Experiment system for simulating grouting effect of old goaf

Abstract

The invention discloses an experiment system for simulating the grouting effect of an old goaf and relates to the technical field of coal mines. The experiment system comprises a main experiment bodydevice, a slurrying device, a grouting volume-grouting pressure double control servo device, a displacement-pressure double control servo device and a control center, wherein the main experiment bodydevice comprises a base, an experiment module, a grouting steel pipe, a cross beam and other parts, and a loading oil cylinder is arranged in the middle of the cross beam and connected with a loadingpress head and controls the loading press head to move vertically; the experiment module is formed by a semi-circular member I and a semi-circular member II through buckling, when moving vertically downwards, the loading press head is completely attached to the inner wall of the experiment module, and a confined space is formed between the loading press head and the experiment module. With adoption of the system, indoor analog simulation for the grouting condition of the old goaf can be performed in advance, and strength of grouting solids after the experiment is detected, so that the groutingreinforcement effect is predicted.

Description

technical field [0001] The invention relates to the technical field of coal mines, in particular to an experimental system for simulating the effect of grouting in old goafs. Background technique [0002] With the development of urbanization, the available building area is getting less and less, and at the same time, the large area of ​​old goaf produced by mining is in an idle state, so the development and utilization of old goaf has become a new direction of urbanization. The treatment of the old goaf has become the premise of utilization, and the most effective treatment method is grouting treatment. However, due to the concealment of underground engineering, in current engineering practice, the effect of grouting in old gobs must be tested by various technical means after the grouting project is completed. When the detection fails to meet the standard, it is necessary to re-drill for secondary grouting , This will not only easily affect the quality of the project, incre...

AI Technical Summary

Problems solved by technology

However, due to the concealment of underground engineering, in current engineering practice, the effect of grouting in old gobs must be tested by various technical means after the grouting project is completed. When the detection fails to meet the standard, it is necessary to re-drill for secondary grouting , this will not only easily affect the quality of the project, increase the construction time, but also waste manpower and material resources

Images