Test method for rock fracture evolution and rupture characteristics

Abstract

The embodiment of the invention provides a test method for rock fracture evolution and rupture characteristics, and relates to the technical field of rock mechanics engineering. The method includes the steps: processing a rock core collected from engineering sites into a plate-shaped sample, spraying a white paint and a black paint on the surface of the sample after the sample is formed successively, and forming an artificial random speckle field; scanning the plate-shaped sample by a CT scanning machine, to obtain internal defect characteristics; carrying out mechanical test on the plate-shaped sample by a rock press, in the process of the mechanical test, adopting an acoustic emission device, a high-speed camera and a digital speckle device, and obtaining acoustic emission evolution characteristics, deformation and rupture characteristics and crack propagation characteristics respectively; and after the plate-shaped sample is destroyed, scanning a rupture surface end port of the plate-shaped sample by an electron microscope, to obtain a rock fracture micro-morphological characteristic sample. The test method for rock fracture evolution and rupture characteristics provided by theembodiment of the invention can enhance the synergy of exploring rock fracture characteristics and rupture mechanism.

Description

Technical field [0001] The invention relates to the technical field of rock mechanics engineering, in particular to a rock fracture evolution and failure characteristic test method. Background technique [0002] The rupture and destruction of surrounding rock is a key problem that plagues my country's hydropower, water conservancy, transportation, and deep ground energy and resource development and utilization. The deep-buried diversion tunnel of the Jinping II Hydropower Station, the Jinping Extremely Deep Dark Matter Underground Laboratory, the Diversion from Han to Wei River, the Baihetan Hydropower Station, the Yima Coal Mine, and the Erdaogou Gold Mine are all frequently encountered in the construction or mining of high stress disasters. It suffers a lot of economic losses due to problems, and the problems of underground engineering damage and disasters under deep high stress cannot be avoided. A large number of engineering practices have shown that the instability of rock ...

AI Technical Summary

Problems solved by technology

The deep-buried diversion tunnel of the Jinping II Hydropower Station, the Extremely Deep Dark Matter Underground Laboratory of Jinping, Yinhanjiwei, Baihetan Hydropower Station, Yima Coal Mine, Erdaogou Gold Mine and other projects have frequently encountered high-stress disasters during construction or mining A large amount of economic losses have been incurred due to these problems, and the damage and disasters of underground engineering under deep high stress cannot be avoided.

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