TEM Magnetic Survey Instruments Transient Electromagnetic For Water
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Magnetic Survey Instruments for Water and Metal Mining
Transient electromagnetic method (TEM) is also called Time domain electromagnetic Method (TEM). It transmits a electromagnetic pulse into the ground by using an ungrounded loop or ground wire source. During the interval of the magnetic pulse, a coil or ground electrode is used to observe the secondary eddy current field. Simply put, the fundamental principle of TEM is the law of electromagnetic induction. The decay process is generally divided into early, middle and late stages. The early electromagnetic field is equivalent to the high-frequency components in the frequency domain, which attenuates quickly and has a small skin depth. While the late component is equivalent to the low frequency component in the frequency domain, slow attenuation, large skin depth. The geoelectric characteristics of different depths can be obtained by measuring the change law of secondary field with time in each time period after power failure.
Application:
1. Surface detection of aquifers, fault water bearing, coal seam structure and subsidence 2. The water storage structure inside and outside the mining area and in front of the header is detected downhole 3. To detect the depth and occurrence of good conductive ore body, and to detect the structure of ore accumulation 4. Detect the old kiln and its water content 5. Engineering exploration and environmental exploration 6. Oil and gas exploration and so on
Techenical Specification
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