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2012 2

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压裂施工 1

地下开采 1

开采地面沉陷 1

微地震法人工裂缝监测 1

最大水平主应力方向 1

第三沉降带 1

自适应神经模糊推理系统 1

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Analysis of spinal lumbar interbody fusion cage subsidence using Taguchi method, finite element analysis

Christopher John NASSAU, N. Scott LITOFSKY, Yuyi LIN

《机械工程前沿（英文）》 2012年第7卷第3期页码 247-255 doi: 10.1007/s11465-012-0335-2

摘要：

Subsidence, when implant penetration induces failure of the vertebral body, occurs commonly after spinal reconstruction. Anterior lumbar interbody fusion (ALIF) cages may subside into the vertebral body and lead to kyphotic deformity. No previous studies have utilized an artificial neural network (ANN) for the design of a spinal interbody fusion cage. In this study, the neural network was applied after initiation from a Taguchi L₁₈ orthogonal design array. Three-dimensional finite element analysis (FEA) was performed to address the resistance to subsidence based on the design changes of the material and cage contact region, including design of the ridges and size of the graft area. The calculated subsidence is derived from the ANN objective function which is defined as the resulting maximum von Mises stress (VMS) on the surface of a simulated bone body after axial compressive loading. The ANN was found to have minimized the bone surface VMS, thereby optimizing the ALIF cage given the design space. Therefore, the Taguchi-FEA-ANN approach can serve as an effective procedure for designing a spinal fusion cage and improving the biomechanical properties.

关键词： anterior lumbar interbody fusion (ALIF) artificial neural network (ANN) finite element interbody cage lumbar interbody fusion subsidence taguchi method

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开采地面沉陷预测的自适应神经模糊推理方法研究

丁德馨,张志军,毕忠伟

《中国工程科学》 2007年第9卷第1期页码 33-39

摘要：

　现行各种开采地面沉陷预测方法均存在着一个共同的缺陷，均不能在集成以往开采地面沉陷工程实例的基础上对某一地下采矿工程所引起的地面沉陷进行预测，而只能根据某种物理的或力学的方法对其进行预测。人类在工程实践中所创造的开采地面沉陷方面的经验是非常宝贵的财富，应当在建立开采地面沉陷预测方法时加以充分利用。以所收集的开采地面沉陷工程实例为基础现行各种开采地面沉陷预测方法均存在着一个共同的缺陷，均不能在集成以往开采地面沉陷工程实例的基础上对某一地下采矿工程所引起的地面沉陷进行预测，而只能根据某种物理的或力学的

关键词：地下开采开采地面沉陷自适应神经模糊推理系统

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第三沉降带应力场研究

闫治涛,刘建中,邱金平, 金丽华

《中国工程科学》 2009年第11卷第2期页码 33-35

摘要：

介绍了第三沉降带的分布，监测得出的大量人工裂缝方向数据及由人工裂缝方向数据统计得出的最大水平主应力方向。结果表明，第三沉降带由北向南绵延１５００ km，最大水平主应力方向大体稳定，分布在５５°～７５° NE范围，多为６５° NE。由监测结果可以判断，第三沉降带的构造应力方向是南亚板块及菲律宾板块共同作用的结果。

关键词：微地震法人工裂缝监测第三沉降带最大水平主应力方向压裂施工

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Image analysis of soil failure on defective underground pipe due to cyclic water supply and drainage using X-ray CT

Toshifumi MUKUNOKI, Naoko KUMANO, Jun OTANI

《结构与土木工程前沿（英文）》 2012年第6卷第2期页码 85-100 doi: 10.1007/s11709-012-0159-5

摘要： The ground subsidence on the underground pipe often is caused with the reduction of the effective stress and the loss of suction in the base course and then, soil drainage into the pipe. The final formation of the cavity growth in the ground was observed as the ground subsidence. Authors focused this problem and hence performed model tests with water-inflow and drainage cycle in the model ground. The mechanism of cavity generation in the model ground was observed using an X-ray Computed Tomography (CT) scanner. In those studies, water was supplied into the model grounds from the defected underground pipe model in case of the change of relative density and grain size distribution. As results, it was observed that the loosening area was generated from the defected part with water-inflow and some of the soil particles in the ground were drained into the underground pipe through the defected part. And afterward, the cavity was generated just above the defected part of the model pipe in the ground. Based on this observation, it might be said that the bulk density of soil around the defected pipe played one of key factor to generate the cavity in the ground. Moreover, the dimension of the defected part should be related to the magnification of the ground subsidence, in particular, crack width on a sewerage pipe and particle size would be the quantitative factor to evaluate the magnification of the ground subsidence. ?In this paper, it was concluded that the low relative density of soil would become the critical factor to cause the fatal failure of model ground if the maximum grain size was close to the dimension of crack width of defective part. The fatal collapse of the ground with high relative density more than 80% would be avoided in a few cycles of water inflow and soil drainage.

关键词： relative density grain property model test road subsidence underground pipe image processing X-ray CT