Real-time monitoring system and method for frost heaving deformation expansion of rock ice-containing cracks

Abstract

The invention discloses a real-time monitoring system and method for frost heaving deformation expansion of rock ice-containing cracks. The real-time monitoring system for frost heaving deformation expansion of rock ice-containing cracks comprises a CT scanning system, a rock freezing and thawing system, a crack deformation measuring system and a frost heaving force measuring system. The CT scanning system comprises a vertical rack, an area array detector, an X-ray transmitter, a rotating system and a base. The rock freezing and thawing system comprises a water storage barrel, a freezing barrel and a freezing circulation system, the water storage barrel is located above the freezing barrel, a rock sample is placed in the freezing barrel, the freezing barrel is installed on the rotating system, and the freezing circulation system is connected with the freezing barrel; the fracture deformation measuring system and the frost heaving force measuring system are connected with the rock sample and are respectively used for measuring the deformation condition and the frost heaving force change condition of the rock sample in the freezing process; according to the invention, frost heaving deformation of rock fractures can be measured, and the expansion evolution mesoscopic process of rock ice-containing fractures under the action of freeze-thaw cycle can be observed in real time.

Description

technical field [0001] The invention relates to the technical field of rock mechanics, in particular to a real-time monitoring system and a monitoring method for frost heave deformation expansion of rock ice-containing cracks. Background technique [0002] In the process of mine construction and mineral resource exploitation, the fractured rock mass of the mine slope in the western alpine region has long faced complex freeze-thaw disasters due to the particularity of the environment. Fractured rock mass is a complex type of rock mass. The interior is generally composed of rock particles, cementing materials, micro-cracks, etc. Internal cracks and joint defects directly affect the stability of the rock mass. Under the action of long-term freezing and thawing, fractured rock mass The water-ice phase transition of the fissure water in the body continues, and the frost heave force generated by the 9% volume expansion when the water freezes into ice continues to drive the crack e...

AI Technical Summary

Problems solved by technology

[0004] In the traditional freeze-thaw test, after the temperature is set, the sample is directly put into the constant temperature box for freeze-thaw cycle. After the test, it is taken out for corresponding mechanical tests. Therefore, it is impossible to realize real-time monitoring of the expansion of ice-containing cracks in rocks under the action of freeze-thaw cycles. to observe

[0005] In the publication number CN105334240A, the name is a test device for the amount of frost heaving deformation of rock cracks, which discloses a method that can continuously test the frost heaving deformation of rock mass cracks in the process of frost heaving, and obtain the crack deformation characteristics of different frost heaving stages However, this device can only realize the measurement of frost heave displacement under different freezing conditions, and its functions are too lacking, and it is impossible to observe the internal structure changes of rocks in the process of freezing and thawing in real time.

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