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Microseismic/acoustic emission source localization method in complex structure with empty space

An acoustic emission source and complex structure technology, applied in positioning, measuring devices, instruments, etc., can solve the problems of poor positioning accuracy and achieve the effect of improved positioning accuracy and simple operation

Pending Publication Date: 2019-05-31
CENT SOUTH UNIV
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Problems solved by technology

[0004] The technical problem solved by the present invention is to provide a brand-new method for locating microseismic / acoustic emission sources in complex structures with voids in view of the poor positioning accuracy of existing microseismic / acoustic emission source positioning methods in complex structures with voids , taking into account the actual situation of elastic wave propagation, the positioning can be completed more precisely

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  • Microseismic/acoustic emission source localization method in complex structure with empty space
  • Microseismic/acoustic emission source localization method in complex structure with empty space
  • Microseismic/acoustic emission source localization method in complex structure with empty space

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Embodiment Construction

[0034] Hereinafter, the present invention will be further described in detail with reference to the drawings and specific embodiments.

[0035] The invention discloses a method for locating a microseismic / acoustic emission source in a complex structure containing a void area, which includes the following steps:

[0036] Step 1: Environmental preparation;

[0037] Install one sensor at multiple different positions on the two-dimensional positioning area (install one sensor at each of the four different positions on the two-dimensional positioning area);

[0038] Step 2: Data collection;

[0039] Receive the P wave signal generated by the unknown real microseismic / acoustic emission source through the sensor, and record the kth sensor S k The actual time of receiving the P wave signal is Calculate two sensors S l And sensor S k The difference between the actual time when the P wave signal is received m is the total number of sensors that receive P wave signals;

[0040] Step 3: Calculatio...

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Abstract

The invention discloses a microseismic / acoustic emission source localization method in a complex structure with an empty space. The method comprises the following steps of: the step 1, installing sensors at different positions on a two-dimensional location area; the step 2, recording difference of actual time of receiving P-wave signals generated by an unknown microseismic / acoustic emission sourceby different sensors; the step 3, selecting nodes on the location area, and calculating the difference of theoretical travel time of the P-wave signals generated by the microseismic / acoustic emissionsource and excited at the nodes from the nodes to different sensors; and the step 4, determining the degree of deviation between each node and the unknown microseismic / acoustic emission source according to the actual time difference and the difference of theoretical travel time to determine a node having the smallest deviation from the microseismic / acoustic emission source, and taking the node coordinates as the location coordinates of the microseismic / acoustic emission source.

Description

Technical field [0001] The invention relates to a method for positioning a microseismic / acoustic emission source in a complex structure containing a void area. Background technique [0002] With the gradual depletion of shallow mineral resources and the utilization of underground space, mining and underground engineering are continuing to deepen. In deep areas, the huge in-situ stress combined with the stress concentration caused by tectonic stress makes the deep rock volume accumulate a lot of energy. The disturbance and unloading caused by underground excavation causes the energy of the rock mass to be released instantly, forming a rockburst disaster. In recent years, microseismic monitoring technology has been used as an effective way to monitor and control rock bursts. In addition, in mechanical testing, acoustic emission (AE) testing, as a non-destructive testing technology, is getting more and more attention and use. [0003] Microseismic / acoustic emission source location ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S5/22
CPCG01S5/22
Inventor 董陇军胡清纯李夕兵
Owner CENT SOUTH UNIV
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