Abstract: To further informatize geotechnical engineering, fractal theory is adopted to analyze the stability of rock mass based on displacement monitoring data of slope engineering, excavation engineering and tunnel engineering. The results show that with the development of deformation in geotechnical materials, the fractal dimension of displacement time-series is increasing, and scale-free zone will become increasingly obvious. This phenomenon can be used for the evaluation of rock mass safety and offers references for construction, feedback design and operation of actual engineering.

Key words: stability of rock mass, fractal theory, displacement monitoring, displacement time series