Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A Multi-directional Total Variational Regularized Tomography Method for Surrounding Rock in Coal Mine Working Face

A tomographic imaging and working face technology, applied in the field of mine geophysical detection, can solve problems such as the step effect of smooth areas, and achieve the effects of weakening the step effect, high imaging accuracy, and fast calculation speed

Active Publication Date: 2021-04-06
CHINA UNIV OF MINING & TECH (BEIJING)
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Total variation regularization has been widely used in the field of image reconstruction. The traditional isotropic or anisotropic total variation only applies the horizontal and vertical gradient information of the image. Although the edge information of the image can be well preserved, the There is a staircase effect in the smooth region

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 Multi-directional Total Variational Regularized Tomography Method for Surrounding Rock in Coal Mine Working Face
  • A Multi-directional Total Variational Regularized Tomography Method for Surrounding Rock in Coal Mine Working Face
  • A Multi-directional Total Variational Regularized Tomography Method for Surrounding Rock in Coal Mine Working Face

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Embodiments of the invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below by referring to the figures are examples only for explaining the present invention and should not be construed as limiting the present invention.

[0036] The transmitted waves in the coal mine working face include refracted waves and direct waves. The schematic diagram of the ray paths of refracted waves and direct waves is shown in figure 2 As shown, the thickness of the coal seam is d, the shot point and the receiver point are placed at d / 2, the critical angle of the refracted wave is θ, when the incident angle is equal to θ, a refracted wave is generated, and the refracted wave propagates along the surrounding rock at a propagation speed of Velocity, so the tomographic imaging of the refracted wave travel time can obtain the velocity cloud map of the surrounding rock, combined with the comprehensive interpretati...

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 proposes a first-arrival tomographic imaging method of transmitted seismic waves in surrounding rocks of a coal mine working face, specifically a multi-directional anisotropic full-variation regularized tomographic imaging method. It mainly includes the following steps: first, pick up the first arrival of the transmitted seismic wave; then, read the coordinates of the shot point and the receiver point to establish the transmitted wave observation system, and divide the observation area into a grid, and obtain the ray length matrix in the grid; finally , use the Split-Bregman iterative algorithm to solve the multi-directional anisotropic total variation regularization objective function, obtain the velocity cloud map in the working face, combine the revealed geological data of the working face for comprehensive interpretation, and draw the geological hazards in the working face Distribution. Compared with the algebraic iteration method and the combined iterative reconstruction method of conventional tomographic imaging methods, the present invention has the characteristics of high imaging precision, fast calculation speed, and is more suitable for actual data processing.

Description

technical field [0001] The invention relates to a first-to-multi-directional full-variation regularization tomography method of transmitted seismic waves transmitted from surrounding rocks of a coal mine working face, and belongs to the technical field of mine geophysical detection. Background technique [0002] Geological anomalies such as faults, collapse columns, and goafs in coal mine working faces will affect production efficiency and are potential hidden dangers to safe production. At present, with the development of comprehensive mechanized mining technology, it is urgent to find out the geological anomalies in the working face and its surrounding rocks. Due to the low accuracy of ground seismic exploration, there is a large gap between the requirements of safe and efficient production in coal mines. However, transmission seismic exploration in the working face can more accurately identify geological anomalies in the working face and provide geological guarantee for s...

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): G01V1/30G01V1/36
CPCG01V1/302G01V1/36G01V2210/41
Inventor 陈波朱国维武延辉
Owner CHINA UNIV OF MINING & TECH (BEIJING)
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap 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