Visual Performance for Incandescent and Solid-State Cap Lamps in an Underground Mining Environment

2007 ◽  
Author(s):  
John J. Sammarco ◽  
Timothy Lutz
Keyword(s):  
Solid State ◽  
Underground Mining ◽  
Visual Performance ◽  
Mining Environment

MEASUREMENT OF THE EQUILIBRIUM FACTOR BETWEEN RADON AND ITS PROGENY IN THE UNDERGROUND MINING ENVIRONMENT

2004 ◽  
Vol 86 (4) ◽  
pp. 374-377 ◽  
Author(s):  
O. M. Ntwaeaborwa ◽  
N. D. Kgwadi ◽  
S. H. Taole ◽  
R. Strydom
Keyword(s):  
Underground Mining ◽  
Equilibrium Factor ◽  
Mining Environment

scholarly journals The medical perspective on mining incidents

2019 ◽  
Vol 8 (3) ◽  
pp. 236-246 ◽  
Author(s):  
Sofia Karlsson ◽  
Britt-Inger Saveman ◽  
Lina Gyllencreutz
Keyword(s):  
Underground Mining ◽  
Qualitative Content Analysis ◽  
Prehospital Care ◽  
Extreme Environment ◽  
Structured Interview ◽  
Underground Mines ◽  
Major Incident ◽  
Content Type ◽  
Rescue Service ◽  
Mining Environment

Purpose The purpose of this paper is to examine emergency medical service (EMS) personnel’s perceptions and experiences of managing underground mining injury incidents. Design/methodology/approach In total, 13 EMS personnel were interviewed according to a semi-structured interview guide. The interviews were transcribed verbatim and analyzed using qualitative content analysis. Findings An underground mining environment was described as unfamiliar and unsafe and, with no guidelines for operational actions in an extreme environment, such as underground mines, the EMS personnel were uncertain of their role. They therefore became passive and relied on the rescue service and mining company during a major incident. However, the medical care was not considered to be different from any other prehospital care, although a mining environment would make the situation more difficult and it would take longer for the mine workers to be placed under definitive care. Originality/value This study complements earlier studies by examining the EMS personnel’s perceptions and experiences of major incidents.

scholarly journals Robust GICP-Based 3D LiDAR SLAM for Underground Mining Environment

Sensors ◽  
2019 ◽  
Vol 19 (13) ◽  
pp. 2915 ◽  
Author(s):  
Zhuli Ren ◽  
Liguan Wang ◽  
Lin Bi
Keyword(s):  
Point Cloud ◽  
Underground Mining ◽  
Mine Safety ◽  
Measurement Unit ◽  
3D Point Cloud ◽  
Point Cloud Registration ◽  
Mining Environment ◽  
Localization And Mapping ◽  
Key Frames ◽  
Low Efficiency

Unmanned mining is one of the most effective methods to solve mine safety and low efficiency. However, it is the key to accurate localization and mapping for underground mining environment. A novel graph simultaneous localization and mapping (SLAM) optimization method is proposed, which is based on Generalized Iterative Closest Point (GICP) three-dimensional (3D) point cloud registration between consecutive frames, between consecutive key frames and between loop frames, and is constrained by roadway plane and loop. GICP-based 3D point cloud registration between consecutive frames and consecutive key frames is first combined to optimize laser odometer constraints without other sensors such as inertial measurement unit (IMU). According to the characteristics of the roadway, the innovative extraction of the roadway plane as the node constraint of pose graph SLAM, in addition to automatic removing the noise point cloud to further improve the consistency of the underground roadway map. A lightweight and efficient loop detection and optimization based on rules and GICP is designed. Finally, the proposed method was evaluated in four scenes (such as the underground mine laboratory), and compared with the existing 3D laser SLAM method (such as Lidar Odometry and Mapping (LOAM)). The results show that the algorithm could realize low drift localization and point cloud map construction. This method provides technical support for localization and navigation of underground mining environment.

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