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.

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.

scholarly journals Development of a Protective Enclosure for Remote Sensing Applications—Case Study: Laser Scanning in Underground Coal Mines

Resources ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 56 ◽  
Author(s):  
Mark Dunn ◽  
Peter Reid ◽  
John Malos
Keyword(s):  
Laser Scanning ◽  
Coal Mines ◽  
Mining Industry ◽  
Electrical Equipment ◽  
Regulatory Requirement ◽  
Sensing Applications ◽  
Mapping System ◽  
Underground Coal Mines ◽  
Remote Operations

Sensing for equipment location and mapping in explosion risk zones such as underground coal mines is a difficult proposition due to the regulatory requirement for certified protective enclosures to safely house the required complex electrical equipment. This paper provides a case study for the process involved in creating and implementing an optical-grade enclosure for use in these environments. The result of this process has been the creation of ExScan®, a 3D laser mapping system that is providing step-change capability for remote operations and automation in the underground coal mining industry.

scholarly journals Productivity Improvement in Underground Coal Mines - A Case Study

2021 ◽  
Vol 12 (3) ◽  
Author(s):  
Devi Prasad Mishra ◽  
Mamtesh Sugla ◽  
Prasun Singha
Keyword(s):  
Coal Mines ◽  
Productivity Improvement ◽  
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.

scholarly journals Productivity Improvement in Underground Coal Mines - A Case Study

2013 ◽  
Vol 12 (3) ◽  
pp. 48-53 ◽  
Author(s):  
Devi Prasad Mishra ◽  
Mamtesh Sugla ◽  
Prasun Singha
Keyword(s):  
Coal Mines ◽  
Productivity Improvement ◽  
Underground Coal Mines

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.

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