Surrounding rock deformation experimental device and experimental method

Abstract

The invention provides a surrounding rock deformation device and experiment method. The mechanical characteristics of surrounding rock deformation are studied through model experiments. In addition, the model design, experimental condition selection and multi-factor comprehensive simulation can be better performed, and rock deformation rules under real environment can be effectively reflected. The variation rule of pressure with depth when the geologic body is solidified can be accurately reflected, and the problem that the deformation in the solidification also increases correspondingly when a vertical casting sheet method is used for molding a model material is avoided at the same time.

Description

technical field [0001] The invention relates to an engineering geological body simulation experiment device, in particular to a geotechnical engineering surrounding rock deformation experiment device and an experiment method. Background technique [0002] Rocks are composed of different mineral combinations, and various rocks are the basis of rock mass. The rock mass is a part of the entire geological body. Due to tectonic action, weathering, metamorphism, etc., many structural planes are formed inside the rock mass, which divide the rock mass into rock blocks of various shapes and sizes. The entire rock mass is in a certain initial stress state. It is in a certain relative equilibrium state. [0003] Due to the action of engineering force, the original initial state of the rock mass is destroyed, and the original rock mass within a certain range around the structure is affected. The part of the rock (soil) within the affected range is called the surrounding rock. Before ...

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Problems solved by technology

[0007] In the study of surrounding rock deformation caused by excavation, the horizontal cast plate method is usually used to form the model material, but its vertical height is the same during the preparation process, and there is no difference in depth in terms of physical and mechanical properties, which leads to inability to Correctly reflect the actual displacement direction and relative size

In the invention patent of 201110309194.X, the Institute of Geology and Geophysics, Chinese Academy of Sciences proposed an experimental method and experimental device for simulating the deformation of surrounding rock caused by excavation. The vertical cast plate method is used to carry out the model body in the vertical direction. One-piece molding preparation, so that it can accurately reflect the change of pressure with depth when the geological body is solidified; but because the vertical casting method can only form the model material at one time, and the larger the volume of the model material, the deformation during solidification will increase accordingly , resulting in an impact on the experimental results; at the same time, when generating the excavation contour, the side glass plate needs to be taken out for processing, resulting in no lateral pressure on the model material when generating the excavation contour, so that the experiment affects the test results