On the topography influence on subsidence due to horizontal underground mining using the influence function method |
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| Institution: | 1. State Key Laboratory of Coal Resources and Safe Mining, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;2. School of Mines, China University of Mining and Technology, Xuzhou, Jiangsu 221116, China;1. Research Centre of Coastal and Urban Geotechnical Engineering, Zhejiang University, Hangzhou, China;2. National Experimental Teaching Demonstration Center of Civil Engineering, East China Jiaotong University, Nanchang, China;3. School of Civil Engineering and Architecture, East China Jiaotong University, Nanchang, China;4. Engineering Research & Development Centre for Underground Technology of Jiangxi Province, Nanchang, China;5. Zhejiang Hanghai Intercity Railway Co., Ltd., Jiaxing, China |
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| Abstract: | The classical influence function method is widely used in mining subsidence prediction, but its use is typically limited to predicting the subsidence associated with horizontal stratiform underground mining when the ground surface is flat. By investigating the topography influence on subsidence under simplified mining conditions, this study attempts to improve the original influence function method to take topographic variations into account. New asymmetrical influence functions are used to simulate element subsidence. Integrating this asymmetrical approach into the influence function method increases the realism of subsidence computation when compared to the numerical simulation results. The maximum subsidence value and influence angle got from field data are introduced into the improved method, then two field subsidence cases are studied and acceptable comparison results are achieved. This improved method should serve as the foundation for future work. |
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| Keywords: | Topography influence Horizontal underground mining Asymmetrical influence function Surface angle Mining depth |
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