Experimental device and experimental method for measuring roadway ventilation thermal resistance in mine fire period
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A technology for roadway ventilation and resistance measurement, which is used in measurement devices, aerodynamic tests, and testing of machine/structural components. And other issues
Active Publication Date: 2020-02-11
LIAONING TECHNICAL UNIVERSITY
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[0004] At present, the experiment on ventilation thermal resistance of mine roadway does not distinguish between mixed smoke hot air flow and pure hot air flow, and cannot continuously collect relevant basic parameters such as temperature, humidity, pressure, and wind speed.
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Embodiment 1
[0047] Such as figure 1 As shown, an experimental device for measuring roadway ventilation thermal resistance during a mine fire period includes a first steel pipe 2 with a diameter of 60 mm and a length of 1 m, a second steel pipe 9 with a diameter of 50 mm and a length of 19 m, and a holding furnace 5. The inlet end of the first steel pipe 2 is connected to the ventilator 1, and the ventilator 1 is a DC press-in ventilator, which is used in conjunction with a 12V / 3A DC power supply to provide ventilation power for the entire experimental pipeline to ensure that the combustion furnace The combustibles in 3 have sufficient oxygen supply, and the model of ventilator 1 is SH-196. The power of the ventilator 1 can be adjusted according to the actual conditions of different experimental tunnels, so as to achieve the required wind speed and air volume for the experiment. The inlet end of the second steel pipe 9 is screwed, and the first steel pipe 2 and the second steel pipe 9 ar...
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Abstract
The invention discloses an experimental device and an experimental method for measuring roadway ventilation thermal resistance in a mine fire period. The experimental device comprises a ventilator, afirst steel pipe, a combustion furnace, an electric heating pipe, a holding furnace, an inlet wind speed sensor, an inlet pressure sensor, an inlet temperature and humidity sensor, a second steel pipe, an outlet wind speed sensor, an outlet temperature and humidity sensor, an outlet pressure sensor, a pressure acquisition module, a temperature and humidity acquisition module, a wind speed acquisition module, a data storage module and a temperature rise control module. The experimental method for measuring roadway ventilation thermal resistance in the mine fire period comprises the steps of: step 1, establishing the experimental device; step 2, checking whether the connection of the experimental device is normal, and checking sealing performance; step 3, igniting combustibles, and storing data; step 4, heating by using an electric heating pipe, and recording data; step 5, arranging experimental data; step 6, and drawing a curve. The experimental device and the experimental method are ofgreat significance to formulating underground disaster prevention measures for mines and selecting ventilation decisions and disaster avoidance routes in catastrophe periods.
Description
technical field [0001] The invention relates to the technical field of mine fire prevention and control, in particular to an experimental device and an experimental method for measuring roadway ventilation thermal resistance during a mine fire period. Background technique [0002] Mine fire is one of the main natural disasters in coal mining production. Underground fires will destroy coal resources and equipment, because the underground air supply is limited, combustibles are difficult to burn completely, and a large amount of high-temperature smoke and harmful gases are generated, threatening the lives of workers, and even causing mine gas and coal dust explosions to cause more damage. Great harm. [0003] When a fire occurs underground, the high-temperature smoke generated may damage the original ventilation system of the mine, cause air flow disturbance, and bring difficulties to ventilation decision-making during the fire period. One of the main problems in ventilation...
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