基于小波去噪和尖点突变理论的沉陷区稳定性分析及土地复垦措施建议

Subsidence Area Stability Analysis and Land Reclamation Measures Proposal Based on Wavelet Denoising and Cusp Catastrophic Theory

通过分析采煤沉陷区地表变形的特点,提出小波去噪及尖点突变理论进行稳定性评价的方法。首先,利用小波去噪对地表位移序列进行去噪处理,并对比不同去噪参数的去噪效果,得到各变形序列的最优去噪结果;其次,利用尖点突变理论对去噪后序列进行稳定评价,以判断沉陷区地表变形的稳定性;最后,对沉陷区的土地复垦措施进行研究,提出相应的复垦措施。通过实例检验,得出不同变形序列的最优去噪参数具有差异性,通过试算法确定最优参数的方法是可行且有效的;同时,尖点突变理论能对沉陷区的地表稳定性进行有效评价,具有操作简单、实用性强等优点,其评价结果为沉陷区的土地复垦工作提供了依据。

Through coal mining subsidence area surface deformation features analysis,put forward a stability assessment method based on wavelet denoising and cusp catastrophic theory.At first,using wavelet denoising carried out denoising for surface displacement sequence,and compared denoising effects from different denoising parameters,obtained optimal denoising result of each deformation sequence.Then,using cusp catastrophic theory stability assessment for sequences after denoising judged subsidence area surface deformation stability.Finally,carried out study on subsidence area land reclamation issue,put forward corresponding measures.Through case study examination,find out the differentiation in different deformation sequence optimal denoising parameters,through tried-and true to determine optimal parameters are feasible and effective.Meanwhile,cusp catastrophic theory can carry out effective assessment for subsidence area surface stability with advantages of simple operation and strong practicability;the assessed results have provided the basis for subsidence area land reclamation works.