China University of Mining and Technology (CUMT)

Beijing Ivy Technology Co. Ltd.

Wenfeng Du

Suping Peng

Jingtao Zhao

Xiaoqin Cui

Pan Wang

Xianlei Xu

Pingjie Fu

Xiaoting Li

Feisheng Feng

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.

Method and apparatus for identifying collapsed coal column

A method and a device for detecting a discontinuous body with ground penetrating radar, comprising acquiring a ground penetrating radar signal of a predefined underground space, where the ground penetrating radar signal carries discontinuous information about an electrical parameter of the underground space; determining, from multiple preset dip angles, a target dip angle of the ground penetrating radar signal with respect to each of multiple channels to be scanned, by a target scanning algorithm; separating the ground penetrating radar signal according to the target dip angle, to obtain a scattered wave; performing velocity continuation analysis on the scattered wave, to obtain a focusing velocity of the scattered wave; and imaging the scattered wave according to the scattered wave and the focusing velocity, to obtain an imaging result, where the imaging result is used to determine distribution information of the discontinuous body in the predefined underground space.

Method and device for detecting discontinuous body with ground penetrating radar

The present disclosure discloses a fracture AVO inversion method for a fractured medium, wherein, said method includes: acquiring seismic data from the fractured medium; obtaining a reflection coefficient of the fractured medium, by an AVO inversion for the seismic data based on a newly-built equation. The present disclosure also provides a fracture AVO inversion apparatus and device for a fractured medium. The present invention can flexibly and accurately obtain properties of a fractured medium with impedance contrast (rock properties of the host media plus properties of thee fracture).

Method, apparatus and device of fracture AVO inversion for fractured medium

The invention discloses a real-time water-level monitoring system for a dumping site of an open-pit coal mine. The dumping site of the open-pit coal mine comprises an aboveground part and an underground part, where the aboveground part is a stacking site () located above an original ground surface. The real-time water-level monitoring system for a dumping site of an open-pit coal mine comprises a first measuring well () and a second measuring well (), where the first measuring well () is arranged vertically in the center of the stacking site (), and the second measuring well () includes a vertical section (), a horizontal section (), and a free section () connected in sequence; and a first water-impermeable layer (), a second water-impermeable layer (), and a third water-impermeable layer () are provided internally in the stacking site ().

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Beijing, China

Wenfeng Du