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| Simulation Research on the Stability of Plugging Curtain Under Mining Disturbance in Zhongguan Iron Mine |
| Received:June 15, 2018 Revised:July 02, 2018 |
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| DOI： |
| KeyWord:grouting curtain; mining disturbance; numerical simulation; stability analysis |
| Author | Institution |
| 夏冬 |
华北理工大学 |
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| Abstract: |
| Grouting curtain technology can effectively plug groundwater in mine infrastructure and production period is adopted by many large amount of water gushing mines. The underground water in the surrounding rock should be drained at the same time of mining. In order to explore the influence of mining disturbance on stability of water plugging curtain after dewatering, we take the water plugging curtain of Zhongguan Iron Mine as the research object. On the basis of detailed analysis of hydrogeology, engineering geology and the law of water level changes inside and outside the curtain, a three-dimensional geological and mechanical model of water plugging curtain is established. Using the method of numerical simulation to analysis dewatering and mining disturbance’s effect on the stability of water plugging curtain. The results show that: The contact area of water plugging curtain and strong permeable surrounding rock, regions with large differences in stiffness and surrounding rock are easy to form high stress concentration area; the combined influence of dewatering and mining disturbance has a significant effect on the stress distribution in the contact area between water plugging curtain and surrounding rock. The closer the mining boundary away from the curtain, the more significant the influence is. The results provide a basis for monitoring the stability of water plugging curtain. |
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