Multifunctional true triaxial flow solid coupling pressure chamber

Abstract

The invention discloses a multifunctional true triaxial flow solid coupling pressure chamber which comprises a barrel, wherein a first pressure chamber bush is arranged at the upper part of the barrel; a second pressure chamber bush is arranged at the lower part; a third pressure chamber bush is arranged at the left part; a fourth pressure chamber bush is arranged at the right part; a load sensor is fixedly connected inside each pressure chamber bush; the load sensors are fixedly connected with centering sleeves; the centering sleeves are fixedly connected with liner plates; the front and rear ends of the barrel are fixedly connected with end covers; oil cylinders are fixed at the outer sides of the end covers; the oil cylinders are connected with servo oil-way devices; cylinder pistons and cylinder piston rods are integrally arranged inside the oil cylinders; cylinder displacement sensors are arranged inside the cylinder pistons; the load sensors are fixed inside the cylinder piston rods; the load sensors are fixedly connected with the centering sleeves, and the centering sleeves are fixedly connected with the liner plates. According to the multifunctional true triaxial flow solid coupling pressure chamber, a real work condition can be more truly simulated, and a theoretical basis is provided for solving on-site problems.

Description

technical field [0001] The invention relates to a test device for studying rock mechanics, seepage mechanics and mine disaster science. Background technique [0002] Coal and gas outburst is an extremely complex dynamic phenomenon that occurs underground in coal mines. It can eject a large amount of coal and gas from the coal body to the mining space in a very short period of time, which seriously threatens the safety and security of coal mines in my country. Miners' lives are safe. Therefore, it is very important to strengthen the research on the mechanism of coal and gas outburst. Studies have shown that coal and gas outburst is the process of shear failure of coal body under the cyclical action of internal and external stress, that is, the internal and external stress induced by changes in the ground stress field, coal rock structure, and gas state and flow due to mining activities. Under the action of external forces, when the coal body is partially fractured and damage...

AI Technical Summary

Problems solved by technology

Deep high temperature and a series of problems caused by it have become a difficult problem in deep mining. At present, the research on the influence of temperature in deep mining is still in the initial and qualitative stage. The main problems are as follows: the real stress environment is not considered; In the constitutive equation of the rock rheological model established under the coupling of temperature and pressure, the consideration of temperature as a linear factor needs to be proved and improved when the temperature field distribution and temperature change have not been specifically clarified; The influence of temperature on transformation lacks quantitative analysis, and no specific parameter equation with general significance has been formed. There is no clear mathematical formula to express the range, degree of influence and mechanism of temperature in brittle-ductile transformation; The calculation of rock mass damage under TM coupling and the relationship between the two types of damage still need further research and proof; for the coupling between temperature-pressure-water-time and the influence form and depth of temperature under the influence of several factors In-depth research is still needed; the study of temperature should focus on the process of dynamic changes, and conduct in-depth analysis from both micro and macro perspectives

Therefore, none of the above equipment can meet the experimental requirements for researching and solving the practical problems faced by coal mines at present and in the future

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