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

A technology similar to simulation experiments and measurement methods, applied in the field of continuous measurement of stress and displacement, can solve the problems of unable to model rock formation monitoring, manual errors, etc., and achieve the effects of wide and convenient use, simple production, and high measurement accuracy

Active Publication Date: 2016-07-20
TAIYUAN UNIV OF TECH
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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

Method used

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

Examples

Experimental program
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specific Embodiment approach

[0041] As shown in the accompanying drawing, a similar simulation experiment is implemented to measure the stress-displacement method of the overlying strata of the coal mine, and the method is carried out according to the following steps.

[0042] (1) Fabrication of the measuring unit

[0043] 1) This experiment is to measure and simulate a mine 3 # The change of internal stress and displacement when the overlying strata subsides due to the excavation of the coal seam (25), according to the experimental conditions and prototype conditions, select the existing similar simulation experiment of length × height × width = 1600mm × 1500mm × 200mm in the laboratory platform (18).

[0044] 2) Make the first template (12) and the second template (13) with equal dimensions length×width=1600mm×200mm according to the length and width of the model rock layer laid in the similar simulation experiment.

[0045] 3) Select the size of the resistance strain gauge (14) according to the size o...

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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...

Claims

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Application Information

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IPC IPC(8): G01N33/24
CPCG01N33/24
Inventor 郝兵元张鹏鹏黄小朋刘嘉诚
Owner TAIYUAN UNIV OF TECH
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