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Dynamic mechanism for horizontal deformation in part of North China area——Three-dimensional finite-element calculation and analysis of results from GPS remeasurement

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Acta Seismologica Sinica(English Edition) 1999年第1期12卷 55-62页

作者：黄立人马青郭良迁宋惠珍刘洁 The First Crustal deformation Monitoring Center China Seismological Bureau Tianjin China Institute of Geology China Seismological Bureau Beijing China

A deformation monitoring network that covers part of North China area and takes the Beijing region as the center was measured for two times with high precision GPS in 1995 and 1996 respectively. The results from remeasurement indicate that present horizontal movement in the monitored area is characterized by relative motion among several main tectonic blocks. Considering the spatial distribution features obtained from geological survey and results on seismic wave and activity in the area, and stratified features of crustal medium in depth, a three dimensional finite element medium model is designed. And under the conditions of taking and not taking the action manner of the background stress field in the studied area into account, the relative motion between tectonic blocks is calculated and modeled. Based on the results from the analysis and calculations the dynamic mechanism for the present horizontal deformation in the area is discussed.

关键词： GPS measurement horizontal deformation three dimensional finite element

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Characteristics of Recent horizontal Crustal Movement and Tectonic deformation in the Northwest China Region

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Earthquake Research in China 2006年第3期20卷 271-285页

作者： Zhang Xi Liu Wenyi Wang Shuangxu Wang Wenping Zhang Xiaoliang Cui Duxin Xue Fuping The Second Monitoring and Application Center CEA Xi＇ an 710054 China

Making use of observation data of GPS in the Northwest China region and infrared distancemeasurements crossing the Qilian-Longshoushan fault zone up to 2004, aided by the least square collocation and inversion of negative dislocation model for the boundaries of elastic blocks and the singular force-source, the dynamic evolution features of deformation and strain fields before and after the Ms = 8. 1 earthquake on the west of Kunlun Mountains Pass, especially the recent tectonic deformation and stress field status three years after this earthquake are studied. The possible regions or segments of active blocks and their boundaries reflecting accumulation background of high strain energy of producing earthquakes over middle magnitude, are obtained, as well as the potential epicenter. The results show that after shortterm relaxation and adjustment in the northern margin of Qinghai-Xizang （Tibet） block after the Ms = 8. 1 earthquake, the main control action of background field of northeastward pushing of Indian plate is now recovering. Moreover, the following regions are found to have the background of high strain energy accumulation. They are the middle segment of the northern Tianshan fault zone and its meeting region with the western segment, the middle and western segments of southern Tianshan fault zone and the meeting region with Western Kunlun fault zone, the middle segment of Altun fault, the middle-eastern segment of Qilianshan fault zone and its meeting region with Haiyuan fault, the meeting region of northern margin fault of west Qinling Range and the southeastward expanding line of Zhuanglanghe fault; The Linze and Haiynan areas also see accumulation of strain energy to some degree.

关键词： Northwest China Region horizontal deformation Negative dislocation model Seismogenic background Potential epicenter

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Calculation of the Limiting deformation in Stopping-and-Filling by the Finite Element Method and its Influence Upon the Packed Volumn

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Journal of Wuhan University of Technology(Materials Science) 2001年第2期16卷 47-50页

作者：胡建华 School of Rsrc. and Environment Eng. Wuhan University of Technology Wuhan 430070 China

The stability of buildings on the surface will be influenced by underground mining. For the purposes of safe mining and buildings protecting around mining area, the rock and sod distortion should be forecasted. By using the results of the elastic-finite-element method simulation, we can calculate the tilting, horizontal deformation and curvature of the surface and the strata. Wushan Copper Mine was taken as an example to analyze the reasons of accident and beyond standard limit, and the influence on the safety of the packed volumn.

关键词： subsidence tilting horizontal deformation curvature finite element mothod

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Development and application of multi-field coupled high-pressure triaxial apparatus for soil

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地下水科学与工程:英文版 2023年第3期11卷 308-316页

作者： Xiu-yan Wang Lin Sun Shuai-wei Wang Ming-yu Wang Jin-qiu Li Wei-chao Sun Jing-jing Wang Xi Zhu He Di Institute of Hydrogeology and Environmental Geology Chinese Academy of Geological SciencesShijiazhuang 050061China SuperMap Software Co. Ltd.Beijing 100000China

The increasing severity of ground subsidence,ground fissure and other disasters caused by the excessive exploitation of deep underground resources has highlighted the pressing need for effective management.A significant contributing factor to the challenges faced is the inadequacy of existing soil mechanics experimental instruments in providing effective indicators,creating a bottleneck in comprehensively understanding the mechanisms of land *** is urgent to develop a multi-field and multi-functional soil mechanics experimental system to address this *** soil mechanics theories,the existing manufacturing capabilities of triaxial apparatus and the practical demands of the test system,a set of multi-field coupled high-pressure triaxial system is developed tailored for testing deep soils(at depths of approximately 3000 m)and soft *** system incorporates specialized design elements such as high-pressure chamber and horizontal deformation testing *** addition to the conventional triaxial tester functions,its distinctive feature encompass a horizontal deformation tracking measuring device,a water release testing device and temperature control device for the *** ensemble facilitates testing of horizontal and vertical deformation water release and other parameters of samples under a specified stress conditions,at constant or varying temperature ranging from-40℃–90℃.The accuracy of the tested parameters meets the requirements of relevant current *** test system not only provides scientifically robust data for revealing the deformation and failure mechanism of soil subjected to extreme temperature,but also offers critical data support for major engineering projects,deep exploration and mitigation efforts related to soil deformation-induced disaster.

关键词： Multi-field coupled triaxial test High and low temperature horizontal deformation Compressed water release

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