Large-size roadway support laboratory simulation system and method

Abstract

The invention discloses a large-size roadway support laboratory simulation system which comprises a large-size roadway support simulation system, a pressurizing transmission system and a support data acquisition system. The large-size roadway support simulation system consists of a large-size roadway appearance simulation mechanism and a support simulation mechanism. The pressurizing transmission system comprises a base, a lateral pressurizing transmission mechanism, an axial pressurizing transmission mechanism, a side pressure power system and an axial pressure power system. The support data acquisition system comprises an axial extensometer, a radial extensometer, a computer, an EDC digital controller and a pressurization controller. The end, exposed to the inside of a rubber ring, of each anchor rod is provided with a sound emission sensor. The invention further discloses a large-size roadway support laboratory simulation method. The system and the method can simulate underground roadway support effect, roadway side deformation and floor heave which are caused under pressure really according tot geological conditions of different mines and can also simulate state of creep instability of the roadway under disturbance.

Description

technical field [0001] The invention belongs to the technical field of coal mine roadway support, and in particular relates to a large-scale roadway support laboratory simulation system and method. Background technique [0002] The mining depth of many mines in my country has exceeded 800 meters. Under the condition of large mining depth, the stress state of the surrounding rock of the roadway is close to the rock strength limit, and the stability of the roadway is poor, and it is easy to produce large deformation due to the disturbance of excavation and mining. The rheological mechanical properties of the roadway under the action of disturbance and the establishment of the roadway disturbance theory have important engineering practical value for deep well soft rock support. Due to the fact that the coal mine roadway is deeply buried underground, the on-site test cannot be carried out. The simulation system in the laboratory can study the deformation, movement and destruction...

AI Technical Summary

Problems solved by technology

[0003] The existing roadway support simulation test bench mainly has the following limitations. First, the model is mainly based on the plane strain model, which cannot study the research object whose three-dimensional stress changes. Second, the model scale is small, which makes the study of large scale The roadway test cannot be realized; the third is that the model cannot study the roadway support form and support parameters and other experiments; the fourth is that the model can only study the roof, floor and two sides of the roadway separately, and cannot conduct experiments on the overall support of the roadway Research; fifthly, the model cannot simulate the impact of roadway disturbance, the coal mine roadway is obviously affected by mining, and the existing test bench mainly loads uniform loads on the simulation device, and cannot simulate the impact and blasting disturbance on the roadway

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