Method for obtaining three-dimensional stress field of rock mass model including complex structural plane

Abstract

The invention relates to a method for obtaining a three-dimensional stress field of a rock mass model including a complex structural plane by using a rapid prototyping technology. The method comprises: (1), a stress frozen fringe value of a rapid prototyping material is measured and an optimal frozen temperature is determined; (2), a rock mass structural plane network system and a rock mass CAD model are generated; (3), rock model checking and printing are carried out; (4), stress freezing is carried out; (5), model slicing is carried out and a stress fringe value is measured; and (6), a rock mass model stress field is reconstructed. According to the invention, on the basis of the complicated building technology of the 3D printer and the photo-elastic measuring technology, two limiting factors that a rock mass model including a complex structural plane can not be manufactured easily and distribution of inner stresses of the rock mass belongs to the black box in the prior art can be eliminated and thus observation and measurement can be carried out by using the common testing means, so that development of the model testing can be promoted. Therefore, the method has the important application value in researches of the rock mass mechanical behavior.

Description

technical field [0001] The invention belongs to the technical field of engineering, and in particular relates to a method for obtaining a three-dimensional stress field of a rock mass model with complex structural planes, which is used in rock mechanics model tests, rock strength analysis, rock fracture extension analysis, and the like. Background technique [0002] The fracture damage of rock mass is closely related to its internal stress field. From the perspective of fracture mechanics and rock fracture, the failure of rock mass is often caused by the expansion, extension and connection of buried structural surfaces such as internal joints and fissures under the action of stress field. Therefore, the acquisition of the stress field of rock mass with complex structural planes, as well as the law of joint action between structural planes and the phenomenon of stress concentration are of great significance for scientific research and engineering applications. Although many ...

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Problems solved by technology

[0004] In order to solve the problem of obtaining the stress field of rock mass with complex structural planes and studying the law of joint action between structural planes and the phenomenon of stress concentration, the present invention combines the complex construction technology of 3D printer and photoelastic testing technology to provide an effective, Feasible test method

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