Test system of fluid-solid coupling physical similarity simulation experiment for filling mining

Abstract

The invention discloses a test system of fluid-solid coupling physical similarity simulation experiment for filling mining, which mainly comprises a similar simulation experiment frame, wherein coal and rock stratum similar simulation material, aquifer similar simulation material, water-proof key layer similar simulation material and filling body similar simulation material are laid in the similarsimulation experiment frame. The aquifer consists of a transparent flexible water tank filled with coarse and fine aggregates, one side of the aquifer is connected with a water source supply device to provide stable osmotic pressure for the aquifer utilizing a water pump, and the lower part of the water tank is provided with permeable combined hole devices with adjustable quantity and pore size;the water-proof key layer similar simulation material is mainly prepared from aggregate, an anti-permeability waterproof material and an auxiliary cementing material according to the required similarity ratio; and the filler similar simulation material is selected according to the stress-strain similarity theory. The test system of fluid-solid coupling physical similarity simulation experiment forfilling mining can realize the process of overburden deformation, fissure evolution and seepage and water inrush in the filling and mining under the fluid-solid coupling condition, and has the advantages of simplicity, strong operability, high simulation accuracy and the like.

Description

technical field [0001] The invention belongs to the technical field of a physical similarity simulation test system, and in particular relates to a physical similarity simulation test system for fluid-solid coupling in filling mining. Background technique [0002] In recent years, the development focus of my country's coal resources has gradually shifted to the ecologically fragile and water-shortage mining areas in the west and the deep and complex hydrogeological mining areas in the east. The problem of water conservation and mining is facing huge challenges. As one of the more widely used technologies in green mining, comprehensive mechanized solid filling coal mining technology can realize the safe mining of coal resources under aquifers and water bodies. Theoretical research on surrounding rock fissure field, seepage field and stress field in the process of solid filling mining The evolution characteristics of , are of great significance for scientifically guiding field...

AI Technical Summary

Problems solved by technology

However, at present, most of the physically similar simulation test systems for filling and water-retaining mining use rock formations instead of aquifers, without considering the influence of water seepage. Further research on key water-resistant layers, aquifer deformation and failure, and seepage and water inrush processes

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