Coal and gas outburst simulation test method

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

[0001] The invention relates to a test method for simulating prominent endogenous gas. Background technique

[0002] 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 effec...

Examples

Embodiment Construction

[0012] Concrete research method of the present invention comprises the following steps:

[0013] A. Outburst coal inoculation simulation test: Prepare a test coal sample with a primary structure, and after vacuum degassing for 48 hours, carry out temperature (20-390°C), pressure (confining pressure 20-220MPa), time ( 1h~120d), moisture (water content percentage) and other single parameters and multi-parameter coupling outstanding potential breeding evolution simulation experiments.

[0014] Outburst power display simulation test: After the temperature of the outburst coal body formed under high temperature conditions drops to room temperature, the overhang is suddenly and quickly opened to simulate the power display process. Using the outburst coal bodies with different outburst potentials formed under different temperature, pressure and time conditions to simulate on-site outburst, use high-speed cameras to record the entire dynamic display process, monitor and collect acoust...

technical field

[0001] The invention relates to a test method for simulating prominent endogenous gas. Background technique

[0002] 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 effec...

Examples

Embodiment Construction

[0012] Concrete research method of the present invention comprises the following steps:

[0013] A. Outburst coal inoculation simulation test: Prepare a test coal sample with a primary structure, and after vacuum degassing for 48 hours, carry out temperature (20-390°C), pressure (confining pressure 20-220MPa), time ( 1h~120d), moisture (water content percentage) and other single parameters and multi-parameter coupling outstanding potential breeding evolution simulation experiments.

[0014] Outburst power display simulation test: After the temperature of the outburst coal body formed under high temperature conditions drops to room temperature, the overhang is suddenly and quickly opened to simulate the power display process. Using the outburst coal bodies with different outburst potentials formed under different temperature, pressure and time conditions to simulate on-site outburst, use high-speed cameras to record the entire dynamic display process, monitor and collect acoust...

Images