Optimal Sensor Placement Based on Simulation of Gas Distribution in Underground Heading Face

2012 ◽  
Vol 562-564 ◽  
pp. 1788-1791
Author(s):  
Feng Ying Ma
Keyword(s):  
Gas Sensor ◽  
Sensor Placement ◽  
Mine Safety ◽  
Outer Side ◽  
Gas Distribution ◽  
Turbulent Dissipation ◽  
Geometry Model ◽  
Safety Regulations ◽  
Production Safety ◽  
Turbulent Kinetic Energy Equation

The gas sensor is significant for coalmine production safety. In order to carry out optimal gas sensor placement in heading face, the software named Fluent was used to simulate underground gas distribution. Geometry model was established and divided by grids. Gas distribution in heading face was simulated using RNG k-ε model by Fluent according to conversation equation in turbulent state, turbulent kinetic energy equation and turbulent dissipation rate equation. The results show that gas is likely to accumulate in the upper corner, when wind passes through the corner after washing heading face, wind velocity is unstable, the performance of sensor placed in inner side of turning is different from that placed in outer side of turning. Distance of gas sensor to heading face should be no more than 10m which accords with the mine safety regulations well. The result shows that gas can be monitored effectively by applying this method which has an important value and instructive significance.

Sensor Deployment Optimization Based on Simulation of Gas Distribution in Underground Fully Mechanized Coal Face

2012 ◽  
Vol 503-504 ◽  
pp. 1468-1471
Author(s):  
Feng Ying Ma
Keyword(s):  
Energy Equation ◽  
Sensor Deployment ◽  
Outer Side ◽  
Gas Distribution ◽  
Coal Face ◽  
Turbulent Dissipation ◽  
Geometry Model ◽  
Production Safety ◽  
Turbulent Kinetic Energy Equation ◽  
Fluent Software

The gas sensor is very important for coalmine production safety. The Fluent software was used to simulate underground gas distribution. Geometry model was established and divided by grids. Gas distribution in fully mechanized coal face was simulated using RNG k-ε model according to conversation equation in turbulent state, turbulent kinetic energy equation and turbulent dissipation rate equation. The results show that gas is likely to accumulate in the upper corner, when wind passes through the corner after washing fully mechanized coal face, wind velocity is unstable, performance of sensor placed in inner side of turning is different from that placed in outer side of turning. The result shows that gas can be monitored effectively with this method which has an important value and instructive significance.

On Miner's Location in Underground Mines

2021 ◽  
pp. 80-83
Author(s):  
A.V. Novikov ◽  
K.V. Panevnikov ◽  
I.V. Pisarev
Keyword(s):  
Coal Mine ◽  
Coal Mines ◽  
Underground Mines ◽  
Mine Safety ◽  
National Standard ◽  
Positioning Systems ◽  
Safety Requirements ◽  
Safety Regulations ◽  
Mining Safety ◽  
Safety Systems

To ensure industrial and mining safety the established safety rules for coal mines envisage the use of a number of complexes and systems, combined into multifunctional safety systems. These automated systems provide for people to be involved in the management of technological processes. The purpose of this paper is to assess how the coal mine safety requirements are aligned with other regulatory documents as they apply to modern safety systems in coal mines. To achieve this goal, the personnel location (positioning) and emergency alert systems in coal mine workings are analyzed for compliance with the requirements of the national standard for multifunctional safety systems in coal mines. It is shown that the current requirements for positioning systems are met by systems that have high accuracy in determining the location coordinates of people. It is suggested that positioning systems of the zonal type should be either upgraded to increase the number of readout devices to bring them up to the requirements of safety regulations in coal mines or replaced.

