Results 81 to 90 of about 284 (138)

A research on three-dimensional response features of borehole electromagnetic method [PDF]

, 2013
The borehole transient electromagnetic (BHTEM) is a promising exploration tool for searching deep deposits. To increase the effectiveness of fieldwork, we studied the main features of responses BHTEM and quantified the change in BHTEM responses according
Dai, Xueping
core  

A method for advance detection of underground concealed water hazards in coal mines based on borehole transient electromagnetic method and vector synthesis

Meitian dizhi yu kantan
BackgroundThe advance detection of underground concealed water hazards in coal mines is crucial to ensuring the safe and efficient roadway tunneling. The borehole transient electromagnetic (TEM) method allows for long-distance advance detection. However,
Tao FAN, Yue HAO, Ping LI, Rui ZHAO, Zaibin LIU, Liang MA, Peng LI, Junsheng YAN   +7 more
doaj   +1 more source

Robust conductance estimates from spatial and temporal derivatives of borehole electromagnetic data

, 2014
This paper is © 2019 Society of Exploration Geophysicists. The posting is available free of charge and its use is subject to the SEG terms and conditions: https://seg.org/Terms-of-UseThe conductance of an infinite uniformly conductive thin sheet can be ...
Kolaj, M., Smith, Richard S.
core   +1 more source

Field experiment on hydraulic channel sealing via grouting to prevent groundwater pollution in karst region

Carsologica Sinica
The karst regions in Southwest China are characterized by intense karstification, complex hydrogeological conditions, and well-developed karst conduits with pronounced spatial heterogeneity. These factors contribute to the inherent vulnerability of karst
Zhihao JI, Shiwan CHEN, Jiaoji WU, Huiyun YU, Pan WU, Lanjian MA   +5 more
doaj   +1 more source

A Study of Improved Inversion Algorithms for Surface–Borehole Transient Electromagnetic Data Based on BFGS Method

Minerals
The surface–borehole transient electromagnetic method (TEM) employs surface-based transmission and downhole reception to collect electromagnetic data. This configuration offers distinct advantages over traditional TEM approaches by effectively attenuating surface electromagnetic noise and cultural interference, leading to enhanced signal strength and ...
Haojin Li, Yurong Mao, Liangjun Yan, Lei Zhou, Xingbing Xie   +4 more
openaire   +1 more source

The transient electromagnetic (TEM) method reveals the role of tectonic faults in seawater intrusion at Zhoushan islands (Hangzhou Bay, China)

International audienceSeawater intrusion into onshore aquifers represents a significant environmental threat worldwide especially in this new era of climate change and sea water rise.
Wang, Wei, Sun, Huaifeng, Revil, André, Li, Guangchang, Chen, Mei, Pang, Yonghao, Zhu, Zhongmin, Shan, Zhigang   +7 more
core   +1 more source

Gauss-Newton inversion of ground transient electromagnetic data using COMSOL multiphysics

Scientific Reports
This study presents a Gauss-Newton inversion framework for Transient Electromagnetic (TEM) data based on the finite element software COMSOL Multiphysics.
Fan Li, Peng Wang, Kai Lu
doaj   +1 more source

Transparent prevention and control system for water hazards in mine floors under empowerment based on spatiotemporal information fusion

Meitian dizhi yu kantan
BackgroundWater hazards in coal mines frequently cause heavy casualties, severely affecting the safe mining of coal mines. MethodsWith the continuous advancements in both the construction of real scene 3D views and coal mine intelligentization, this ...
Zaibin LIU, Junsheng YAN, Jianghong WANG, Yaoquan GAO, Hui YANG, Baojun BAI, Jingjin LU, Hongwei WANG, Gang WANG   +8 more
doaj   +1 more source

Inference of lithologic distributions in an alluvial aquifer using airborne transient electromagnetic surveys

, 2010
An airborne transient electromagnetic (TEM) survey was completed in the Upper San Pedro Basin in southeastern Arizona to map resistivity distributions within the alluvial aquifer. This investigation evaluated the utility of 1D vertical resistivity models
D. R. Pool, R. W. Groom, L. J. Davis, Jesse E. Dickinson   +3 more
core   +1 more source

River sediment salt-load detection using a water-borne transient electromagnetic system

, 2005
Copyright © 2005 Elsevier B.V. All rights reserved.The salinisation of major river systems in Australia, and in other countries, is primarily determined by the upward movement of saline water from regional aquifers into the river.
Hatch, M., Heinson, G., Barrett, B., Telfer, A.   +3 more
core   +1 more source