Cylindrical horizontal physical simulation test device for coal mine sinking and driving engineering

Abstract

The invention provides a cylindrical horizontal physical simulation test device for coal mine sinking and driving engineering. Each confining pressure loading unit is of a half structure and is formed by connecting and assembling an upper half-round arc plate and a lower half-round arc plate which are completely symmetric through longitudinal flanges and high-strength bolts, the whole device comprises five confining pressure loading units of the half structures in total, and the adjacent half structures are connected through circumferential flanges and high-strength bolts. A loading end cover and a constraining end cover are designed at the two ends of the device and are connected with a cylinder formed by the half structures through high-strength bolts. Radial loading oil cylinders are arranged at equal intervals in the radial direction along the circumference of a confining pressure loading mechanism, wherein two circles of radial loading oil cylinders with the total number of twelve are evenly arranged on each half structure unit, in other words, sixty radial loading oil cylinders are arranged on the five half structures in total. Four axial oil cylinders are arranged on the loading end cover. The integrity and rigidity of the confining pressure structures are improved; besides, the confining pressure loading units of the half structures can carry out independent loading and individual control on test models, and the requirement for tests with different sizes of models with different functions is met.

Description

technical field [0001] The invention relates to the technical field of test equipment, in particular to a cylindrical horizontal coal mine shaft engineering physics simulation test device. Background technique [0002] In the field of geological and geotechnical engineering, in order to study and master the stress distribution inside large-scale underground geotechnical engineering structures, research and explore the support technology and support methods of large-scale underground geotechnical engineering, design and optimize the structure of large-scale underground geotechnical engineering Support design and support parameters require simulation tests and analysis of the stress and deformation distribution inside the large-scale underground geotechnical engineering to be designed and constructed in advance. The physical simulation test system is an important technical means for this kind of research. Coal mine shaft engineering belongs to large-scale underground geotechn...

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Problems solved by technology

Most of the simulation test research devices use two-way pressurization, and a few use triaxial loading. However, the tests carried out are basically plane strain test research, and some of them can be used for triaxial mechanical test research. At present, there are still the following problems: due to the limitations of the test system Due to the limitation of loading level and model size, it is difficult to carry out three-dimensional simulation test or simulation test of large-scale coal mine roadway surrounding rock deformation control; all cubic test devices are loaded in three to six directions, resulting in the interaction between the three-dimensional deformation of the model and the triaxial loading stress. It is difficult to ensure that the boundary conditions of the model meet or continuously meet the boundary conditions of the simulated object during the test; the current test device cannot perform physical simulation tests of geotechnical engineering or shaft engineering under axisymmetric stress conditions

my country's coal system has not yet developed a large-scale test system that can be used for triaxial physical simulation tests of shaft engineering, and urgently needs to be solved

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