Results 91 to 100 of about 2,942,494 (296)

Investigation on the mechanical behavior of the multiple‐layered lining structure of a water conveyance tunnel with high internal water pressure

Deep Underground Science and Engineering, EarlyView.
This study presents large‐scale similarity model testing (geometric ratio 3.6) of an innovative multiple‐layered lining system—comprising exterior precast segments, middle self‐compacting concrete, and an interior steel pipe—for high‐pressure (0.75 MPa) water conveyance tunnels.
Ramin Asadi, Shimin Wang, Chang Liu, Zhiyu Lin, Chuan He   +4 more
wiley   +1 more source

Analysis of the synchronous rise of water level in the Tangshan fault zone

Scientific Reports
Since 2019, a synchronous and abnormal upward trend in water levels has been observed in the Tangshan and Majiagou observation wells, located within the Tangshan fault zone, coinciding with three earthquakes of magnitude 4.0 or higher in the Tangshan ...
Jie Tang, Suxin Zhang, Dong Ma, Yan Wang, Lina Sun, Wenlou Luan   +5 more
doaj   +1 more source

Development of KJ699 micro-seismic monitoring system based on multi-substatio

Gong-kuang zidonghua, 2015
For monitoring range limitation of current single-substation micro-seismic monitoring system, a KJ699 micro-seismic monitoring system based on multi-substation was developed.
ZHU Shangsong
doaj   +1 more source

Energy evolution‐based damage quantification and failure prediction of fault zone tunnel lining concrete: A novel acoustic emission–strain energy coupling approach

Deep Underground Science and Engineering, EarlyView.
This study investigates the damage evolution and failure mechanisms of tunnel lining concrete in active fault zones through uniaxial compression tests integrated with acoustic emission (AE) monitoring. A strong linear correlation is identified between the AE cumulative absolute energy and the total strain energy, providing a reliable energy‐based ...
Shuaida Zhu, Dongming Zhang, Mingliang Zhou, Shengjun Duo, Hongwei Huang   +4 more
wiley   +1 more source

Research on orbit prediction based on multi-source satellite orbit characteristics and multi-head attention mechanism-LSTM model

Array
High-precision orbit prediction is critical for stable navigation system operation and space safety. To address the limitation of existing data-driven approaches that rely on single-satellite historical data and fail to fully exploit shared information ...
Qingshan Luo, Jiahao Ji, Yurui Xu, Tao Yang, Liangliang Xu   +4 more
doaj   +1 more source

Reusing depleted oil and gas wells for geothermal energy: Feasibility, challenges, and a decision‐making framework for sustainable conversion

Deep Underground Science and Engineering, EarlyView.
The graphical abstract presents a structured decision‐support framework for assessing the feasibility of converting depleted oil and gas wells into geothermal energy systems. The left panel illustrates a comprehensive, multi‐stage decision‐making framework progressing from prefeasibility screening and technical–economic analysis to policy alignment ...
Karolina Bieryt, Yu Pan, Heinz Konietzky, Fei Wang   +3 more
wiley   +1 more source

Need for an adequate seismic monitoring of seismically isolated buildings to ensure safety during their life

, 2015
To check the benefits of anti-seismic (AS) devices in terms of reduction of the seismic response of structures, adequate seismic monitoring (SM) systems should be widely installed. This applies especially to the structures protected by seismic isolation (
Clemente, P.
core   +1 more source

Borehole seismic methods for opencast coal exploration [PDF]

, 1990
Surface seismic techniques lack the resolution to image the top 100m or so of the earth's surface necessary for opencast coal exploration. The work reported in this thesis is the development of borehole seismic methods making use of the closely spaced ...
Kragh, J. Edward
core  

Dynamic prediction of coal and gas outburst risk based on quantitative analysis of stress–energy evolution and adaptive correction

Deep Underground Science and Engineering, EarlyView.
This study quantitatively analyzed the spatiotemporal evolution of stress redistribution ahead of the working face by integrating coal seam distribution, tectonic stress anomalies, gas pressure, and mining‐induced disturbances. An R‐value criterion for coal and gas outburst (CGO) risk assessment was established based on energy principles.
Yingjie Zhao, Xueqiu He, Dazhao Song, Liming Qiu, Minggong Guo, Jie Liu, Qiang Liu, Yi Zhu   +7 more
wiley   +1 more source

A new technology for estimating time shifts in seismic monitoring of the exploitation of oil and gas fields and underground gas storage sites

Геофизический журнал, 2018
The process of exploitation of oil and gas fields and underground natural gas and CO2 storage facilities is accompanied by time-dependent changes in the physical properties of both the reservoir itself and the overburden.
Yu. K. Tyapkin, O. Yu. Tiapkina
doaj   +1 more source