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

Abstract

The invention discloses a split type coal-gas adsorption desorption and outburst test device, which comprises a cylindrical coal sample chamber. The coal sample chamber is provided with several pressure temperature sensors able to detect molded coal temperature and gas pressure. Hydraulic loading equipment able to stretch into the coal sample chamber and apply axial ground stress is fixedly mounted at one end of the coal sample chamber, the other end is provided with a coal-gas blowout port communicated with the coal sample chamber during work, and a quick release mechanism is disposed at the coal-gas blowout port to control the blowout port breakover. The hydraulic loading equipment is connected to a piston rod through a universal joint, and the tail end of the piston rod is connected to a surface type inflation loading disc in contact with a coal sample placed in the coal sample chamber during test. The invention also discloses a test method using the device. The device and the method provided by the invention can research the adsorption desorption characteristics of coal to gas and the coal-gas outburst mechanism when molded coal is under different ground stress and gas pressure conditions.

Description

technical field [0001] The invention belongs to the technical field of coal scientific research, and in particular relates to a split-type 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 mod...

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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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