Heat-water-force combined action rock statistical damage calculation method and application thereof

Abstract

The invention provides a heat-water-force combined action rock statistical damage calculation method, and also provides a test device applying the calculation method. The device comprises a high-temperature heating device (less than 100 DEG C), a seepage device, a pressure chamber, a base test board, a pressure applying element, a top plate, a stress detection element, a strain detection element, a temperature detection element, a water flow detection element and an automatic detection data acquisition device. According to the method, the calculation process is complex, the method has high comprehensiveness, the method is applied to the rock triaxial compression seepage test, compared with an existing model, the provided new model is high in comprehensiveness and applicability, and the fitting degree of a stress-strain curve obtained through the test is high. The deformation and failure characteristics of the rock under the action of different temperatures are reflected, the trend of the post-peak stage is fully reflected, and the stress-strain relationship of the high-temperature rock under the triaxial compression-seepage coupling test condition can be well reflected.

Description

technical field [0001] The invention relates to the technical field of rock statistical damage model calculation methods, in particular to a rock statistical damage calculation method and its application under the joint action of heat, water and force. Background technique [0002] With the continuous development of high-temperature rock mass and underground engineering construction such as geothermal resource development and deep mineral resource mining, there are more and more related studies on the physical and mechanical properties of high-temperature rocks. Under normal conditions, the action of high temperature will degrade the mechanical properties of rock, thereby affecting its bearing capacity and the stability of rock mass. Therefore, establishing an objective and reasonable constitutive model is the key to understanding and judging the mechanical properties of rock under high temperature. [0003] For the study of the constitutive model, the statistical damage con...

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Problems solved by technology

However, there is little research on the statistical damage constitutive relationship of rocks under high temperature-seepage coupled conditions.

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