Method for inversion of rock preformed fracture development process

Abstract

The invention discloses a method for inversion of the rock preformed fracture development process. According to the method, a fracture is preformed in a homemade rock test piece and then the rock test piece is placed in a sealed container, injection pressure is applied to the sealed container through a pressurization device such as a single shaft press machine, the injection and discharging of pigments are performed through a pigment injection inlet pipe and a pigment injection outlet pipe which are communicated with a pigment injection inlet and a pigment injection outlet at the bottom of the sealed container, the rock test piece having undergone pigment injection is obtained through the control of parameters such as injection time, and analysis and research are performed by combination with theoretical knowledge of the subject. Compared with the prior art, according to the method, through the process of pigment injection, grid division, slicing, coordinate obtaining and model inversion and the like, the fracture development process and degree in the test piece are presented visually.

Description

technical field [0001] The invention relates to the fields of rock fracture mechanics and deformation monitoring of mine rock mass, in particular to a method for reversing the development process of rock prefabricated cracks. Background technique [0002] Fractured rock mass is a material containing various defects such as micro-cracks, pores and joint fissures, which affect the mechanical properties and permeability characteristics of rock mass. These changes in properties and characteristics greatly affect the safe mining of oil, gas, coal and other mine resources and the safe application of underground space engineering. Therefore, exploring the development of rock fractures and the process of crack propagation is the key to effectively changing the mechanical properties and permeability characteristics of rock mass. [0003] At present, many scholars at home and abroad have developed some devices and methods for observing the development of coal and rock cracks. Patent ...

AI Technical Summary

Problems solved by technology

After the development of rock fissures, the resistivity and water conductivity will change. The existing methods, whether monitoring temperature by infrared radiation, measuring resistivity by high-density electrical method, or inverting the development of fissures by measuring the leakage of water in the sealing section of rock drilling , to a certain extent, affected by environmental factors, engineering background factors, etc., these methods require more equipment, more processes, and more mutual influence of monitoring data. The shape of bulk crack growth

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