A three-dimensional similar simulation test system for gas-liquid counterflow in goafs of abandoned mines

Abstract

A three-dimensional analog simulation test system for gas-liquid countercurrent in an abandoned mine goaf includes a three-dimensional analog simulation device configured to simulate an analog environment of gas-liquid countercurrent in an abandoned mine goaf, a gas supply system, an automatic water pressure control system and a hydraulic loading system. The three-dimensional analog simulation device includes a reaction frame and a three-dimensional analog simulation chamber. The reaction frame includes a beam, a base and a column for connecting the beam and the base. The three-dimensional analog simulation chamber is arranged inside the reaction frame. The test system can be used to simulate the gas-liquid countercurrent in an abandoned mine goaf so as to study the evolution of water accumulation and gas enrichment in long-term abandonment of closed mines and the migration evolution rules of gas-liquid two-phase in abandoned mines with high gas density.

Description

technical field [0001] The invention relates to the technical field of a goaf simulation test system in an abandoned mine, in particular to a three-dimensional similar simulation test system for gas-liquid counterflow in the goaf of an abandoned mine. Background technique [0002] With the continuous increase of the mining intensity of coal resources in our country, more and more mines will be mined and completed as abandoned mines. According to the prediction of relevant experts, the number of abandoned mines in my country will reach 12,000 in 2020, and will reach 15,000 by 2030. Among them, the gobs of abandoned mines contain abundant resources. It is preliminarily estimated that the coal resources in them are as high as 42 billion tons, and the coalbed methane resources are nearly 500 billion m³. my country has a large number of abandoned mines, rich resources, and great development potential. The good development and utilization of this part of coalbed methane resources ca...

AI Technical Summary

Problems solved by technology

Aiming at the problem of countercurrent flow of gas and water, gas and liquid in the goaf of abandoned mines, the existing single-plane similar simulation system and the traditional similar simulation system without water and gas environment are no longer in line with the actual engineering background, and cannot meet the requirements of gas and liquid in the goaf. Liquid two-phase countercurrent test requirements, so it is urgent to design a three-dimensional similar simulation test system for gas-liquid counterflow in the goaf of abandoned mines, and carry out similar simulation experiments on the evolution of water and gas migration in the goafs of abandoned mines in the laboratory

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