Automatic concentration adjusting and controlling early warning method for underground gas extraction pipelines and system of automatic concentration adjusting and controlling early warning method

Abstract

An automatic concentration adjusting and controlling early warning method for underground gas extraction pipelines includes (1) integrally assembling a signal acquisition unit with an actuating unit and mounting the signal acquisition unit and the actuating unit onto a gas extraction pipeline; (2) operating the actuating unit and determining the longest negative pressure lag time between pipeline gas concentration and extraction negative pressure and the highest pipeline gas concentration; (3) setting early warning gas concentration and early warning negative pressure lag time according to the obtained longest negative pressure lag time and the obtained highest pipeline gas concentration; (4) acquiring a current gas concentration value and a current negative pressure value in real time; promoting that the highest pipeline gas concentration is mistaken if the current gas concentration value is higher than the highest pipeline gas concentration, and actuating the step (2) again; keeping opening of an electric valve unchanged if the current gas concentration value is smaller than the highest pipeline gas concentration but larger than a set early warning gas concentration value; and alarming if the current gas concentration value is smaller than the set early warning gas concentration value, simultaneously searching the best extraction negative pressure, and then continuing extracting gas under the condition of the best extraction negative pressure; and (5) periodically repeating the step (2), the step (3) and the step (4) after a system runs normally.

Description

technical field [0001] The invention relates to the technical field of gas drainage in coal mines, in particular to a method for regulating gas concentration in an underground gas drainage pipeline and an early warning method for hidden dangers. Background technique [0002] In the past ten years, my country's coal output has increased from 1 billion tons to 3 billion tons, and the mining depth has increased year by year. There are more and more high-gas mines and coal and gas outburst mines. The state stipulates that gas drainage must be implemented in high-gas mines and coal and gas outburst mines, and mining is not allowed if the drainage does not meet the standards. Underground gas drainage is one of the main means of coal mine gas control. It is an important safety guarantee for high output and high efficiency in high outburst mines, and it is also the basis and premise of gas utilization. [0003] Underground coal mine gas drainage by borehole drilling usually involve...

AI Technical Summary

Problems solved by technology

[0010] The key technical problem to be solved by the present invention is to change the current situation of manual adjustment and blind regulation of the gas concentration in the existing gas drainage pipeline, and to solve the matching problem between the negative pressure of the gas drainage pipeline and the gas concentration and flow rate; the purpose is to provide a An automatic control and early warning system for underground gas drainage pipeline concentration and its application method, which can improve and stabilize the gas concentration in the drainage pipeline, and implement early warning for hidden dangers in the drainage pipeline

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