Pervasive Environment for Gases Detection and Collapses in Underground Mines

2014 ◽  
Vol 875-877 ◽  
pp. 2056-2061
Author(s):  
Snider Molina ◽  
Ismael Soto ◽  
Lily Sun ◽  
Ke Cheng Liu
Keyword(s):  
Continuous Monitoring ◽  
Dynamic Assessment ◽  
Coal Mines ◽  
Underground Mines ◽  
Monitoring Networks ◽  
Application Development ◽  
Mining Operations ◽  
Technical Parameters ◽  
Pervasive Environment ◽  
Underground Coal Mines

Safety is an element of extreme priority in mining operations; currently many traditional mining countries are investing in the implementation of wireless sensors capable of detecting risk factors. The objective of this research is to contribute to the implementation of sensors for continuous monitoring inside underground mines providing technical parameters for the design of sensor networks applied in underground coal mines. The analyzed of applying these systems in terms of Benefit, Opportunity, Cost and Risk are discussed. Finally, a dynamic assessment of safety at underground mines it is proposed, this approach offers a contribution to design personalized monitoring networks, the experience developed in coal mines provides a tool that facilitates the application development of technology within underground coal mines.

Real Time Entry Prohibition System for Coalmines

2020 ◽  
Vol 11 (2) ◽  
pp. 45-65
Author(s):  
Urmila Shrawankar ◽  
Rahul Neware ◽  
Pranay Mangulkar
Keyword(s):  
Wireless Communications ◽  
Real Time ◽  
Coal Mines ◽  
Well Being ◽  
Base Station ◽  
Wireless Transmission ◽  
Underground Mines ◽  
Software Systems ◽  
Underground Coal Mines ◽  
Favorable Conditions

This article focuses on the hazardous conditions prevailing in underground coal mines and the decision to prohibit entry, when conditions are adverse. Thus, the ongoing observation framework is helpful for ascertaining the conditions for working in underground coal mines and for essential safety and well-being measures. The advancements in WSN lead to advancements in wireless communications. The various sensors are deployed at the location and sense the environment and provide recent activities of the underground coal mines. The sensors transmit the procured information to the base station, principally the A-D transformation. The sensors can be considered a hub to the base station. Wireless transmission is used to send the data to the user. The designed hardware and software systems are used for the identification of the parameters and as per the thresholds, the decision and the prohibition of workers before entering into the mine is decided. The ML system helps in checking the favorable conditions for working in underground mines. While experimenting, real-time sensor generated data is used.

Radiation Disturbance from AC Motors in Underground Coal Mines

2014 ◽  
Vol 490-491 ◽  
pp. 1105-1109
Author(s):  
Ji Ping Sun ◽  
Hui Chen ◽  
Zi Jian Tian
Keyword(s):  
Field Strength ◽  
Coal Mines ◽  
Underground Mines ◽  
National Standard ◽  
Ac Motors ◽  
Radiated Emissions ◽  
Underground Coal Mines ◽  
Electromotor System ◽  
Emission Limits ◽  
Electromagnetic Disturbances

The radiated electromagnetic disturbances produced by operating electromotor equipments in coal mines have some effects on the electromagnetic environment in coal mines. Based on the analysis of the Chinese national EMC standard on rotating electrical machines and the operation characteristics of the electromotor equipments in coal mines, it can be concluded that frequency spectrum of the radiated disturbances resulting from AC motors ranges from 9kHz to 1GHz. The radiated electromagnetic disturbances in the pumping house underground mines have been measured. The results show that the radiated emissions above 30MHz produced by the normal running electromotor system are quite low, which are comparable to the radiated emission limits set in the Chinese national standard GB 755-2008;the maximum radiated field strength reaches about 0.56V/m under 30MHz. However, when motors start or stop, the radiated field strength can reach about 1.26V/m or higher. Therefore, some shielding measures for monitoring and communication equipments should be taken to reduce the radiation interference from AC motors.

Preliminary Recommendations for Handling and Lifting Materials in Underground Low-Coal Mines

1987 ◽  
Vol 31 (8) ◽  
pp. 921-925
Author(s):  
Sean Gallagher ◽  
Thomas G. Bobick ◽  
Richard L. Unger
Keyword(s):  
Task Analysis ◽  
Coal Mines ◽  
Underground Mines ◽  
Low Back ◽  
Coal Miners ◽  
Materials Handling ◽  
Underground Coal Mines ◽  
Lifting Capacity ◽  
Research Findings ◽  
The U.S

The U.S. Bureau of Mines has developed preliminary recommendations for handling materials in low-seam coal mines in an effort to reduce the incidence and cost of low-back pain in underground coal mines. Three main approaches to reducing back injuries are discussed: a) research and development of task specific materials-handling hardware that would reduce the number of manual lifts in underground coal mines, b) examining the supply-handling systems currently in use at low-seam coal mines through task analysis, and c) examining the lifting capacity of low-seam coal miners in the restricted postures that must be used in underground mines. Bureau of Mines research findings and recommendations are presented and discussed.

scholarly journals Numerical Simulation of Coal Microwave Heating and Evaluation of The Reliability of The Results By Changing The Parameters Affecting It

