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Microseismic source location method based on multi-level and multi-scale grid similarity coefficient calculation

A similarity coefficient and seismic source positioning technology, which is applied in seismic signal processing and other directions, can solve the problems that the accuracy and real-time performance cannot be satisfied at the same time, the application range is limited, and the calculation efficiency and calculation accuracy cannot be improved at the same time, so as to achieve high-precision microseismic sources Positioning, avoiding the effect of low positioning accuracy

Inactive Publication Date: 2018-07-13
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

[0007] The present invention aims to solve the problem that the calculation efficiency and calculation accuracy of the traditional seismic source location algorithm based on similarity coefficient calculation cannot be improved at the same time, and the accuracy and real-time performance cannot be satisfied at the same time when applied to microseismic source location, resulting in limited application range. Scale grid division, compared with the positioning method of calculating the similarity coefficient in the traditional uniform grid division, improves the calculation efficiency and calculation accuracy of the positioning method at the same time, meets the real-time monitoring of microseismic monitoring, and realizes the precise positioning of the source

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  • Microseismic source location method based on multi-level and multi-scale grid similarity coefficient calculation
  • Microseismic source location method based on multi-level and multi-scale grid similarity coefficient calculation
  • Microseismic source location method based on multi-level and multi-scale grid similarity coefficient calculation

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Embodiment Construction

[0029] The basic implementation steps of the microseismic source location method based on multi-level grid division and similarity coefficient are as follows:

[0030]Step 1: uniformly discretize the microseismic monitoring area into a grid model with i rows×j columns, and store the coordinates of the corresponding grid division points in a two-dimensional array L with i rows×j columns 0 , numbering row by row from the origin to build a two-dimensional array L with i rows × j columns 1 , the array L 1 The value of the element in the value is the average propagation speed of the corresponding grid space physical location, the numbering sequence is the same as L 0 .

[0031] Step 2: According to the array L 1 The value in , calculates the seismic wave travel time from each grid position to each geophone in the i row×j column grid model, and stores it in the i row×j column×m track three-dimensional array L 3 , where m channels represent the number of detector channels. Speci...

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Abstract

The invention discloses a micro-earthquake epicenter positioning method, belongs to the field of earth physics inversion algorithms. The positioning method comprises the following steps that a monitoring area is divided into uniform grids; the earthquake amplitude similarity coefficient corresponding to each grid division point is calculated; the grid position corresponding to the maximal similarity coefficient is selected as an epicenter positioning result; and the grid corresponding to the positioning result is further divided into grids uniformly, the similarity coefficients are calculated, and the grid position corresponding to the maximal similarity coefficient to update the epicenter positioning result till the positioning precision satisfies requirements. Compared with a traditional similarity coefficient positioning method, multilevel multi-scale grid division is carried out on the monitoring area, the disadvantage that the calculation time is too long caused by wholly dense grid division of the monitoring area is overcome, and the defect that the positioning precision is too low due to wholly sparse grid division of the monitoring area is also overcome.

Description

technical field [0001] The invention relates to a microseismic positioning and inversion method using similarity coefficients based on multi-level and multi-scale grid division, and relates to the technical field of geophysical detection, in particular to a microseismic monitoring positioning and inversion method. Background technique [0002] The small underground vibration is the precursor of large-scale dynamic disasters in the underground medium. The real-time location of the microseismic source can effectively monitor the rupture of the underground medium and provide information for the prevention of large-scale dynamic disasters. In the microseismic monitoring work, how to accurately locate the microseismic source is the key to the success of the monitoring work. Microseismic monitoring has been widely used in the engineering field because it can monitor the degree of medium rupture in real time. In the coal mine system, microseismic monitoring is used to judge the rup...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01V1/28
CPCG01V1/28
Inventor 郑晶姜天琪彭苏萍陆继任
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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