Experimental system of coal mine gas explosion blocking device

Abstract

The invention relates to an experimental system of a coal mine gas explosion blocking device. The experimental system comprises a gas accumulation device, an explosion ignition device, sensors, a data acquisition device, experimental pipelines and a gas explosion secondary disaster blocking device; testing gas is supplied by a gas cylinder, the gas accumulation quantity is controlled by a gas flowmeter and a gas valve, a partition plate partitions a gas accumulation pipeline and the experimental pipelines, and after the gas concentration reaches the experimental requirement, the gas valve is switched off; gas in the gas accumulation device is detonated by an electric spark generator to simulate gas explosion under a coal mine well; the sensors are installed at the two ends of the experimental pipeline of the gas explosion secondary disaster blocking device, temperature, pressure and flame test data simulating gas explosion is acquired by the data acquisition device, stored in a computer and analyzed by software; the experimental pipelines are made from tempered glass and comprise the experimental pipeline of the blocking device and the experimental pipeline of a monitoring segment. The experimental system can verify the validity of the gas explosion blocking device and show the defects existing in gas explosion blocking device design.

Description

technical field [0001] The invention belongs to a test device, namely an experimental system of a coal mine gas explosion barrier device, which is used to verify the effectiveness of the gas explosion barrier device. Background technique [0002] Gas is an explosive gas associated with coal resources. Every year, my country's coal mine gas explosion accidents rank first in the production casualties in the coal industry, often causing mass deaths and injuries. How to reduce the casualties and injuries caused by coal mine gas explosion accidents? Property loss and how to effectively prevent and control gas explosions are of great significance to coal safety production. [0003] At present, the prevention and control of coal mine gas explosion disasters mainly focus on the following aspects: 1) reducing the gas content and gas pressure in the coal seam, using gas extraction and protective layer mining, etc.; 2) monitoring the gas concentration, such as limiting the gas concentra...

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Problems solved by technology

[0003] At present, the prevention and control of coal mine gas explosion disasters mainly focus on the following aspects: 1) reducing the gas content and gas pressure in the coal seam, using gas extraction and protective layer mining, etc.; 2) monitoring the gas concentration, such as limiting the gas concentration. If it exceeds 1%, it is mainly to control the gas concentration below the explosion limit and prevent gas explosion; 3) Fire source control, such as strict procedures for underground fires, daily fire sources are strictly prohibited from going into the well, natural monitoring of coal bodies and other management measures; 4) Mining Natural prevention and control measures for empty areas, such as grouting, filling inert gas, etc.; however, coal mine gas explosion accidents still occur. For example, in May 2016, the Shaba coal mine gas explosion in Yanjin County, Yunnan Province killed 6 people. 10 people died in a gas explosion accident at Yongji Coal Mine in Shangrao County, Jiangxi Province

[0004] Facilities for reducing gas explosion disasters include explosion-proof water bags, water tanks or air bags. The function of explosion-proof water bags or water tanks is that when the gas explodes, the shock wave generated by the explosion will overturn the water bag or water tank to isolate and extinguish the flames. After overturning the explosion-proof water bag or water tank, it will continue to spread forward, causing dust, damaging local ventilators, damaging ventilation facilities and electrical equipment, and causing gas or coal dust explosion again

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