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采空区地表动态变化过程受到诸多地质及采矿条件的影响,为研究其细部动态变形过程,结合某矿区地表变形的动态监测资料,基于经验模式分解(EMD)信息提取技术提取地表变形趋势信息能力和相空间重构技术的数据处理特点,提出了地表动态时变规律分析方法:利用EMD技术,提取出地表的时效变形;采用相空间重构技术对时效变形重构相平面,研究地表随时间的沉降演变规律。结果表明,应用该方法可以清晰地分析出地表随时间变化过程中细部动力学过程,得出地表变形的时变规律。
In order to study the detail dynamic deformation process, the ground surface dynamic change process of goaf is influenced by many geological and mining conditions. Combined with the dynamic monitoring data of surface deformation in a mining area, the information extraction ability of surface deformation is extracted based on empirical mode decomposition (EMD) And the characteristics of data processing of phase space reconstruction technology, a dynamic time-varying analysis method of the ground surface is put forward. The time-dependent deformation of the earth’s surface is extracted by using the EMD technique. The phase space reconstruction technique is used to reconstruct the age- The law of settlement evolution. The results show that this method can be used to clearly analyze the detailed dynamic process of the ground surface with time, and obtain the time-varying law of surface deformation.