Deep rock mass non-linear mechanics experimental equipment

Abstract

The invention relates to a nonlinear mechanical test equipment for a deep rock body, belonging to the mechanical test equipment for the deep rock body in geotechnical engineering. At present, the conventional rock body mechanical test comprises a unidirectional compression test, a unidirectional tension test, a triaxial compression test and a shear test. The force and the mechanical behavior in the action process of the deep rock body have the very close relations with the loading process. The conventional rock body mechanical test modes and equipments can't reflect the special mechanical behavior related to the loading process of the deep rock body. Therefore, the invention adopts the scheme of that each direction of three dimensions of a hydraulic loading device is provided with an independent hydraulic power control device, and combines the corresponding test piece fixture to provide the nonlinear mechanical test equipment which implements the composite stress test for the engineering rock body, particularly for the deep engineering rock body in order to implement the intensive study for the stress state of the engineering rock body in the process of tension and compression, intensity character of tension and shear composite state, constitutive relation and construction.

Description

technical field [0001] The invention relates to a test equipment, which belongs to rock mass mechanics test equipment, in particular to a deep rock mass nonlinear mechanics test equipment. Background technique [0002] The rock (pseudo) triaxial tester, rock direct shear tester and rock true triaxial tester that can only perform three-dimensional compression, which are widely used in the field of rock mechanics, cannot fully and truly reflect the stress state of engineering rock mass. Comparing the test functions and technical indicators of representative rock true triaxial test instruments at home and abroad that can reflect the stress state of engineering rocks, it can be seen that the rock true triaxial test instruments currently used are indeed for research. The new rock mass nonlinear mechanics tester provides a valuable reference, but they cannot be used for composite tests such as tension-compression, tension-shear, etc., and their operability is poor, and the degree ...

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Problems solved by technology

With the development of deep rock mass engineering, a series of new characteristic scientific phenomena have occurred. Compared with shallow rock mass engineering, these characteristic scientific phenomena have obviously different characteristics and cannot be explained satisfactorily by traditional continuum mechanics theory. Caused rockburst, water inrush, large-scale roof fall and goaf instability and other catastrophic accidents intensified to a greater extent, increased in frequency, and the mechanism of disasters became more complicated, which has attracted great attention from rock mechanics experts and scholars at home and abroad. In addition, the mechanical state of engineering rock mass under the complex mechanical environment of "three highs and one disturbance" of high ground stress, high ground temperature, high karst water pressure and strong excavation disturbance is very complicated

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