Experimental system and method for gas loss measurement during coal sample crushing

Abstract

The invention provides an experimental system and an experimental method for measuring the loss amount of gas in the process of crushing coal samples. The experimental system comprises an experiment main body device, a vacuumizing system, a pressure loading system, a gas loading system, a linear motor control system, a digital type mass flowmeter and a gas collecting system. The process of crushing a coal seam and initially desorbing gas can be simulated, and an experiment method is provided for mastering the coal seam crushing and gas initial desorption rule. The gas initial desorption rule when different coal seams are crushed under the condition of different environmental parameters can be analyzed through a large amount of experimental data, and the gas desorption quantity calculation formula is summarized. Scientific theoretical basis is provided for calculation of gas loss amount in a method for measuring the gas content of the coal seam by a direct method, the measuring accuracy of the direct method is improved, and technical guarantee is provided for safety mining of the coal.

Description

technical field [0001] The invention belongs to the field of coal mine gas disaster prevention and control, and in particular relates to an experimental system and method for measuring gas loss during the coal sample crushing process. Background technique [0002] Coal and gas outburst is an extremely complex gas dynamic disaster phenomenon that occurs in underground coal mines. Since 2009, my country has implemented the "Regulations on the Prevention and Control of Coal and Gas Outbursts", which put forward strict requirements for the mining of coal and gas outburst coal seams. Coal and gas outburst prediction can guide the scientific application of outburst prevention measures, reduce the amount of outburst prevention measures, and ensure the personal safety of workers operating in outburst coal seams. Therefore, highlighting the forecast has great practical significance. According to the comprehensive effect hypothesis of coal and gas outburst, the gas content of coal s...

AI Technical Summary

Problems solved by technology

However, all these compensation calculation formulas and methods have different gas desorption laws in different time periods, different coal qualities and different media. Therefore, the loss of gas calculated by the compensation formula has a large error, which directly affects the determination of the gas content of the direct method. Accuracy, which brings safety hazards to coal mine safety production

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