Dynamic water quicksand stratum reinforcement grouting diffusion rule visual simulation experimental device and method

Abstract

The invention discloses a dynamic water quicksand stratum reinforcement grouting diffusion rule visual simulation experimental device and method. The device comprises an experimental box, a hydraulic pressure control loading system, a vertical hydraulic loading mechanism and a lateral hydraulic loading mechanism, a double liquid chemical grouting system and a test system connected to a computer. The method adopts an engineering geomechanical experimental model with a coal measure stratum physical analog simulation material, a waterproof stratum and an aquifer of certain height filled in the experimental box, aquifer grouting and water-plugging reinforcement visual physical simulation test is carried out hermetically under the conditions of circulating dynamic water pressure and vertical and horizontal lateral stress to acquire or quantitatively describe and analyze the diffusion rule of double liquid chemical grout in the water-bearing sandstone layer or quicksand layer, thus realizing visual simulation experiment of the double liquid component chemical grouting and water-plugging process under a similar water burst or water inrush condition. The method can effectively recognize and reveal the slurry diffusion and consolidation characteristics under a mining dynamic water condition, determine rational grouting and water-plugging parameters, and evaluate the grouting effect.

Description

technical field [0001] The invention relates to a visual simulation experiment device and method for the grouting diffusion law of dynamic water flowing sand stratum reinforcement in a coal mine, which can better simulate the deformation and destruction law of the surrounding rock body in the quicksand layer section of the coal mine shaft engineering, and the water blocking mechanism and control effect of chemical grouting reinforcement. It belongs to the field of mine surrounding rock disaster prevention and control. Background technique [0002] As the mining depth of underground coal mines increases and the engineering geological environment deteriorates, unfavorable (harmful) strata such as water gushing, quicksand, and silt are often encountered, which can easily lead to roadway roof collapse, slabs, roof caving, and subsidence deformation of permanent support , resulting in further deterioration of the excavation construction conditions and extremely difficult construc...

AI Technical Summary

Problems solved by technology

[0002] As the mining depth of underground coal mines increases and the engineering geological environment deteriorates, unfavorable (harmful) strata such as water gushing, quicksand, and silt are often encountered, which can easily lead to roadway roof collapse, slabs, roof caving, and permanent support subsidence deformation , resulting in further deterioration of the excavation construction conditions and extremely difficult construction

At the same time, the joints, mining fissures, and unfavorable geological structures in the surrounding rock mass provide good water conduction channels for the groundwater body, which is more likely to cause a sudden increase in the mine water inflow and even cause mine water disasters, which will bring negative impacts on the safe production and normal excavation of the working face. come big challenge

Grouting and water blocking reinforcement has become the main method for the treatment of large-flow water inrush disasters in the field of underground coal mining engineering. Traditional granular grouting materials, such as cement and cement-sodium silicate grouting materials, have poor injectability. Traditional cement grout is easy to dilute and disperse, and it is becoming more and more difficult to meet the needs of engineering; however, chemical grouting materials with low viscosity, good fluidity, can be injected into micro-cracks, and have a large range of setting time adjustment have been used more and more in recent years. In the treatment of underground water gushing projects in coal mines

[0003] Because underground engineering generally has a relatively complex engineering geological structure, for a long time, the grouting reinforcement construction technology has mostly relied on traditional experience. It brings certain difficulties to the determination of grouting parameters and effect evaluation, and there are relatively few studies on the corresponding visual physical model simulation test of grouting process.

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