A variable-load extraction pipeline and extraction method based on the principle of catalytic denaturation

Abstract

The invention relates to a variable load extraction pipeline and an extraction method based on a catalytic degeneration principle. The variable load extraction pipeline is used for a gas extraction system of a coal mined-out area; and the variable load extraction pipeline comprises a primitive section, a transition section and an attenuation, wherein the compressive load of the primitive section is P1, the compressive load of the attenuation section is P2, the compressive load of the transition section is P3, and P1 > P3 > P2. According to the variable load extraction pipeline and the extraction method based on the catalytic degeneration principle, the compressive load of the variable load extraction pipeline is changed by the catalytic degeneration principle, the roof collapse effect of a down hole working surface is utilized, so that automatic separation of an extraction system and the deep extraction pipeline of the mined-out area can be achieved, an extraction opening located in the best extraction position is ensured, the continuity, scientificity and high efficiency of gas extraction is achieved, downloading catalyst is artificially sprayed in advance in the whole process, the rest of the process are achieved by roof collapse pressure, artificial intervention is not needed, and the security of a personnel on the working surface is ensured.

Description

technical field [0001] The invention belongs to the technical field of gas drainage in goafs of coal mines, and in particular relates to a variable-load drainage pipeline and a drainage method based on the principle of catalytic denaturation. Background technique [0002] In recent years, the Chinese government and coal mining enterprises have attached great importance to gas drainage and prevention of gas disasters. Full coverage of gas drainage in high-gas mines has become a basic requirement to ensure safe production in coal mines. Gas gushing out of goafs is the focus of coal mine gas control work and difficult. [0003] At present, the most effective and commonly used method to control the gas gushing out of the goaf is the upper corner buried pipe drainage. The essence of this method is to pre-lay the drainage pipeline in the return air lane of the working face, and the drainage pipe will be drained after the roof of the working face collapses. The road is buried in t...

AI Technical Summary

Problems solved by technology

Due to the limitation of the space of the underground working face (people in the goaf cannot enter), the manual dismantling of the pipeline needs to temporarily shut down the drainage system of the working face, resulting in interruption of drainage and lack of continuity. To ensure the continuity of drainage, it is necessary to Another replacement pipeline is laid in the air return lane, which makes the originally limited space of the underground working face more crowded, which not only causes waste of resources, but also affects the transportation of coal and materials, which is unscientific; Due to the limitation of length (generally 4-6m), it is difficult to accurately control the position of the drainage port by manually dismantling the pipeline, and the position of the drainage port is the key factor determining the drainage effect, and the distance between the drainage port and the working face will affect the The gas control effect of the working face, for the spontaneous combustion coal seam, may also cause the spontaneous combustion of the residual coal in the goaf, causing a mine fire; Personnel and equipment bring safety hazards, lack of efficiency and safety

Images