Results 21 to 30 of about 603 (176)

Computing Localized Breakthrough Curves and Velocities of Saline Tracer from Ground Penetrating Radar Monitoring Experiments in Fractured Rock

Energies, 2021
Solute tracer tests are an established method for the characterization of flow and transport processes in fractured rock. Such tests are often monitored with borehole sensors which offer high temporal sampling and signal to noise ratio, but only limited ...
Peter-Lasse Giertzuch, Alexis Shakas, Joseph Doetsch, Bernard Brixel, Mohammadreza Jalali, Hansruedi Maurer   +5 more
doaj   +1 more source

Assessment of Combustion Cavern Geometry in Underground Coal Gasification Process with the Use of Borehole Ground-Penetrating Radar

Energies, 2023
In this study, the shape and size of a combustion cavity with a fracture zone in the gasified coal seam was determined with the use of control boreholes and a ground-penetrating radar (BGPR) test.
Zenon Pilecki, Robert Hildebrandt, Krzysztof Krawiec, Elżbieta Pilecka, Zbigniew Lubosik, Tomasz Łątka   +5 more
doaj   +1 more source

Fault Detection with Crosshole and Reflection Geo-Radar for Underground Mine Safety

Geosciences, 2020
Ground-penetrating radar and crosshole radar are applied in an underground marble mine for fault detection and to test if different geological bodies can be distinguished.
Jakob Kulich, Florian Bleibinhaus
doaj   +1 more source

Research status and direction of ultra-wide band radar technology for borehole rescue

Gong-kuang zidonghua, 2021
In the mine rescue process, the current video and audio based borehole life information identification technology has the problems of video obstacle failure and fast speed of sound wave attenuation.
ZHENG Xuezhao 1,2, SUN Ziyu1,2 , ZHANG Yanni1,2, ZHANG Duo1,2, XU Chengyu1,2   +4 more
doaj   +1 more source

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   +1 more source

3D modeling technology of coal seam in working face and its application in intelligent mining

Meikuang Anquan, 2021
This paper puts forward a three-layer construction framework of the geological model for the working face, and expounds the construction process of the coal seam model of the working face.
LI Peng, CHENG Jianyuan
doaj   +1 more source

Discrete Fracture Network (DFN) Analysis to Quantify the Reliability of Borehole-Derived Volumetric Fracture Intensity

Geosciences, 2023
Volumetric fracture intensity (P32) is a parameter that plays a major role in the mechanical and hydraulic behaviour of rock masses. While methods such as Ground Penetrating Radar (GPR) are available to map the 3D geometrical characteristics of the ...
Pedro Ojeda, Davide Elmo, Steve Rogers, Andres Brzovic   +3 more
doaj   +1 more source

Using borehole radar detecting hydraulic fracturing crack in near horizontal holes in coal mine

Frontiers in Earth Science
Currently, hydraulic fracturing technology is widely implemented for controlling the surrounding rock and enhancing permeability in low-permeability coal seams.
Jiang Bici, Jiang Bici
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

Mechanism of “seesaw‐type” rock burst in coal seam mining beneath mountainous areas

Deep Underground Science and Engineering, EarlyView.
This study reveals the mechanism of “seesaw‐type” rock bursts during coal mining beneath mountainous areas. The advancing working face induces nonuniform fracturing of the overburden. The detached mountain mass then undergoes a seesaw‐type rotational movement around a shifting pivot, driving the primary fracture through a characteristic “open‐close ...
Chao Zhou, Xueqiu He, Zhenlei Li, Ping Wang, Dazhao Song, Fuxing Jiang, Shan Yin, Anliang Lü, Menghan Wei, Taoping Zhong   +9 more
wiley   +1 more source