Identification of footwalls and roofs of coal seams in underground coal mines using borehole radar

LIU Si-Xin; SHI Wei; SONG Zi-Hao; CHEN Chun-Lin; DAI Zheng

doi:10.11720/wtyht.2023.1392

2023 Vol. 47, No. 2

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Article navigation > Geophysical and Geochemical Exploration > 2023 > 47(2): 365-371

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LIU Si-Xin, SHI Wei, SONG Zi-Hao, CHEN Chun-Lin, DAI Zheng. 2023. Identification of footwalls and roofs of coal seams in underground coal mines using borehole radar. Geophysical and Geochemical Exploration, 47(2): 365-371. doi: 10.11720/wtyht.2023.1392

Citation:

LIU Si-Xin, SHI Wei, SONG Zi-Hao, CHEN Chun-Lin, DAI Zheng. 2023. Identification of footwalls and roofs of coal seams in underground coal mines using borehole radar. Geophysical and Geochemical Exploration, 47(2): 365-371. doi: 10.11720/wtyht.2023.1392

Identification of footwalls and roofs of coal seams in underground coal mines using borehole radar

College of Geo-exploration Science and Technology, Jilin University, Changchun 130026, China

Received Date: 15 August 2022

Revised Date: 20 April 2023

Publish Date: 27 April 2023

Abstract

Abstract

In coal mining, the accurate determination of the locations of the footwalls and roofs of coal seams and the identification of the geological structures that threaten the safety of excavation are important measures to ensure safe coal mining. This study proposed a technique for detecting the footwalls and roofs of coal seams, which consisted of a mining face-based borehole radar detection method for underground coal mines and a data processing process. Then, this study applied this technique to the Xinyuan coal mine. Specifically, radar profiles were denoised and enhanced through the correction of zero-moment point, DC elimination, band-pass filtering, direct wave removal, and gain processing of measured borehole radar data of boreholes along a mining face of the Xinyuan coal mine. Then, the locations of the roofs and footwalls of coal seams in the underground coal mines were identified and presented through a series of processing and interpretation, including velocity pickup, reflective surface extraction, and diffraction stack migration, as well as time-depth conversion, flipping, splicing, and the correction of borehole trajectories. The technique proposed in this study serves as an effective means for the safe operation of coal mines and thus is of value for promotion.
- borehole radar /
- coal seam /
- reflective surface extraction /
- locations of the top and bottom of coal seams

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References

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