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Method for accurately extracting detonation moment in underground distributed slot wave seismic exploration

A technology for seismic exploration and detonation time, which is applied in the field of coal mine geophysical exploration to improve exploration efficiency and system automation.

Inactive Publication Date: 2020-05-29
何良
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Problems solved by technology

[0004] In order to overcome the shortcomings of the traditional detonation time extraction method, the present invention provides a method for detonation time extraction of an underground distributed channel wave seismic exploration system

Method used

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  • Method for accurately extracting detonation moment in underground distributed slot wave seismic exploration
  • Method for accurately extracting detonation moment in underground distributed slot wave seismic exploration
  • Method for accurately extracting detonation moment in underground distributed slot wave seismic exploration

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Embodiment Construction

[0016] Such as figure 1 As shown, the electromagnetic sensor signal is input into the recorder, and the time window energy ratio algorithm is used to calculate the long and short time window energy ratio, and compare it with the set threshold a. Set the short-time window rear boundary whose ratio is greater than the set threshold a as the take-off time of the electromagnetic sensor, and use this as a starting point to intercept the signal of the preset duration from the vibration sensor signal, which can be set according to the detonator section number with the handheld terminal. Certainly. In the intercepted vibration sensor signal, the time window energy ratio algorithm is used again to find the rear boundary of the short time window when the ratio is greater than the threshold b, and output as the detonation time.

[0017] figure 2 A schematic diagram of the device structure. The device includes: a recorder, an electromagnetic sensor and a shock sensor, etc. The electr...

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Abstract

The invention relates to a method for accurately extracting a detonation moment in underground distributed slot wave seismic exploration. In the method, a recorder needs to be connected with an electromagnetic sensor and a vibration sensor. When in use, the electromagnetic sensor is used for extracting a trigger signal of an exploder, the vibration sensor is used for extracting a vibration signalnear a shot point, and the recorder is used for carrying out operation processing on recorded and stored signals acquired by the two sensors and outputting effective and accurate explosion time. According to the method, the problem that a traditional recorder cannot eliminate false triggering, misfire and strong shock interference is solved, the extracted initiation time is accurate initiation time, and delay correction does not need to be carried out according to the detonator segment number any more.

Description

technical field [0001] The invention belongs to the technical field of coal mine geophysical exploration, and in particular relates to a method for accurately extracting detonation time in underground distributed channel wave seismic exploration. Background technique [0002] Coal is the most important primary energy source in my country, and has long dominated the country's total energy consumption. The complex geological structure of coal seams in my country leads to frequent safety accidents in coal production. Channel wave seismic exploration, as an accurate and effective underground exploration method, is currently the most accurate and practical technical means for coal seam geological structure detection, and plays an important role in guiding coal mine safety production. The distributed channel wave seismic exploration system it uses greatly facilitates underground construction due to its cable-free design, but this type of system needs to extract accurate detonatio...

Claims

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Application Information

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IPC IPC(8): G01V11/00
CPCG01V11/00
Inventor 何良
Owner 何良
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