Application of Microtremor Detection Method in the 3D Survey of Metal Mined-out Collapse area: An Example of Iron Mined-out Collapse Area in Huoqiu County, Anhui Province

LIAO Sheng-Zhu; WAN Zi-Xuan; JIA Hui-Tao

doi:10.3969/j.issn.2097-0013.2023.04.005

2023 Vol. 39, No. 4

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LIAO Sheng-Zhu, WAN Zi-Xuan, JIA Hui-Tao. 2023. Application of Microtremor Detection Method in the 3D Survey of Metal Mined-out Collapse area: An Example of Iron Mined-out Collapse Area in Huoqiu County, Anhui Province. South China Geology, 39(4): 643-654. doi: 10.3969/j.issn.2097-0013.2023.04.005

Citation:

LIAO Sheng-Zhu, WAN Zi-Xuan, JIA Hui-Tao. 2023. Application of Microtremor Detection Method in the 3D Survey of Metal Mined-out Collapse area: An Example of Iron Mined-out Collapse Area in Huoqiu County, Anhui Province. South China Geology, 39(4): 643-654. doi: 10.3969/j.issn.2097-0013.2023.04.005

Application of Microtremor Detection Method in the 3D Survey of Metal Mined-out Collapse area: An Example of Iron Mined-out Collapse Area in Huoqiu County, Anhui Province

1. Anhui Institute of Geophysical and Geochemical Prospecting Techniques, Hefei 230031, Anhui, China
2. Anhui Shallow Surface Geophysical Engineering Research Center, Hefei 230031, Anhui, China

Received Date: 30 April 2023

Revised Date: 29 July 2023

Abstract

Abstract

The continuous extraction of underground metal minerals would form a large mined-out area, and the collapse and subsidence of this area would pose a direct threat to the safety of people's lives and property. The deep buried depth, complicated geological environment and morphological characteristics make it a challenge to detect the area effectively. Therefore the research on its detection technology is of great practical significance. In this paper, an underground mined-out collapse area in an iron deposit in Huoqiu County, Anhui Province has been studied. The microtremor detection method was used to investigate the mining situation in this area, the possible sources of interference in the area were located and analyzed by using the noise source beamforming method, and the influence of the surrounding human activities on the results of this detection is investigated. The validity of the detection method used was verified; the three-dimensional shear wave velocity structures were constructed by interpolating the data from all the measured points; the spatial distribution of the underground mined-out collapse area and faults was depicted by using the shear wave velocity difference, that the stratigraphic stability of the known mined-out area was deduced and two hidden geological hazard areas were speculated. The survey results show that the microtremor detection method has good technical advantages and application prospects for the detection of metal mining collapse areas and therefore could provide a geophysical basis for the subsequent comprehensive management of the area.
- Metal mining collapse /
- Microtremor survey /
- Dispersion curve /
- Three-dimensional shear wave velocity structures /
- an iron deposit in Huoqiu County

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References

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