2021 ◽  
Author(s):  
Ali Jebelli ◽  
Arezoo Mahabadi ◽  
Rafiq Ahmad
Keyword(s):  
Numerical Simulation ◽  
Thermal Stress ◽  
Microwave Heating ◽  
Coalbed Methane ◽  
Coal Mines ◽  
Effective Parameters ◽  
Mining Operations ◽  
Thermal Fields ◽  
Underground Coal Mines ◽  
Increase Rate

Abstract In most mines, methane gas is accumulated in pores inside coal, the highest amount of which is found in coal mines, and methane is the most important polluting gas in underground coal mines. In coal mining operations, coalbed methane is one of the potential hazards that must be extracted to prevent an explosion of the accumulated gas and environmental pollution. One of the mechanisms is using microwave irradiation so that the thermal stress caused by microwave heating generates fractures. In this research, we investigated the most important parameters affecting the electric and thermal fields’ distribution in coal in order to identify the effective parameters that achieve the highest temperature increase rate and to reach the highest impact and efficiency of the system with the least amount of consumed energy. The results of this study show that the most effective parameter on the electric and thermal fields’ distribution within coal is the size of the resonance chamber.

Design of Position System of Underground Mines Based on Zigbee Technology

2013 ◽  
Vol 340 ◽  
pp. 691-695 ◽  
Author(s):  
Bao Ding Zhang ◽  
Bai Shun Su
Keyword(s):  
Monitoring System ◽  
Coal Mines ◽  
Safety Monitoring ◽  
Underground Mines ◽  
Mine Safety ◽  
Position System ◽  
Position Information ◽  
Zigbee Technology ◽  
Safety Monitoring System ◽  
Underground Coal Mines

Safety problem has been one of the major issues in coal mining process. Therefore, a perfect mine safety monitoring system is necessary. It is one of the important aspects of a safety monitoring system how to acquire the exact position information real-timely of staff underground coal mines. To solve the problem of how to acquire of miners position, based on coal mine structure characteristics, with Zigbee technology, a kind of position system of underground coal mines is designed in the paper, and the efficiency of mine safety monitoring system can be improved greatly.

Whole-Body Vibration Exposures in Undeground Coal Mining Operations

2016 ◽  
Vol 60 (1) ◽  
pp. 914-918
Author(s):  
D. Lynas ◽  
R. Burgess-Limerick
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Coal Mines ◽  
Whole Body Vibration ◽  
Electrical Equipment ◽  
Whole Body ◽  
Mining Equipment ◽  
Mining Operations ◽  
Body Vibration ◽  
Underground Coal Mines

Studies conducted on surface coal mining equipment have identified whole-body vibration as a significant hazard. Operators of underground mobile equipment, particularly shuttle cars and transport vehicles, are likely to be exposed to significant levels of whole-body vibration. To date, measuring whole-body vibration from underground mining mobile equipment has been difficult due to the strict guidelines governing the use of electrical equipment in underground mines. This paper presents data obtained from two low-methane coal mines using an iOS application installed on iPod Touch devices. The majority of measurements taken from a range of mobile plant and equipment in use at the underground coal mines exceeded the ISO2631.1 Health Guidance Caution Zone. Further investigations are being undertaken to develop a thorough understanding of whole-body vibration exposures to which operators of mobile equipment used in underground coal mines are exposed and the opportunities for application of this information to assist mine site safety, health and risk management processes.

A risk-based method for the design of monitoring networks for surface gas emanations from abandoned underground coal mines

2014 ◽  
Vol 73 (5) ◽  
pp. 2061-2078 ◽  
Author(s):  
Christophe Frippiat ◽  
Mathieu Veschkens ◽  
John-Henri Van Massenhove ◽  
Daniel Pacyna
Keyword(s):  
Coal Mines ◽  
Monitoring Networks ◽  
Underground Coal Mines

scholarly journals Monitoring of Roof Bolting as an Element of the Project of the Introduction of Roof Bolting in Polish Coal Mines—Case Study

Energies ◽  
2021 ◽  
Vol 15 (1) ◽  
pp. 95
Author(s):  
Artur Dyczko ◽  
Paweł Kamiński ◽  
Jacek Jarosz ◽  
Zbigniew Rak ◽  
Dariusz Jasiulek ◽  
...  
Keyword(s):  
Coal Mines ◽  
Underground Mines ◽  
Validity And Reliability ◽  
Coal Basin ◽  
Roof Bolting ◽  
Rock Bolting ◽  
Underground Coal Mines ◽  
Mining Conditions ◽  
Evaluation Of Data

Roof bolting is the most popular type of support for underground mines’ workings. However, in Polish coal mines it is used only as a supplementary support. To raise the effectiveness and economic score of horizontal development works, JSW (Jastrzębska Spółka Węglowa) started a project to introduce the independent rock bolting support in its mines. The key element of the project is the monitoring of mine workings supported with roof bolting, as appropriate control allows one to ensure a proper level of safety. The following work presents a monitoring system for mine working supported with roof bolting applied in the project, as well as results of the measurements obtained using this system. The aim of the monitoring was to prove that independent roof bolting provides a proper level of safety and thus is applicable in conditions of Polish underground coal mines, particularly Budryk mine. It was to be proved by the evaluation of data obtained from instrumented bolts, extensometers of different type and convergence measurements. These results allowed us to verify the validity and reliability of the roof bolting in geological and mining conditions of Silesian Coal Basin.

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