Stress and displacement continuous measuring method for coal mine similar simulation experiments

Abstract

The invention discloses a stress and displacement continuous measuring method for coal mine similar simulation experiments.The method comprises the steps that on the basis of a similar simulation experiment model, under the effect of similar simulation experiment loads, stress and displacement changes of a model rock stratum before breaking are automatically and continuously measured and recorded, and whole-process data measurement of stress and displacement of a similar simulation model overlying rock layer before breaking is achieved.According to the adopted similar simulation model, the structure is simple, use is convenient, stress and displacement measurement is accurate and reliable, stress and displacement change whole-process data of the model rock layer before breaking is automatically and continuously measured and recorded in the similar simulation experiment process, and an early-stage theoretical foundation is provided for coal mine design mining construction.

Description

technical field [0001] The invention relates to a stress-displacement continuous measurement method used for similar simulation experiments in coal mines. Background technique [0002] Similarity simulation is to use single or mixed similar materials indoors to make a similar model according to the principle of similarity, and the model is shaped according to the simulated prototype. When conducting simulation experiments, the scale is usually reduced or enlarged in some special cases to make the model. Through the observation of the stress displacement of the model rock formation, we can understand and judge the mechanical phenomena and the change law of the movement of the rock formation on the prototype or entity, so as to provide a basis for the selection of mining engineering design and construction scheme. [0003] Generally, the stress of the model rock formation is measured by the strain gauge, and the strain gauge is calculated as the stress by measuring the strain...

AI Technical Summary

Problems solved by technology

Manually arranging measuring points will produce artificial errors in the arrangement of measuring points, and at the same time, only the displacement change value at the measuring point can be obtained; secondly, the movement of the rock formation is a process of continuous change, and the interval measurement of the total station cannot be used to measure the model rock formation. Continuous monitoring of displacement during the whole movement before breaking

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