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| Spatial variability analysis of talus slope deformation caused by unloading |
| RUAN Yongfen1, LIU Kewen2, GAO Bingxun3, HUANG Xingzhou4 |
| 1.Faculty of Architectural Engineering, Kunming University of Science and Technology, Kunming, Yunnan 650500, China; 2.The 14th Metallurgical Construction Corporation, Yunnan Survey and Design Co. Ltd., Kunming, Yunnan 650031, China; 3.Southwest Non-ferrous Exploration Design Co. Ltd., Kunming, Yunnan 650051, China; 4.Department of physics, Baoshan College, Baoshan, Yunnan 675800, China |
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Abstract The analysis of time variability of talus slope under its unloading process is conducted by the geostatistics theory and genetic algorithm to fit the spatial variation function. The grid processing for the actual observation point layout is carried out by using angle error limit and range error limit, then the variation function of each direction is calculated, furthermore variability analysis for talus slope under the unloading condition is carried out; meanwhile, the directional synthetic variance index is constructed. By the analysis of the maximum variability in the direction, its displacement change should be carefully detected. The negative weight of ordinary Kriging equations is corrected by the eutropy theory, and then the ordinary Kriging estimation of estimated point displacement of accumulation body slope under the unloading process is carried out. The theory of the proposed deformation of slope unloading to the actual monitoring data analysis of spatial variability, and the theoretical results fit well with the actual monitoring results. This model is proved to be correct and feasible of the theory, also it provides a new idea and train of thought for the deformation analysis.
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Received: 09 February 2015
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