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| Study on the failure mode of stage backfill stope due to mining disturbance |
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Received:March 19, 2023
Revised:March 26, 2023
Accepted:March 28, 2023
Published Online:March 24, 2025
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| DOI： |
| KeyWord:mining disturbance; stage backfill; stope; failure mode; numerical analysis |
| Author | Institution |
| JIA Shang-wei |
Henan Province Rock and Mineral Testing Center |
| HE Fu-ling |
Henan Province Rock and Mineral Testing Center |
| WANG Hai-yang |
Henan Institute of Geophysical and Space Information |
| XU Zhuang-fei |
Shandong Gold Mining Linglong Co,Ltd |
| XIE Yan-lin |
Henan Province Rock and Mineral Testing Center |
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| Abstract: |
| In order to systematically study the causes of accidents in the stage subsequent filling stope, taking Hemushan Iron Mine as the engineering background, the numerical simulation analysis combined with the field monitoring method was used to study the stress state, displacement deformation and plastic zone variation characteristics of the ore and rock mass during the excavation disturbance process of the filling stope under the SBF mode. The results show that the mining disturbance activity has obvious regional characteristics on the surrounding rock and surrounding roadway of SBF stope, and the maximum excavation effect area appears around the surrounding rock and panel pillar. During the excavation of the second section, the vertical displacement increment of the roof of the room is the most, and the stress concentration of the pillar is easy to form shear slip failure during the excavation of the third section. At the same time, it also makes the ore body adjacent to the goaf show a tensile failure trend. It is concluded that the surrounding rock of the roof of the SBF stope is mainly tensile shear zone, and the pillar is obviously sheared. Finally, the failure mode of the SBF stope is obtained. Through the field monitoring results, the conclusion of numerical analysis is proved. The research conclusions not only help to fully understand the failure law and mechanism of SBF stope, but also clarify the location of potential hazard sources in the stope of stage subsequent filling mining method, and provide reference for other similar mines. |
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