A large-scale coal gas adsorption and desorption simulation test system

Abstract

The invention provides a simulation test system for gas adsorption and desorption of large-scale coal. The simulation test system comprises a large-scale cavity, a loading system, a gas feeding system, a vacuum pump, a monitoring system of gas adsorption and desorption parameters, wherein the large-scale cavity is composed of a one-side open cavity and a cover plate; the wall of the large-scale cavity is provided with sensor screwed holes; the monitoring system of the gas adsorption and desorption parameters comprises a sensor which penetrates into the large-scale cavity through the sensor screwed holes and is connected with the monitoring system of the gas adsorption and desorption parameters disposed out of the large-scale cavity; the loading system hermetically passes through the cover plate and regulates stress environment of the coal in the large-scale cavity; the gas feeding system is communicated with the large-scale cavity through an air inlet pipe; and the vacuum pump is communicated with the large-scale cavity through the air inlet pipe. The test system can realize laboratory experiment study of the gas adsorption and desorption laws of the large-scale coal, and is reliable, economic and simple experimental means.

Description

technical field [0001] The invention relates to the technical field of coal mine equipment, in particular to a large-scale coal gas adsorption and desorption simulation test system. Background technique [0002] At present, the gas desorption and adsorption characteristics of coal samples are based on on-site sampling and then carried out with laboratory test equipment. However, the coal samples currently studied in laboratory experiments are mainly coal powder, and there are fundamental differences in scale and internal structure with the actual large-scale coal bodies (containing rich pore and fissure structures, located in mining-affected environments, etc.) Moreover, the coal wall gas in the mining space of the working face is under the influence of a certain external environment, and the gas gushes out to the outside world, and the gas desorption and adsorption characteristics tests carried out in the existing laboratories do not consider the influence of the external e...

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Problems solved by technology

However, the coal samples currently studied in laboratory experiments are mainly coal powder, and there are fundamental differences in scale and internal structure with the actual large-scale coal bodies (containing rich pore and fissure structures, located in mining-affected environments, etc.) Moreover, the coal wall gas in the mining space of the working face is under the influence of a certain external environment, and the gas gushes out to the outside world, and the gas desorption and adsorption characteristics tests carried out in the existing laboratories do not consider the influence of the external environment. There may be large differences in the obtained results, which cannot reflect the real coal gas desorption and adsorption characteristics.

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