Results 31 to 40 of about 1,538 (216)

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

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

Rock mechanical properties under reconstructed deep in situ thermo–hydro–mechanical conditions: Implications for CO₂‐related injection scenarios

Deep Underground Science and Engineering, EarlyView.
The graphical abstract illustrates a reconstructed in situ thermo‐hydro‐mechanical (THM) framework in which porosity serves as the central variable linking stress, pore pressure, and temperature to evolving mechanical properties of rocks. Under burial conditions, in situ stress, pore pressure, and temperature jointly govern volumetric strain and ...
Mingyuan Lu, Jun Wang, Zixiong Qi, Ruixuan Chen, Hongtao Wang, Hongwei Zhou   +5 more
wiley   +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

Spatial Variability of Permafrost and Active Layer Thickness in a Forested Hillslope of the Taiga Shield

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Under continued climate warming, understanding present‐day permafrost distribution and the controls on ground thaw are critical for predicting permafrost thaw trajectories and associated implications. This study presents a high‐resolution investigation of permafrost extent and active layer thickness (ALT) across a coniferous forested hillslope
Alana Muenchrath, Christopher Spence, Andrew Ireson   +2 more
wiley   +1 more source

Mapping coal seam roof and floor by using in-seam borehole radar: Results from numerical modelling

, 2021
Longwall automation depends on the development of automatic coal seam (horizon) tracking and lateral guidance systems to keep mining the target coal seam while steering to the desired target.
Iain Mason, Binzhong Zhou, Jianjian Huo, Matthew van de Werken   +3 more
core   +1 more source

Deciphering Freeze–Thaw Dynamics In Rockwalls: A Novel Approach for High Accuracy Regional‐Scale Modeling

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT Using a large and novel array of instruments on five rockwalls in northern Gaspesia, their respective surface energy balances were calculated and their thermal regimes were measured and modeled to depths exceeding the seasonal frost penetration.
Tom Birien, Francis Gauthier
wiley   +1 more source

“Cold Tropics”: Permafrost Existence and Thickness on Eastern Nevado Coropuna (Southern Peruvian Andes) Revealed by Ground‐Penetrating Radar and Geoelectrical Soundings

Permafrost and Periglacial Processes, EarlyView.
ABSTRACT The existence of permafrost was explored at tropical latitude on Nevado Coropuna (southern Peruvian Andes) using a combination of ground‐penetrating radar (GPR) and vertical electrical sounding (VES) in order to strengthen the mutual validation of data processing and interpretation.
Velnia Chacca, Ramón Pellitero, Adriano Ribolini, José Úbeda, Luis Mariano del Río, Ricardo Vila, Oscar Vilca   +6 more
wiley   +1 more source

Key technologies of borehole comprehensive geophysical prospecting for advanced detection in directional long drilling of rapid excavation working face

Meitan kexue jishu
The efficient and intelligent production in coal mining necessitates more precise detection of hidden underground disaster-causing factors. Rapid excavation faces challenges in the accuracy and efficiency of detecting coal-rock interfaces, geological ...
Ping LI, Rong WEI, Tao FAN, Rui ZHAO, Bici JIANG, Xiaochao TIAN   +5 more
doaj   +1 more source