more source