Method and apparatus for identifying collapsed coal column

US10302788B2 · kind B2 · utility

Assignee

• China University of Mining and Technology-Beijing · CN

Inventors

• Jingtao Zhao · Beijing, CN
• Suping Peng · Beijing, CN
• Wenfeng Du · Beijing, CN
• Xiaoting Li · Sichuan, CN

Key dates

• Filing date: Dec 29, 2016
• Grant date: May 28, 2019
• Expiry date: Dec 29, 2036

Classification

• Technology area (CPC G): Physics
• CPC primary: G01V2210/646
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

A coal collapse column identification method and related apparatus that includes acquiring seismic shot gather data in a target region and a seismic wave migration velocity file; calculating a diffraction wave travel time of each piece of single-shot data at different imaging points according to the data; performing Mahalanobis distance calculation processing on each single-shot data and the diffraction wave travel time thereof to acquire a diffraction wave amplitude value sample point of each piece of single-shot data; imaging respectively on a diffraction wave of each piece of single-shot data; and superposing imaging processing results of all the single-shot data corresponding to the seismic shot gather data to obtain a diffraction wave imaging result of the seismic shot gather data so as to facilitate coal collapse column identification according to the diffraction wave imaging result. A diffraction wave corresponding to seismic shot gather data is extracted through a Mahalanobis distance.