Underground coal mine explosion-proof method

Abstract

The invention discloses an underground coal mine explosion-proof method. Under normal conditions, a fire door (10.2) is in the opening state, an electric valve (10.8) is closed, a main gas inlet pipe(6.9) does not communicate with an exhaust pipe (10), when the gas concentration in the main exhaust pipe (10) is detected to be too high by a gas concentration sensor (10.1), a controller (10.3) drives the electric valve (10.8) to open, the main gas inlet pipe (6.9) communicates with the main exhaust pipe (10), and fresh air in the main gas inlet pipe (6.9) enters the main exhaust pipe (10) to reduce the gas concentration in the main exhaust pipe (10); and if a temperature sensor (10.4) or a pressure sensor (10.5) detects abnormal temperature and pressure inside the pipe, the controller (10.3) determines the occurrence of a gas explosion and sends a signal to control the electric valve (10.8) and the fire door (10.2) to be closed and turn on spray headers (10.6) and a powder blower (10.7). The underground coal mine explosion-proof method can effectively prevent the occurrence of the underground gas explosion.

Description

technical field [0001] The invention belongs to the field of coal, in particular to an underground explosion-proof method for coal mines. Background technique [0002] Coal is the main energy source in my country's mineral resources, and it is also an important industrial raw material for electric power, steel, chemical industry and other industries. It has a very important strategic position in the national economic construction. According to statistics, coal accounts for more than 75% of my country's primary energy consumption. With the global energy crisis, coal's status as my country's main energy source is difficult to change for a long time. Coal production is still a high-risk industry due to harsh working conditions and low reliability and automation of mining equipment. Accidents such as gas explosions in coal mines, rock collapses, and water inrushes occur from time to time. [0003] In the prior art, in order to prevent the occurrence of gas explosion accidents,...

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Problems solved by technology

[0003] In the prior art, in order to prevent the occurrence of gas explosion accidents, on the one hand, a plurality of gas monitoring sensors are arranged underground, and an alarm is issued when the gas concentration exceeds the standard is detected; Exhaust to the outside of the well, because the exhaust fan will inhale a large amount of flammable gas gas and air from the fully mechanized mining operation face, and the diameter of the main exhaust pipe should not be too large (generally not exceeding 100cm) because it is installed underground. This will easily cause the gas concentration in the main exhaust pipe to exceed the standard, causing the gas explosion in the pipe (a pipe burst accident), and then causing a large-scale fire.

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