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| Analysis of surface movement with large-scale mining in Sanshandao Northern sea area gold Mine |
| Received:July 22, 2020 Revised:July 29, 2020 |
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| DOI： |
| KeyWord:Submarine mining, crown pillar, numerical simulation, surface movement |
| Author | Institution |
| CHEN Xiaowei |
中国恩菲工程技术有限公司 |
| FAN Wenlu |
中国恩菲工程技术有限公司 |
| CAI Guanghui |
莱州市瑞海矿业有限公司 |
| XU Xingbao |
莱州市瑞海矿业有限公司 |
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| Abstract: |
| Sanshandao northern sea area gold mine is a submarine deposit with designed productive capacity of 12000 t/d. Submarine mining is technically difficult and always comes with high-risk. High-intensity submarine mining and the poor crown pillar will cause seabed subsidence deformation, further leading to a huge risk of underground mine seawater intrusion. According to the mining technical conditions of Sanshandao northern and under the limited rock mechanics parameters, the surface movement in Sanshandao northern with upward filling mining method were simulated and analyzed by numerical simulation. The study showed that the maximum value of surface subsidence was mainly distributed in the region of hanging wall. With the mining of ore-body from deep to the shallow area, the surface subsidence deformation increased constantly. It was suggested that 160 m crown pillar should be reserved to ensure the safety of submarine mining. |
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