Research on the development characteristics of water conducted zone in mining inclined coal seams with rich water in burning area

LIANG Qinghua; DING Xiangjun; YANG Pinqing; WANG Chunyuan

doi:10.19835/j.issn.1008-4495.20230795

Mining Safety & Environmental Protection > 2024 > 51(5): 142-146. > DOI: 10.19835/j.issn.1008-4495.20230795

LIANG Qinghua, DING Xiangjun, YANG Pinqing, WANG Chunyuan. Research on the development characteristics of water conducted zone in mining inclined coal seams with rich water in burning area[J]. Mining Safety & Environmental Protection, 2024, 51(5): 142-146. DOI: 10.19835/j.issn.1008-4495.20230795

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Research on the development characteristics of water conducted zone in mining inclined coal seams with rich water in burning area

LIANG Qinghua^{1, 2,},
DING Xiangjun^{1, 3, ,},
YANG Pinqing⁴,
WANG Chunyuan^{1, 2}

1.
Key Laboratory of Geological Safety of Coastal Urban Underground Space, Ministry of Natural Resources, Qingdao 266101, China
2.
Qingdao University of Technology, Qingdao 266520, China
3.
Qingdao Geo-Engineering Surveying Institute (Qingdao Geological Exploration Development Bureau), Qingdao 266101, China
4.
CCTEG Chongqing Research Institute, Chongqing 400039, China

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Received Date: September 14, 2023
Revised Date: October 11, 2024

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Abstract

Abstract

In order to study the safety issues of coal seam mining under the condition of abundant water in the burning area, it is necessary to accurately analyze the development of the water conducted zone in the mining overlying rock. By using finite element ANSYS simulation calculation and the first strength theory, based on the tensile strength value of the overlying rock layer, the curve range of the first principal stress value at 1.5 MPa was selected as the height range of the water conducted zone development, and verified with the observation of the underground double end sealing method, which is more accurate. It is concluded that the first strength theory can be used as the criterion for the development strength of water-conducting cracks. When the first principal stress value is 1.5 MPa, the development curve of the water conduced zone ranges from 50.17 m to 62.13 m. The upper boundary is not communicated with the burning area, while the lower boundary has communication with the overlying burning area. That is, water accumulation in the burning area is a major water hazard in coal seam mining. At the same time, in the case of inclined coal seams, the height of the development of water conducted zones should be greater at the upper boundary than at the lower boundary. Therefore, when calculating the development of water conducted zones in inclined coal seams, the influence of coal seam dip angle should be considered.
- burning area,
- water conducted zone,
- ANSYS simulation,
- first strength theory,
- coal seam dip angle

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References (21)

References

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