Evaluation of density properties of geological system compacted by hydraulic blasting using numerical modeling

Elena О. Tarasenko

Abstract


Engineering and production works on compaction of subsidence geological systems by hydraulic blasting are preceded by preliminary numerical modeling of the density properties of compacted soils in order to reduce financial and time costs. Which determines the relevance of the study. The elimination of the property of soil subsidence is carried out at the stage of designing construction projects, buildings and structures in order to ensure their long-term and safe use. The mathematical model of a geological system compacted by hydraulic blasting is based on a partial differential equation with specified initial and boundary conditions. The paper proposes an approach to numerical modeling of the solution of an initial-boundary value problem for assessing the density properties of compacted soils. The method of finite-difference semi-implicit grid functions is used. Discrete dynamic systems are constructed that take into account the input effects of the parameters of the geological system, the density of the soil before compaction, the power of the explosive charge, the coefficient of vertical diffusion of gas in the soil, the vector of horizontal demolition, the grid step. The solution of the systems is implemented by the sweep method. It allows you to estimate the density properties of soils. It has the second order of accuracy in time and spatial coordinates. It is absolutely stable. A computational experiment was conducted to assess the density properties of soils compacted by hydraulic blasting, based on experimental data from the implementation of natural deep compaction of subsidence soils. Dependences of the density of compacted soil on the depth of the geological strata over time were constructed. The adequacy of the proposed method for assessing the density properties of soils to experimental data was established.


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References


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