Eureka AIR delivers breakthrough ideas for toughest innovation challenges, trusted by R&D personnel around the world.

A Resistivity Correction Method of Mine Transient Electromagnetic Method

A technology of transient electromagnetic method and correction method, which is applied in electric/magnetic exploration, radio wave measurement systems, instruments, etc., can solve the problems of low resistivity and distortion of mine transient electromagnetic method, and achieve low resistivity, Eliminate mutual induction signals and improve the effect of detection depth

Active Publication Date: 2019-04-30
CHINA UNIV OF MINING & TECH (BEIJING) +1
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the deficiencies in the above-mentioned prior art, the present invention provides a mine transient electromagnetic method resistivity correction method to solve the problem of mine transient electromagnetic method low resistivity distortion

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Resistivity Correction Method of Mine Transient Electromagnetic Method
  • A Resistivity Correction Method of Mine Transient Electromagnetic Method
  • A Resistivity Correction Method of Mine Transient Electromagnetic Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] In order to illustrate the resistivity correction effect of the method of the present invention, the comparative test results of the conventional method and the method of the present invention are given.

[0026] Both the conventional method and the detection test of the method of the present invention are carried out in a mine roadway. The geological conditions of the detection site are known. According to the geological and drilling data, there are no abnormal structures and water bodies within the detection range, and the average resistivity of the formation is 80Ω·m. The detection instrument adopts the same type of transient electromagnetic instrument, 1.5m×1.5m×81 turns transmitting coil, 25Hz system frequency, 30 sampling time gates (6.8μs~6978μs equal logarithmic division).

[0027] The specific steps of the conventional method are:

[0028] (1) Place the transmitting coil 1 at the measuring point, set the sending and receiving distance to TR1=8m, and obtain a f...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to an electrical resistivity correcting method for a mine transient electromagnetic method. The method includes 1, placing an emitting coil at a measurement point position, setting a transmit-receive distance as TR1, acquiring a primary field value as indicated in the description and a secondary field value containing mutual inductance electro-dynamic potential as indicated in the description through instrument data collection; 2, keeping the position of the emitting coil unchanged, increasing the transmit-receive distance to TR2, acquiring primary field value as indicated in the description and a secondary field value containing mutual inductance electro-dynamic potential as indicated in the description through instrument data collection; 3, putting collected data into a correction formula as indicated in the description for cancelling the mutual inductance electro-dynamic potential, and obtaining a ground secondary field signal V2; 4, performing whole-area apparent resistivity calculation and time depth conversion on the secondary field signal V2 subjected to mutual inductance electro-dynamic potential cancelling and obtaining an apparent resistivity-depth curve. According to the invention, electrical resistivity correction is performed by utilizing transmit-receive distance observation data of two different processes and mutual inductance signals are cancelled, the valid ground secondary field signal is extracted and a problem of electric resistivity distortion caused by using the mine transient electromagnetic method can be solved well. Since the detection depth is in direct proportion to and the electric resistivity, the detection depth of the mine transient electromagnetic method is improved.

Description

technical field [0001] The invention relates to the field of geology and exploration geophysics, in particular to a mine transient electromagnetic method resistivity correction method. Background technique [0002] Transient Electromagnetic Method (TEM) is a time-domain artificial electromagnetic detection method based on the principle of electromagnetic induction. It uses the ungrounded return line or grounding wire to launch a primary field underground, and after the primary field is turned off, measures the change of the induced secondary field generated by the underground medium with time to achieve various geological targets. exploration method. When the transient electromagnetic method is applied to mine underground detection, it is called mine transient electromagnetic method (Mine Transient Electromagnetic Method, MTEM for short). [0003] The mine transient electromagnetic method uses a multi-turn square (or circular) small loop source with a side length of less t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01V3/38G01V3/08
CPCG01V3/08G01V3/38
Inventor 程久龙李飞温来福张洪川张睿敏
Owner CHINA UNIV OF MINING & TECH (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com