Intelligent control method for efficient extraction of coalbed methane in goafs

Abstract

An intelligent control method for efficient extraction of coalbed methane in goafs includes judging whether extracting the coalbed methane in each goaf or not by utilizing a mobile mining pump station or constructing a fixed downhole extraction pipe network and according to whether concentration of CH4 in the goafs, a working face and a return gasway exceeds the standard or not. In addition, the control method includes real-time monitoring of other gas compositions and gas temperature restricting extraction of the coalbed methane, and the gas compositions include ethylene, carbon monoxide and oxygen. The invention particularly provides the intelligent control method for efficient extraction of the coalbed methane in the goafs. During application and practice, the method basically solves the problems of independent operation and single extraction control parameter in each goaf, no safety control guarantee during extraction process and low extraction efficiency. Prospective objective of system optimization is achieved, and utilization rate and extraction efficiency can be brought into full play under the condition that the extraction capacity is consistent.

Description

technical field [0001] The invention relates to coal bed gas extraction technology in goaf areas of coal mines, and in particular provides an intelligent control method for efficient extraction of coal bed gas in goaf areas. Background technique [0002] In China's coal mine industry, the extraction of coalbed methane in the goaf is already an indispensable process link in coal mine safety production, energy saving and emission reduction, and gas utilization. The quality of coalbed methane extraction directly affects the safety and stability of coal mines production, improve energy saving and emission reduction level, and efficiently utilize gas; at present, the coalbed methane extraction methods in gobs of coal mines in China are traditional and backward, and they are multi-variety, and the technical means are uneven. The drainage control process of most mines is simple, During the formation of the goaf, the drainage pipeline with the suction port is pre-buried, and when th...

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Problems solved by technology

[0004] In particular, the present invention provides an intelligent control method for high-efficiency coalbed methane drainage in goafs. In practice, this method basically overcomes the existing problems in existing goaf extraction technologies that each goaf acts independently and the extraction control parameters are single. The extraction process has no safety control guarantee, basically solves the problem of low extraction efficiency, achieves the expected goal of the present invention to realize system optimization, and maximizes the utilization rate of the system when the extraction capacity is certain and extraction efficiency

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