Three-dimensional model test device for simulating geological disasters of water and mud inrush

Abstract

The invention discloses a three-dimensional model testing apparatus capable of simulating water outburst and mud outburst geological disasters. The apparatus comprises a lower supporting rack, an axial pressure loading device, a peripheral pressure loading device, and a model sample part; the peripheral pressure loading device is arranged on the top of the lower supporting rack and is capable of loading a peripheral pressure onto the model sample by filling high-pressure gas or water into the peripheral chamber through a pressure adjusting valve; the model sample part is arranged in the peripheral pressure loading device, an annular water tank is arranged in a movable pressing plate under the model sample part, a water pressure is loaded on the model sample through a water penetrating plate by filling water into the annular water tank; and the axial pressure loading device is arranged in the lower supporting rack, is connected to the sample model part by going through the bottom of the peripheral pressure loading device, and applies an axial pressure on the model sample through an oil cylinder arranged on the lower end of the axial pressure loading device. The provided apparatus has the advantages of simple whole machine structure, good stability, and convenience for carrying out tests, and can precisely simulate the initial environment of a sample and carry out excavate unloading tests. Through a pre-fabricated model sample, the test period is largely shortened, and the test efficiency is improved.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering tests, and in particular relates to a three-dimensional model test device for simulating geological disasters of water and mud inrush. Background technique [0002] In recent years, the construction of deep and long tunnels in mine tunnels, national defense, water conservancy and hydropower and other underground projects in China has shown a vigorous development trend. Due to the diversity of geological conditions, the causes of disasters and the extremely complex disaster process, it is difficult to grasp the adverse geological conditions in the construction route in the early stage of construction, resulting in major disasters such as water and mud inrush during the construction stage, which seriously threatens the safety of construction personnel and causes huge economic losses. . For example, between 2004 and 2008, 19 large-scale water and mud inrush disasters occurred in Maluqing Tunn...

AI Technical Summary

Problems solved by technology

For the research on obtaining the minimum safe water-resisting rock layer thickness, the research is mainly carried out by simplifying the theoretical model and numerical simulation, but the complex diversity of geological conditions and the uncertainty of rock and soil materials make the existing methods and technologies very suitable for obtaining different surrounding rock types, different There are difficulties in the level of ground stress and the minimum safe water-resisting rock thickness under different water pressure conditions

In particular, no research has been carried out on the acquisition of large-sample probability statistics experiments to obtain the minimum safe water-resisting rock layer thickness

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