Experimental system and method for measuring loss amount of gas in process of crushing coal samples

A crushing process and experimental system technology, applied in the direction of weighing by removing certain components, can solve the problems of large error in the amount of gas lost, affecting the accuracy of the gas content measurement value, hidden dangers of coal mine safety production, etc., to improve the measurement The effect of accuracy

Active Publication Date: 2017-06-27
ANHUI UNIV OF SCI & TECH
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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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  • Experimental system and method for measuring loss amount of gas in process of crushing coal samples

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Embodiment Construction

[0024] Before the experiment is carried out, the coal samples of the coal seam in the coal mine shall be collected first, the raw coal shall be crushed with a crusher, and then the dried coal samples shall be put into the vibrating sieve for screening, and shaped coal shall be prepared according to the principle of similarity and a certain proportion. Complete the assembly of the experimental system, and connect the main experimental device and other auxiliary systems according to the composition of the experimental system: the linear motor 1-2 is connected to the linear motor control system, the gas outlet A (1-3) of the crushed coal bunker and the gas outlet of the coal bunker ( 1-11) are all connected to the vacuum system, the gas outlet B (1-4) of the crushed coal bunker is connected to the digital mass flow meter and the gas collection system in turn, and the gas charging port (1-10) of the coal bunker is connected to the gas loading system. The pressure loading push rods ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N5/04
CPCG01N5/04
Inventor 郑晓亮袁亮薛生刘泽功李尧斌周波李文权陈鲜展
Owner ANHUI UNIV OF SCI & TECH
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