Fault water outburst and mud outburst simulation equipment and test method

Abstract

The invention relates to fault water outburst and mud outburst simulation equipment and a test method. The equipment comprises a shell, an axial loading system, a water pressure loading system, a confining pressure loading system and a fault mold, wherein the lower part of the shell is provided with an outlet portion, and the outlet portion is provided with a baffle plate provided with a plurality of holes; the axial loading system is used for carrying out axial loading on a filling medium of a fault and comprises a pressure head; the water pressure loading system is used for applying water pressure to the filling medium, and comprises a water inlet passage which penetrates through the internal part of the head pressure and is connected to a pressure chamber; the confining pressure loading system is used for applying confining pressure to the filling medium, and comprises an annular hydraulic chamber which is arranged in the shell along the circumferential direction, and the inner wall of the annular hydraulic chamber is made of an elastic material; the fault mold is arranged in an elastic annular sleeve in the pressure chamber, the outer wall of the fault mold is tightly attached to the inner wall of the annular hydraulic chamber, and the internal part form a space used for accommodating the filling medium of the fault; the oil storage amount in the annular cavity is increased so as to enable the inner wall of the annular cavity to expand inwards, the filling medium is extruded through the fault mold, and thus applying of the confining pressure is realized.

Description

Technical field [0001] The invention belongs to the technical field of underground engineering and geotechnical engineering test instruments, and specifically relates to a fault water inrush and mud inrush simulation equipment and a test method. Background technique [0002] Faults and their fracture zones are the most common and one of the most complex bad geological bodies in the construction of tunnels and underground projects. Similar engineering geological problems that occur during the construction of tunnels and underground projects are also extremely complex and serious, including fault fracture zones. The instability, collapse, water gushing, deformation and other problems of surrounding rock seriously threaten the construction progress of the tunnel and the personal safety of the constructors. Therefore, it is very important to study the starting conditions of fault water inrush, the overall stress state and the mechanism of water inrush and mud inrush. [0003] The occu...

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Problems solved by technology

However, due to the complex mechanical properties of the formation process of water and mud inrush in the fault fracture zone, the analysis of the formation mechanism is difficult, the consequences of the disaster are serious, and the medium is loose and broken, the traditional instruments and equipment cannot meet the requirements of the model test

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