Coulomb Stress Triggering in the underground mining environment

2007 ◽  
pp. 1415-1422
Author(s):  
G Hofmann ◽  
S Murphy
Keyword(s):  
Underground Mining ◽  
Coulomb Stress ◽  
Mining Environment ◽  
Stress Triggering

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

The Stress Triggering of Aftershocks by Badong M5.1 Mainshock from Coulomb Stress Changes

2014 ◽  
Vol 971-973 ◽  
pp. 2172-2175
Author(s):  
Dong Ning Lei ◽  
Jian Chao Wu ◽  
Yong Jian Cai
Keyword(s):  
Stress Change ◽  
Coulomb Stress ◽  
Coulomb Stress Change ◽  
Coulomb Stress Changes ◽  
Stress Changes ◽  
Stress Triggering

TheCoulomb stress changes are usually adopted to make analysis on faultinteractions and stress triggering. This paper mainly deals with Coulomb stresschange of mainshock and affect on aftershocks. We preliminarily conclude thatthe mainshock produce Coulomb stress change on aftershocks most behavingpositive and triggered them. By calculating it is obvious that more aftershocksfell into stress increasing area and triggering percentage is up to ninety ofmaximum and seventy-one of minimum.

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.

Static Stress Changes and Triggering Imposed by Wenchuan Earthquake on Lushan M7 Earthquake

2014 ◽  
Vol 597 ◽  
pp. 324-327
Author(s):  
Dong Ning Lei ◽  
Yong Jian Cai ◽  
Heng Li
Keyword(s):  
Wenchuan Earthquake ◽  
Static Stress ◽  
Coulomb Stress ◽  
Stress Increase ◽  
Stress Changes ◽  
Stress Triggering ◽  
Important Field ◽  
Earthquake Event ◽  
Space Stress

Some faults rupture the surface followed by coseismic dislocation, which causes space stress changes and transmits or imposes static stress on or to neighboring faults.The static stress triggering leads to the adjacent fault ruptured in advance, which means a Coulomb stress increase and triggers a new earthquake event. In recent two decades, some studies on stress triggering became important field of seismotectonics. The occurrence of both Wenchuan M8.0 earthquake and Japan M9.0 eathquake have arisen interest of many researchers, and obtained much new result and understanding.

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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