Irrespective of the specific electromagnetic stirring (EMS) technique employed, the underlying principle remains consistent: molten steel, in the presence of a magnetic field generated by the EMS, cuts through magnetic flux lines, inducing electrical currents within the steel [16].The molten steel, now carrying this induced current, …
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In the period from 2008 to 2012, the topic of electromagnetic (EM) induction methods applied to mineral exploration has been the subject of more than 50 papers in journals and more than 300 extended abstracts presented at conferences (about 100 of which contain developments worthy of mentioning). Most of the work at the universities has been on …
This course explores electromagnetic phenomena in modern applications, including wireless and optical communications, circuits, computer interconnects and peripherals, microwave communications …
It poses the greatest threat to coal production safety. Now, in working face of Huafeng Coal Mine, the EMR testing equipment named KBD7 on-line electromagnetic radiation monitor, which was invented and developed by China University of Mining and Technology, is being used to continuously monitor and forecast rock burst.
The transient electromagnetic method (TEM) for boreholes uses fixed source loops to launch at excavation faces, and is able to realize the mobile reception of secondary fields in the boreholes and detections of low-resistance hazards.This method is known as high detection accuracy, due to the fact that the receiving points are close to the anomalies.
Anticipating roof fall in mine workings has been a problem for centuries. The focus in the search for early warning indicators has been on observing seismic (acoustic) events prior to the fall. ... Application to ice electromagnetic radiation. Philos. Mag., B, 67 (3) (1993), pp. 301-315. CrossRef View in Scopus Google Scholar. Petrov and ...
Electromagnetic (EM) techniques are extremely important as a direct detection geophysical tool utilized in the base metal industry. They were developed in countries such as Canada, whose thin conductive weathering overburden did not hamper the penetration of EM signals and enabled exploration to depths on the order of 300 m. As a result, EM …
It is a technology based on physical chemistry of metallurgical process, metallurgical reaction engineering, and metallurgical process theory, combined with theories of electromagnetism and modern magnetohydrodynamics, using electromagnetic fields to optimize the dynamical environment or state of metallurgical reactions, strengthen the …
APPLICATION OF VLF-EM METHOD TO MINERAL EXPLORATION APPLICATION OF VERY LOW FREQUENCY (VLF) ELECTROMAGNETIC METHOD TO MINERAL EXPLORATION …
The VTEM™ and ZTEM™ helicopter-borne electromagnetic systems are examples of active source (time-domain EM) and passive natural field (tipper AFMAG) systems that were primarily designed for deep penetration mineral exploration applications. ... An example of successful application of VTEM™ for gold exploration …
1 Mar 20193 January 20193814959 IEEE Access A Comparison of Surface-to-Coal Mine Roadway TEM and Surface TEM Responses to Water ... on Microwave, Antenna, Propagation and EMC Technologies for Wireless Communications1 Nov 2011 Advanced Materials Research Applications of Electromagnetic Methods in Selecting Ground …
Flow measurement for all industries & different applications by Endress+Hauser. Browse through our wide range of electromagnetic flowmeters! ... primarily used in water management and in the processing, life sciences and food industries. In tunnel construction and mining, robust magmeters are often the only option for measuring highly abrasive ...
Hidden, water-abundant areas in coal mines pose a serious threat to mine safety and production. Underground transient electromagnetic method (TEM) is one of the most effective means of detecting water-abundant areas in front of the roadway head. Traditional TEM theories and applications are interpreted mainly on the vertical …
electromagnetic spectrum, the entire distribution of electromagnetic radiation according to frequency or wavelength.Although all electromagnetic waves travel at the speed of light in a vacuum, they …
An electromagnetic survey is based on the response of the ground to the propagation of electromagnetic fields composed of an alternating electric intensity and magnetizing force. A primary or inducing field is generated by passing an alternating current through a coil (loop of wire called a transmitter coil) placed over the ground.
In this paper, we focus on reviewing the application and development of electromagnetic methods, such as magnetotelluric (MT), audio magnetotelluric (AMT), …
Wang, E., et al.: Electromagnetic emission graded warning model and its applications against coal rock dynamic collapses. International Journal of Rock Mechanics & Mining Sciences 48, 556–564 (2011)
Electromagnetic radiation induced by mining rock failure. Int. J. Coal Geol. 64(1-2), 57-65. ... EMR technique is vastly used in the mining industry, its application in geological studies is ...
Mine floods caused by water-bearing collapse columns are one of the most significant types of coal mine disasters in advanced detection. The transient electromagnetic method (TEM), one of the most effective means, can detect the collapse column in coal mines. However, the research on TEM used on the ground is mainly …
Induced Roll Magnetic Separators - an electromagnetic version of the Rare Earth Roll Separator commonly used for more arduous applications such as abrasives and refractory minerals; Magnetic Disc Separators …
In "Twelve Five" period, coal and other energy will continue to be the main bodys of China's energy supply, coal will continue to play a basic role in China's energy security. Coal has become a major basic industry, the proportion of primary energy production and consumption more than 60% for a long time. But a long time, in China's coal mine there …
Enyuan, W., et al.: Comprehensive monitoring technique based on electromagnetic radiation and its applications to mine pressure. Safety Science (50), 885–893 (2012) Article Google Scholar Frid, V., et al.: Formation of electromagnetic radiation in coal stratum. Journal of Mining Science 28(2), 139–145 (1992)
A Review of Electrical and Electromagnetic Methods for Coal Mine Exploration in China. Publisher: IEEE. Cite This. PDF. Guoqiang Xue; Wen Chen; …
Preface. vii. Throughout the book, an in- depth view into the theory and application of four Electromagnetic geophysical techniques known as Ground Penetrating Radar (GPR), …
In the field of wireless communication, the increasing number of devices makes limited spectrum resources more scarce and accelerates the complexity of the electromagnetic environment, posing a serious threat to the sustainability of the industry's development. Therefore, new effective technical methods are needed to mine and …
Global Fourth-generation Vertical Ring High Gradient Magnetic separator (Oil-water complound cooling) Application: This type of magnetic separation machine is used in wet separation processes for smaller than …
Electrical methods of geophysics are fundamental in mineral exploration because they can directly detect and delineate conductive sulfide minerals. Electromagnetic methods are …
Time-domain electromagnetic (or transient electromagnetic, TEM) is one of the most commonly used EM methods for minerals due to its high efficiency and high signal-noise ratio compared to other...
The gravity, magnetic, resistivity, and induced-polarization surveys all are volume dependent, whereas the electromagnetic method is dependent only upon the area of the …