Dynamic induction simulation device for broken surrounding rock grouting reinforcement, and testing method therefor

Abstract

The invention discloses a dynamic induction simulation device for broken surrounding rock grouting reinforcement, and a testing method therefor. The device consists of a test piece die, a grouting container, a high-pressure oxygen pressurizer, a sensing apparatus, a dynamic monitoring control system, and other main parts. The simulation of broken surrounding rocks in underground construction is achieved through the combination of mashed rock particles with different diameters. The dynamic monitoring control system is used for the real-time monitoring and control of grouting pressure, so as to enable the grouting pressure to remain steady. An osmotic pressure sensor and a flow sensor are used for the measurement of the osmotic pressure and flow of a rock mass, thereby providing data support for subsequent research.

Description

technical field [0001] The invention belongs to the technical field of safety in underground engineering, and in particular relates to a research experiment on the grouting reinforcement effect of various factors of grouting schemes in underground engineering on broken surrounding rock. Background technique [0002] The fracture of the surrounding rocks around the chamber caused by the excavation of the underground engineering, and the natural surrounding rock fracture zone that the underground engineering passes through, will pose a great threat to the safety of the underground engineering. Not only the broken surrounding rock may fall off and hurt the staff, but also the strength of the surrounding rock itself is an important part of maintaining the stability of the underground project. The insufficient strength caused by the crushing of the surrounding rock will lead to excessive deformation of the underground project and failure of the supporting structure, which is harmf...

AI Technical Summary

Problems solved by technology

[0004] (1) The size of the test piece is required to be relatively large, and it is not possible to simulate relatively broken or extremely broken rock mass;

[0005] (2) The existing device is not easy to control the pressure, and the test error is relatively large;

[0006] (3) The existing device cannot measure the pressure change when the grout penetrates into the rock mass

[0007] At present, there is no published test device that can better simulate the relatively broken surrounding rock in underground engineering, accurately control the grouting pressure and monitor the seepage pressure of the broken rock mass.

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