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| Study on stability analysis and management measures of airspace based on Mathews" stability graphical method and numerical simulation method |
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Received:August 27, 2024
Revised:September 20, 2024
Accepted:October 28, 2024
Published Online:August 05, 2025
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| DOI： |
| KeyWord:Stability of mining airspace; Numerical simulation; Mathews stability graphical method; Stability judging criteria; Safety evaluation grading; Airspace treatment measures |
| Author | Institution |
| Sun Jinhui |
Mining Research Institute of Yunnan Copper Industry Company Limited,Kunming |
| Yu Yunlin |
Yunnan Yalong Mining Technology Co,Ltd,Yunnan |
| Tang fei |
Mining Research Institute of Yunnan Copper Industry Company Limited,Kunming |
| Wang Yunfeng |
Mining Research Institute of Yunnan Copper Industry Company Limited,Kunming |
| 侯克鹏 |
Kunming University of Science and Technology |
| Cheng Yon |
Yunnan Yalong Mining Technology Co,Ltd,Yunnan |
| Yang Bajiu |
Yunnan Yalong Mining Technology Co,Ltd,Yunnan |
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| Abstract: |
| The stability analysis of the mining airspace is one of the important bases for underground engineering design study. In order to study the stability of the mining airspace left over from the history of this mine, combined with the survey results of the mining airspace in the mine, firstly, the Mathews stability graphic method was used to calculate the permissible hydraulic radius of the mining airspace in different middle sections of the mine and under different lithological conditions, and the results of the calculations were classified into three categories of stable zone, transition zone, collapse zone, and so on, and the stability state of each airspace was judged. Then, the three-dimensional geological modeling system was used to organize and summarize the morphology of the ore body and the morphology of the empty zone, according to which a three-dimensional numerical analysis model was established, and the calculation parameters required for the simulation analysis were obtained through rock mechanics experiments, and numerical simulation analyses were carried out with the FLAC3D software, and the rock damage theory-Mohr Coulomb criterion, displacement tolerance criterion, and plastic zone penetration method were used to evaluate the stability of the mining empty zone. The stability of each mining zone was evaluated by using the theory of rock damage-Mohr Coulomb criterion, displacement tolerance criterion, and plastic zone penetration method, and the calculation results of the stability of the mining zone were classified into three categories, such as stable, basically stable and unstable. Finally, the calculated results of Mathews" stability graphic method and numerical simulation analysis results were integrated, and the danger evaluation of the air-mining zone of Zongyangla Copper Mine was carried out with reference to the “Technical Regulations for the Safety of Air-mining Zones of Metallic and Nonmetallic Underground Mines”. After analyzing the results, it is concluded that: the number of airspace zones in class I (very high risk) is 70, with a total proportion of 32.2%; the number of airspace zones in class IV (low risk) is 100, with a total proportion of 45.8%. According to the results of the risk grading of the mining airspace area, the proposed disposal measures of the airspace area can provide a theoretical basis for the resource recovery and prevention of the airspace area of the mine, and at the same time, the method of the stability analysis of the airspace area, the evaluation criteria, and the treatment measures have a certain value of reference for the management of the airspace area of the similar mines, and the analysis of airspace area stability of the similar scientific research projects. |
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