A method of using air cannon vibration to increase gas permeability of coal seams

Abstract

The invention relates to the technical field of coal seam gas, and discloses a method for improving the air permeability of coal seam gas by using air cannon vibration, including a mounting seat, a support plate and a gas storage bin, the bottom of the support plate is fixedly connected to the top of the mounting seat, The bottom of the gas storage bin is fixedly connected to the top of the support plate, the top of the gas storage bin includes a barrel tube, and the bottom of the gun barrel tube is fixedly connected to the top of the gas storage bin. This method uses air cannon vibration to increase the air permeability of coal seam gas. By passing gas from the position of the intake pipe to the interior of the device, the gas enters the interior of the gas storage bin for storage. When the pressure inside the device reaches a certain level, The air pressure will automatically lift the metal plate on the top of the hanging weight, and the metal plate will be pushed to the top of the gun barrel, and then the gun will be fired outward through the ring-shaped muzzle belt in the middle, so that the device can crack the coal seam through the air gun, increasing The air permeability of the coal seam is increased, and the probability of gas accidents is reduced.

Description

technical field [0001] The invention relates to the technical field of coal seam gas, in particular to a method for increasing the air permeability of coal seam gas by using air cannon vibration. Background technique [0002] Gas is formed by the decomposition of cellulose and organic matter by anaerobic bacteria in the initial stage of coal accumulation by ancient plants. In the environment of high temperature and high pressure, while coal is formed, gas continues to be generated due to physical and chemical effects. Gas is a colorless, odorless gas, but sometimes you can smell an apple-like aroma, which is due to the simultaneous gushing of aromatic hydrocarbon gases and gas. The relative density of gas to air is 0.554, and the density of gas in the standard state is 0.716kg / m 3 The permeability of gas is 1.6 times that of air. It is difficult to dissolve in water. It cannot support combustion and cannot maintain breathing. When it reaches a certain concentration, it can...

AI Technical Summary

Problems solved by technology

[0003] When the gas concentration inside the coal seam is too high, it is easy to cause a series of safety hazards. Therefore, it is necessary to use corresponding means to reduce the gas concentration in the daily work process. The traditional method is mainly to use the method of pre-pumping coal seam gas. However, most of the coal seams in my country are high-gas and low-permeability coal seams, and the gas permeability coefficient of the coal seams is small, so it is difficult to extract gas. This method is cumbersome to implement, so we propose a method of using air cannon vibration to increase the gas permeability of coal seams to effectively increase the gas permeability

Images