3 results about "Earth tide" patented technology

This invention relates to a method and system for inverting parameters of fractured aquifers in response to groundwater solid tides, comprising the following steps: establishing a mathematical model of the groundwater solid tide response of a fractured aquifer considering both pore and fractured media, and solving the mathematical model to obtain an analytical solution; acquiring hydrological borehole water level data of the fractured aquifer to be estimated, and obtaining the amplitude ratio and phase difference characteristic parameters of the water level response to solid tide stress changes; fitting the analytical solution with the amplitude ratio and phase difference characteristic parameters, and selecting the coefficient of determination R. 2 The parameter value corresponding to the largest fitted curve is used as the inversion result of the fractured aquifer parameters. The dual-medium model can realistically depict the groundwater movement law in the pore-fracture system of the fractured aquifer under solid tide response, and can intuitively understand the influence of the hydrogeological parameters of the dual media in the fractured aquifer on the groundwater solid tide response, providing a more reliable theoretical basis and method for accurate inversion of fractured aquifer parameters.

An earthquake analysis and calculation system based on tidal theory includes a tidal theory calculation module, a fault parameter and stress projection module, an earthquake event import module, and an analysis module. The output of the tidal theory calculation module is connected to the input of the fault parameter and stress projection module, the output of the fault parameter and stress projection module is connected to the input of the earthquake event import module, and the output of the earthquake event import module is connected to the input of the analysis module. The tidal theory calculation module includes input time and spatial parameters and outputs a tidal stress tensor. The fault parameter and stress projection module includes input fault plane parameters and outputs tidal shear stress and normal stress. The earthquake event import module includes inputting earthquake event data and outputting tidal stress and earthquake event data, which are then transferred to the analysis module. The analysis module includes outputting a fused visualization result of tidal stress and earthquake events. This invention integrates solid tidal theory calculation and earthquake analysis.

This invention relates to a method and system for inverting hydrogeological parameters of karst aquifers in mines. The method includes the following steps: constructing a mathematical model of groundwater solid tide response considering the effects of crossflow and well storage under mining conditions, and solving for analytical solutions of the aquifer head amplitude ratio and phase difference under tidal stress; acquiring long-term water level monitoring data from hydrological boreholes in the mining area, and extracting and separating the amplitude ratio and phase difference characteristic parameters of specific wave components of the solid tide; fitting the analytical solution with the extracted amplitude ratio and phase difference characteristic parameters, and introducing a nonlinear least squares optimization algorithm for multi-parameter joint inversion, taking the parameter value corresponding to the fitting curve with the largest coefficient of determination as the final hydrogeological parameter inversion result. By constructing a coupled model that better conforms to the actual mining disturbance conditions and combining it with an optimization algorithm, the problem of multi-parameter inversion is solved, and the inversion accuracy of hydrogeological parameters of deep karst aquifers under mining disturbance is significantly improved.