Integrated coal and gas adsorption, desorption and outburst test device and test method

Abstract

The invention discloses an integrated coal and gas adsorption and desorption and outburst test device which comprises a cylindrical coal sample room, wherein a plurality of pressure and temperature sensors are arranged on the outer wall of the coal sample room, hydraulic loading and inflating equipment is fixedly mounted at one end of the coal sample room, a coal and gas spout is formed in the other end of the coal sample room, and a quick release mechanism is arranged at the coal and gas spout; the hydraulic loading and inflating equipment comprises a piston rod, a piston matched with an inner cavity of the coal sample room is arranged on the piston rod, the tail end of the piston rod is connected with a surface type inflatable loading disc, the piston and the surface type inflatable loading disc are respectively positioned in two independent cavities in the coal sample room, and the piston and a space between the surface type inflatable loading disc and a longitudinal partition plate are respectively communicated with two hydraulic station interfaces in the coal sample room. The invention simultaneously discloses a test method utilizing the device. According to the integrated coal and gas adsorption and desorption and outburst test device and the test method, the adsorption and desorption characteristics of coal for gas and a coal and gas outburst mechanism can be researched under different ground stresses and different gas pressure conditions of briquette coal.

Description

technical field [0001] The invention belongs to the technical field of coal scientific research, and in particular relates to an integrated coal and gas adsorption, desorption and outburst test device and test method for different ground stresses and different gas pressure conditions. Background technique [0002] At present, coal and gas outburst is an extremely complex dynamic instability phenomenon that occurs in underground coal mines. It is one of the most serious disasters in underground coal mine production. It can cause accidents such as coal and rock mass hitting or burying underground personnel and destroying underground facilities. , and even destroy the entire working surface, the negative impact is extremely bad. Because the coal and gas outburst in the coal mine has the characteristics of short time and great harm, it is very risky to carry out comprehensive research on the on-site coal and gas outburst process. At present, scholars mainly rely on laboratory mo...

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Problems solved by technology

[0014] 1. The above-mentioned simulation test device cannot realize the test of coal and gas adsorption characteristics;

[0015] 2. Regardless of the size of the above-mentioned test device, its internal model is mostly a cuboid, and stress concentration is easily formed at the corners of the model when loading;

[0016] 3. The operation of the above-mentioned model test device is complicated, and most of them can only qualitatively observe the outburst phenomenon, and cannot collect the parameters such as pressure and temperature during the coal and gas outburst test and the transient change law of the outburst phenomenon at one time, so as to realize quantitative analysis

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