Transient electromagnetic simulated earthquake detection method used for coal mine underground

A transient electromagnetic and detection method technology, applied in the field of detection, can solve problems such as low precision of hidden danger detection, limited excitation energy of emission wire frame, and unstable operation of equipment, so as to weaken the influence of volume effect, increase the density of detection data, and improve The effect of probing accuracy

Active Publication Date: 2015-01-07
XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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Problems solved by technology

[0007] The present invention mainly solves the problems existing in the prior art, such as limited excitation energy of the emission line frame, unstable operation of equipment, and low detection accuracy of hidden dangers, etc., and proposes a transient electromagnetic quasi-seismic detection method for underground coal mines. Each detection grid increases the measurement data, which greatly reduces the influence of environmental

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  • Transient electromagnetic simulated earthquake detection method used for coal mine underground
  • Transient electromagnetic simulated earthquake detection method used for coal mine underground
  • Transient electromagnetic simulated earthquake detection method used for coal mine underground

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Embodiment

[0034] figure 1 It is a schematic diagram of the traditional coal mine transient electromagnetic detection method. The traditional transient electromagnetic detection method uses a single point to excite in the direction of the vertical survey line, and the detection method of receiving in the same direction results in a small number of survey points passing through the abnormal body.

[0035] figure 2 Shown is an improved transient electromagnetic quasi-seismic detection method used in underground coal mines. It can be seen from the figure that this method increases the measurement data for each detection grid, improves the detection data density passing through the abnormal body, and converts the transient field data into virtual wave field data, weakening the volume effect of the electromagnetic method influences.

[0036] This embodiment is realized through the following steps:

[0037] (1) Design the direction of the survey line according to the detection area, and a...

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Abstract

The invention relates to a detection method which is mainly used for coal mine underground detection, in particular to a transient electromagnetic simulated earthquake detection method used for coal mine underground. According to the method, measured data are added for each detection grid, influences caused by environmental factors in a roadway are substantially weakened, the density of detection data passing abnormal bodies is enhanced, and transient field data are converted into virtual wave field data, so that the influence caused by the volume effect of the electromagnetic method is weakened; meanwhile, the advanced fine processing technology of earthquakes is adopted for the method, fine explanation of geological anomalies is facilitated, and the detection accuracy for potential mine water disaster hazards can be remarkably improved.

Description

technical field [0001] The invention relates to a detection method, which is mainly used for underground coal mine detection, in particular to a transient electromagnetic quasi-seismic detection method for underground coal mines. Background technique [0002] The transient electromagnetic method is to use an ungrounded return line or a grounded line source to emit a pulsed magnetic field underground, and use a coil or a grounding electrode to observe the secondary eddy current field during the gap between the primary pulsed magnetic field. [0003] The small wire frame transient electromagnetic method is an electromagnetic prospecting method that has been widely used in the fields of coal mine advanced prospecting, roof and floor water damage detection, side walls and internal water damage detection of working faces in recent years. But at present, there are following problems in this method in the prior art: [0004] 1. The excitation energy of the wire frame is limited: d...

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Application Information

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IPC IPC(8): G01V3/30
Inventor 范涛赵兆王继矿刘磊赵睿宁殿艳石显新鲁晶津张仲礼李德山
Owner XIAN RES INST OF CHINA COAL TECH& ENG GROUP CORP
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