Deep underground rock excavation effect simulation test device and test method

Abstract

The invention discloses a deep underground rock excavation effect simulation test device and test method, and the device comprises a rock model, a pressure control device and a vacuum control device. The pressure control device comprises a pressure container, and a water inlet mechanism and a water outlet mechanism arranged on two sides of the pressure container; the water inlet mechanism is connected with the high-pressure water pump; the vacuum control device comprises a vacuum machine circuit switching disc arranged at the top of the pressure control device and an inflatable airbag connected with the vacuum machine circuit switching disc; the inflatable air bag is vertically arranged in the middle of the rock model and is connected with an external vacuum machine through the vacuum machine circuit switching disc; the rock model is arranged in the pressure container and comprises a plurality of vertically stacked rock blocks; wherein a plurality of strain gauges are arranged in one rock block, are connected with an external strain gauge and are used for providing real-time strain information in a simulation test process. When the device is used for carrying out a simulation test, a more direct and accurate test basis can be provided for deep mining construction design.

Description

technical field [0001] The invention relates to the technical field of rock-soil medium excavation effect tests, in particular to a deep underground rock excavation effect simulation test device and a test method. Background technique [0002] With the development of underground space development and utilization, deep underground tunnel projects that are related to national security and social development must not only improve their static load resistance, but also resist the destructive effects caused by excavation and unloading disturbances. In practical engineering applications, the unloading effect of excavation in rock and soil is usually evaluated using empirical formulas. However, at present, the industry still lacks a deep understanding of some important characteristics of rock medium excavation and unloading partitions, which makes the current empirical formulas or semi-theoretical and semi-empirical formulas out of the experimental conditions, and the estimated res...

AI Technical Summary

Problems solved by technology

[0003] During deep underground excavation, the movement law in the vicinity of the tunnel and the unloading wave propagation law are the hotspots and difficulties of research. Most of the existing technologies use empirical formulas to predict, considering that the rock-soil medium has cohesive force, internal friction and The dilatancy characteristic, the most important one is the non-linearity of its dynamic behavior, while the research on rock-soil media in the prior art mainly focuses on the stage before failure, and there is little research on the dynamic unloading behavior after failure

Since the stress-strain state after failure is the key to revealing the nature of the rock-soil medium, it is difficult to provide intuitive and accurate test basis for the construction of deep-buried tunnels through the existing technology

Images