Application of Inverter in the Coal Mine

Yu, Zhensheng; Li, Xuming; Shang, Dajing; Wu, Haimiao; Li, Jianhua

doi:10.1109/icmtma.2010.152

Cited by 4 publications

(3 citation statements)

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“…The distributed fiber optic sensor was first proposed by the University of Southampton in 1981 . The basic principle is that the reflected light in the fiber transmission undergoes Rayleigh scatter, Raman scatter, and Brillouin scatter, − and the intensity of the light wave is affected by temperature. By capturing the backscattered light waves, the temperature changes at each point in the cable can be demodulated, and the temperature can be continuously monitored in real time. − The system and principle are shown in (Figure ).…”

Section: Research Progress Of Coal Spontaneous Combustion Monitoring ...mentioning

confidence: 99%

Research Status and Development Trend of Coal Spontaneous Combustion Fire and Prevention Technology in China: A Review

Liu,

Wen,

Chen

et al. 2024

ACS Omega

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Coal seam spontaneous combustion fire is not only one of the main forms of the five major mine disasters, but also the main cause of secondary disasters such as mine gas and coal dust explosions. In recent years, with the advancement of mechanization, automation, and intelligent mine construction, spontaneous coal fires in mines have presented a series of new characteristics, and the prevention and control of spontaneous coal fires are also facing new challenges. On the basis of literature research, this paper summarizes and discusses the basic theory of coal spontaneous combustion, monitoring and early warning methods, and prevention and control technology, summarizes the development process of coal spontaneous combustion theory, reviews the research progress of coal spontaneous combustion monitoring and early warning methods and prevention and control technologies, and discusses the future development direction. In terms of the basic theory of spontaneous combustion of coal, from the initial hypothesis of spontaneous combustion of multielement coal to the unified understanding of coal-oxygen composite theory, a complete set of theoretical systems have been established, and a lot of macro and micro studies have been carried out and analyzed from multiple perspectives. In terms of coal spontaneous combustion monitoring and early warning, from the initial single indicator gas early warning to the construction of gas index system, the hierarchical early warning system is studied, and gradually tends to be perfect. With the development of automation and intelligence technology, the monitoring of coal spontaneous combustion disasters has also formed a new monitoring technology with beam tube monitoring as the traditional method, distributed optical fiber, wireless AD hoc network temperature measurement, and a coal spontaneous combustion multiparameter wireless monitoring system. In terms of fire prevention and control, the traditional “prevention” and “treatment” have changed to the “prevention–control–extinction” technical system based on hierarchical early warning, and the focus has gradually shifted to “prevention”, and a large number of antifire materials have been developed, including blocking materials and fire-fighting materials. However, the precise inhibition and control of coal spontaneous combustion disasters, the evolution model of coal spontaneous combustion under the conditions of multifactor coupling in the field, the reliability and stability of intelligent monitoring system, the noncontact detection method of fire source, and the collaborative adaptation of multiple prevention and control techniques are not yet clear. In the future development, the mechanism of spontaneous coal combustion and its evolution process and other basic theories should be deeply studied. On the basis of the mechanism optimization early warning method of spontaneous coal combustion process, flame retardant and fire prevention materials should be targeted and developed. On the basis of the spatiotemporal evolution of spontane...

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Section: Research Progress Of Coal Spontaneous Combustion Monitoring ...mentioning

confidence: 99%

Research Status and Development Trend of Coal Spontaneous Combustion Fire and Prevention Technology in China: A Review

Liu,

Wen,

Chen

et al. 2024

ACS Omega

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“…This can increase the fatigue strength of roller and extend service life. However, Comparing from the Manufacturing process, flexible roller structure is more complex and the manufacturing requirements are higher [4,5]. From Fig.…”

Section: Structural Characteristics Of Flexible Rollermentioning

confidence: 99%

Finite Element Design and Manufacturing Process of Flexible Roller

Liu

2012

AMR

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“…The main drainage pump system is one of the major energy consumption equipment tools in coal mine. The running state of the pump is important to the security of the coal mine [1]. According to the requirements of Safety Regulations in Coal Mine in china, in order to ensure the drainage pump economic and efficient operation, it is necessary to test the performance of the pump at regular intervals to make the pump work in the high efficiency area, which is closely related to mining security and efficiency.…”

Section: Introductionmentioning

confidence: 99%

Application Research on Testing Efficiency of Main Drainage Pump in Coal Mine Using Thermodynamic Theories

Shang

2017

International Journal of Rotating Machinery

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The efficiency of a drainage pump should be tested at regular intervals to master the status of the drainage pump in real time and thus achieve the goal of saving energy. The ultrasonic flowmeter method is traditionally used to measure the flow of the pump. But there are some defects in this kind of method of underground coal mine. This paper first introduces the principle of testing the main drainage pump efficiency in coal mine using thermodynamic theories, then analyzes the energy transformation during the process of draining water, and finally derives the calculation formulae of the pump efficiency, which meet the on-site precision of engineering. On the basis of analyzing the theories, the protective sleeve and the base of the temperature sensor are designed to measure the water temperature at inlet and outlet of the pump. The efficiencies of pumps with two specifications are measured, respectively, by using the thermodynamic method and ultrasonic flowmeter method. By contrast, the results show that thermodynamic method can satisfy the precision of the testing requirements accuracy for high-flow and high-lift drainage pump under normal temperatures. Moreover, some measures are summed up to improve the accuracy of testing the pump efficiency, which are of guiding significance for on-site testing of the main drainage pump efficiency in coal mine.

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Application of Inverter in the Coal Mine

Cited by 4 publications

References 0 publications

Research Status and Development Trend of Coal Spontaneous Combustion Fire and Prevention Technology in China: A Review

Research Status and Development Trend of Coal Spontaneous Combustion Fire and Prevention Technology in China: A Review

Finite Element Design and Manufacturing Process of Flexible Roller

Application Research on Testing Efficiency of Main Drainage Pump in Coal Mine Using Thermodynamic Theories

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