Results 1 to 10 of about 125 (104)

3D Imaging Algorithm of Directional Borehole Radar Based on Root-MUSIC [PDF]

Remote Sensing, 2021
A directional borehole radar consists of one transmitting antenna in the borehole and four receiving antennas distributed at equal angles in a ring. The receiving antennas can determine the depth and orientation of targets beside the borehole.
Wentian Wang, Sixin Liu, Xuzhang Shen, Wenjun Zheng   +3 more
doaj   +4 more sources

Analysis of the Borehole Effect in Borehole Radar Detection [PDF]

Sensors, 2020
The directional borehole radar can accurately locate and image the geological target around the borehole, which overcomes the shortcomings that the conventional borehole radar can only detect the depth of the target and the distance from the borehole ...
Wentian Wang, Sixin Liu, Xuzhang Shen, Wenjun Zheng   +3 more
doaj   +4 more sources

Numerical Simulation Study on the Impact of Blind Zones in Ground Penetrating Radar [PDF]

Sensors
Ground-penetrating radar (GPR) is an effective geophysical method for rapid and non-destructive detection. Directional borehole radar is the application of GPR in a borehole, which can determine the depth, orientation, and distance of the target from the
Wentian Wang, Wei Du, Siyuan Cheng, Jia Zhuo   +3 more
doaj   +2 more sources

Research on directional detection technology of mine borehole radar

矿业科学学报
To address the problem that conventional borehole radar has difficulties in performing directional detection of surrounding targets due to the effects of radar wave propagation characteristics and complex geological conditions in mines, research on ...
XU Xianlei, ZHU Xiaosong, LI Taotao, LIU Fangyi, LIANG Peng   +4 more
doaj   +2 more sources

Consideration of Oblique Incidence in 3-D Imaging of a Planar Interface With a Circular Dipole Array in an Air-Filled Borehole

IEEE Journal of Selected Topics in Applied Earth Observations and Remote Sensing, 2020
We consider the effects of oblique incidence of a wave on the creation of a 3-D image of a planar interface with an array-type directional borehole radar. In this study, we focus on the situation where the radar probe is close to the planar interface. In
Satoshi Ebihara, Shyuhei Kotani, Kengo Fujiwara, Yuta Kimura, Takaaki Shimomura, Ryota Uchimura   +5 more
doaj   +1 more source

Analysis of coal thickness identification and imaging accuracy of mine directional borehole radar

Meitan xuebao
The geological structure of coal mines in China is complex, and precise detection of coal seam thickness and orientation is crucial for intelligent and safe mining operations.
Xianlei XU, Jinglin LI, Shilong CAO, Haoran ZHANG, Zhenghan YUAN   +4 more
doaj   +1 more source

Application of long-distance tunneling and detection for advance detection in excavation using shield tunneling machines

Meitian dizhi yu kantan
Objective and MethodDuring the rapid excavation process using shield tunneling machines in coal mines, the advance detection of concealed geological anomalies encounters challenges of limited space and insufficient accuracy.
Chao CHEN, Ping LI, Wei LI, Rong WEI
doaj   +1 more source

Research on an Automatic Detection Method for Response Keypoints of Three-Dimensional Targets in Directional Borehole Radar Profiles

Remote Sensing
During the interpretation of Borehole Radar (BHR) B-scan profiles, the accurate determination of the azimuth of geological targets in three-dimensional space is a critical issue for achieving precise anomaly localization and spatial structure inversion ...
Xiaosong Tang, Maoxuan Xu, Feng Yang, Jialin Liu, Suping Peng, Xu Qiao   +5 more
doaj   +1 more source

Technical advances and research directions of borehole geophysical prospecting for coal mines

Meitian dizhi yu kantan
BackgroundHigh-precision and long-distance exploration of geological conditions is required for coal extraction and disaster prevention in coal mines. However, traditional drilling and geophysical prospecting methods face technical bottlenecks such as ...
Jianyuan CHENG, Yu YAN, Yuteng LI, Pan WANG, Rui ZHAO, Bici JIANG   +5 more
doaj   +1 more source

Effect of the Outer Pipe on Reducing Direct Coupling of the Thin Borehole Radar Probe in Thick Water-Filled Borehole

Remote Sensing
We propose an outer pipe to reduce a direct wave in a thin single-hole borehole radar probe in a thick water-filled borehole. The outer pipe replaces the medium, such as water inside the borehole, with low-permittivity materials, such as air and plastics.
Satoshi Ebihara, Raiki Masui, Koki Koyama, Yuki Tsujikawa, Yuto Nishida   +4 more
doaj   +1 more source