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| Research on Pressure Relief Technology of Seam-Cutting in Xichuan Coal Mine |
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Received:December 01, 2023
Revised:December 16, 2023
Accepted:December 19, 2023
Published Online:March 24, 2025
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| DOI： |
| KeyWord:roof cutting; stress function method; stress distribution; numerical simulation |
| Author | Institution |
| LIU Bo |
Huaneng Tongchuan Zhaojin Coal Power Co,Ltd,Xichuan Coal Mine Branch |
| ZHANG Lei |
Huaneng Coal Technology Research Co,Ltd |
| YI Wei |
Huaneng Tongchuan Zhaojin Coal Power Co,Ltd,Xichuan Coal Mine Branch |
| WANG Yilong |
Huaneng Coal Technology Research Co,Ltd |
| HU Tao |
Huaneng Tongchuan Zhaojin Coal Power Co,Ltd,Xichuan Coal Mine Branch |
| GENG Huale |
Huaneng Coal Industry Co,Ltd |
| LIU Chengbo |
Huaneng Tongchuan Zhaojin Coal Power Co,Ltd,Xichuan Coal Mine Branch |
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| Abstract: |
| As a widely recognized and effective roadway support method, the top-cutting pressure relief technology plays an active role in improving the stress distribution in roadway and alleviating the deformation of surrounding rock. In order to solve the stress problem faced by 1123 transportation roadway in Xichuan Coal mine and reduce the demand of surrounding rock deformation, the technology of drilling into joint and cutting the top pressure relief is put forward. The upper and lower thresholds of boreholes suitable for this coal mine are calculated by stress function method, which are 14.14 and 6.32 respectively. The caving state of the roof under different hole spacing is analyzed by numerical simulation software, and the stress distribution of solid coal before and after cutting the top is explored. The research results show that the technology of cutting the top and relieving pressure can significantly improve the caving property of the roof and effectively prevent the occurrence of rock burst. At the same time, the technology can effectively reduce the proportion of stress transfer, so that the peak stress in solid coal is reduced by 25.44%, and the peak point is pushed in 179.18%.This research result provides a strong reference for the selection of small coal pillar retaining and supporting methods. |
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