Overburden Strata Disturbance The Crack Evolution Scaling Law Achieved Its Fractured The Fractal Interpolation

For the overburden failure and ground settlement,etc,problems caused by theconstruction of rock engineering,like excavation of underground chambers and themining of useful minerals, we use the mining of useful minerals underground as theresearch object,the similar materials for model test, the digital Speckle photography,soil pressure sensors and electronic total station for the analysis of the damagecharacteristics of disturbed overlying strata and fractal,scaling method, groundsettlement and other post-modern mathematics theory to study the feature of fractal andscaling law of disturbed overlying strata,and to achieve the interpolation calculation ofdisturbed overlying strata.The main contents of this study include the following aspects:(1) The disturbed cloud Overburden stress and stress vector has been gotten, byanalyzing the force of overlying rock disturbance,combining similar material modeltest method, and using digital speckle photography. from the starting point ofanalyzing the Stress changes it founds the "trapezoid" distribution. for different stepsOverburden excavation comparative analysis of failure modes,it founds thesimilarity in the mode of the damage of overlying rocks.(2) By studying the evolution of fractal characteristics caused by the mining of theunderground minerals,the self-similarity in the disturbance of overlying rock fracturein spatial and temporal distribution is obtained of self-similarity.and it proposes themethods of determining the damage degrees using fractal dimension. Based onbox-counting method, the application Fractalfox2.0disturbance on-site real shot photosof overburden rock fracture network to calculate the fractal dimension of thedisturbance overburden failure to establish the relationship between the fractaldimension and the degree of damage to overlying strata.(3) It researches on scale issue of overlying rock fissures and calculates the scalinglaws of overburden rock fracture network in stretching transformation.(4) By Combining with fractal interpolation theory, using MATLAB numericalcalculation software,it the disturbance of overlying strata and surface subsidence cracks fractal interpolation, get the fractal dimension and surface disturbance wideOverburden under different mining subsidence maximum. Theoretical studies andengineering required to provide theoretical guidance and data support.