A simulation test method for coal and gas outburst

Abstract

Belonging to the field of coal-mine gas disaster control, the invention puts forward an outburst simulation test method. Heating and pressurization are carried out on lignite and other low metamorphic non-outburst test coal samples in an outburst simulation test device to let the substances deform, break and metamorphose to generate gas so as to form outburst coal with outburst potential, and then coal and gas outburst simulation test study can be carried out. The specific test steps include: A. collecting lignite and other low metamorphic non-outburst coal samples on the spot, conducting laboratory vacuum drying and degassing for 48h, on the basis of maintaining a coal sample primary structure, preparing a coal sample according to the size of the test device; B. under an airtight condition, carrying out temperature (20-390DEG C), pressure (a confining pressure of 20-220MPa), time (1h-120d), moisture (moisture percentage) and other single parameter and multi-parameter coupled outburst potential inoculation evolution simulation test; and C. using a quick opening device to open an outburst cover suddenly, and simulating a dynamic emergence process of coal and gas outburst.

Description

technical field The invention relates to a test method for simulating prominent endogenous gas. Background technique With the increase of coal mining depth, the number of coal and gas outburst mines has increased significantly. Coal enterprises with outburst mines invest a lot of human, material and financial resources every year to prevent coal and gas outburst. In the blocks where anti-outburst measures have been taken, coal and gas outburst accidents still occur from time to time, and some mines are even forced to close due to serious coal and gas outburst disasters. The mechanism of coal and gas outburst is extremely complex, and the current understanding of the outburst mechanism is still at the stage of qualitative analysis and semi-quantitative description, and the understanding of the outburst mechanism is not yet clear and clear. Carrying out the research on the mechanism of coal and gas outburst has important theoretical significance for the effective prevention ...

AI Technical Summary

Problems solved by technology

The mechanism of coal and gas outburst is extremely complex, and the current understanding of the outburst mechanism is still at the stage of qualitative analysis and semi-quantitative description, and the understanding of the outburst mechanism is not yet clear and clear

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