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《Journal of Shandong University of Science and Technology(Natural Science)》 2015-05
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Prediction of Seabed Settlement Caused by Natural Gas Hydrate Exploitation in South China Sea

Gong Bin;Jiang Yujing;Wang Gang;Huang Na;State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology,Shandong University of Science and Technology;Changzhou Institute of Building Science Co.,Ltd;College of Civil Engineering and Architecture,Shandong University of Science and Technology;  
By using the finite difference software FLAC3 D,the seabed consolidation settlement behavior with different mining methods is simulated under the condition of thermal-stress-fluid three-phase coupling.The ranges of seabed settlement when the heating time was prolonged and the exploitation temperature was increased were compared.The results of the analysis show that the main area of settlement induced by mining is in a certain range of the mining well and the decrease of NGH layer strength,slightly influenced by NGH decomposition,is mainly caused by production-related drainage.The results also show that in the NGH mining in Shenhu area prolonging heating time has a more obvious influence on the settlement than increasing temperature,namely the influenced area of prolonging heating time is larger than that of improving exploitation temperature.
【Fund】: 国家自然科学基金项目(51279097 51379117 51479108);; 山东省博士后创新项目专项项目(139484);; 山东科技大学研究生科技创新基金项目(YC150303)
【CateGory Index】: TE53
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