Establishing Mine Water Supply Network Physical Model Based on the Abnormal Similar Theory

2013 ◽  
Vol 421 ◽  
pp. 850-854
Author(s):  
Zhong An Jiang ◽  
Lei Lei Shi ◽  
Pei Wang
Keyword(s):  
Water Supply ◽  
Physical Model ◽  
Flow Rate ◽  
Mine Water ◽  
Similarity Criterion ◽  
Mine Safety ◽  
Supply Network ◽  
Water Supply Network ◽  
Safety Regulations ◽  
Similar Theory

It’s necessary to establish a perfect dust water supply system according to Coal mine safety regulations. In order to do researches on the reliability of mine dust water supply network, this paper deduces the similarity number of flow rate and pressure under the condition of abnormal similarity, and establish the physical model of mine water supply network according to the gravity similarity criterion at first in lin-nan mine as the background. Monitor the running status of the whole network, measure the flow rate and pressure of the monitoring stations, and then contrast the experiment result and EPANETH simulation result with the data of the original network. The results show that physical model meets gravity similarity under the condition of abnormal similarity, which provides the experimental basis for the follow-up research on mine water supply network.

scholarly journals ZIGBEE BASED MINE SAFETY MONITORING SYSTEM WITH GSM

2015 ◽  
pp. 98-102
Author(s):  
RAJKUMAR BODDU ◽  
P. BALANAGU ◽  
N. SURESH BABU
Keyword(s):  
Monitoring System ◽  
Coal Mine ◽  
Safety Monitoring ◽  
Mine Safety ◽  
Network Systems ◽  
Zigbee Technology ◽  
Coal Mine Safety ◽  
Safe Production ◽  
Production Safety ◽  
Safety Monitoring System

In this work, a safe Coal Mine Monitoring system which replaces the traditional coal mine monitoring systems which tend to be wired network systems. This play an important role in coal mine safe production. With continuous enlarging of exploiting areas and extension of depth in coal mine, many laneways become monitoring blind areas, where are lots of hidden dangers. Moreover, it is inconvenient to lay cables which are expensive and consume time. In order to solve the problems, we designed a coal mine safety monitoring system based on wireless sensor network, which can improve the level of monitoring production safety and reduce accident in the coal mine. Zigbee technology provides a direction for scientists who commit to solve the safety monitoring problems of coal mine. The purpose of this study is to propose a solution suitable to mine wireless communication, safety monitoring, give a proof to the further study.

scholarly journals Implementación de las normas ATEX en el contexto de la actividad minera en Colombia

2017 ◽  
Vol 26 (45) ◽  
Author(s):  
Linda Mishell Jaramillo-Urrego ◽  
Jorge Martín Molina-Escobar ◽  
Javier García-Torrent ◽  
Ljiljana Medic-Pejic
Keyword(s):  
Occupational Safety ◽  
International Standards ◽  
Mine Safety ◽  
Safety Regulations ◽  
Safety And Health ◽  
Safety Code ◽  
Technical Content ◽  
International Mine ◽  
Mining Safety ◽  
Mandatory Adoption

Mining in Colombia is regulated by the Mining Safety Code and although it had not been updated since 1987, the references of safety that has owned were based on international standards. However, these do not have a mandatory adoption and Decree 1886/15, despite its strong component in occupational safety and health, continues to show a rough technical content that could consent the extension of mining disasters associated with explosions in Colombia. The article specifies the international mine safety regulations and shows a critical analysis before the absence of its applicability in the country. Although the national outlook is discouraging because of the lack of rigor from governmental entities in enforcement, mining in other countries has reported improvements in safety by implementing standards that ensure quality operations and procedures, machinery and human resources, decreasing mining disasters.

Automatic Monitoring System for Coal Mine Safety Based on nRF24E1

2011 ◽  
Vol 130-134 ◽  
pp. 158-161
Author(s):  
Ying Li Zhu ◽  
Wang Hui Zeng ◽  
Ling Qing Xie
Keyword(s):  
Monitoring System ◽  
Coal Mine ◽  
Low Cost ◽  
Automatic Monitoring ◽  
Sensor Nodes ◽  
Mine Safety ◽  
Automatic Monitoring System ◽  
Coal Mine Safety ◽  
Production Safety ◽  
On Line

This paper describes the design of monitoring system for coal mine safety constructed by MSP430 and nRF24E1, which has described the structure of the system, working principle, and gives the hardware design of sensor nodes and the software design. This system is used for on-line monitoring of coal mine safety with the character of simple structure, low cost, low power consumption and so on, which will improve the level of monitoring production safety and reduce accident in the coal mine.

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