Method for detecting fault of coal bed methane collecting and delivering pipeline at coal mine region

Abstract

The invention relates to the field of coal mine safety, and in particular relates to a method for detecting the fault of a coal bed methane collecting and delivering pipeline at a coal mine region, wherein the method can carry out real-time detection for a coal bed methane collecting and delivering pipe network, and determine whether the pipeline malfunctions. The method comprises the following steps: 1) collecting the pressure, flow rate, concentration and temperature data in the coal bed methane collecting and delivering pipeline at the coal mine region; 2) obtaining a pressure index K1 of the pipeline between two collecting points according to the pressure, flow rate, concentration and temperature data of two adjacent collecting points; and 3) determining the pipeline malfunctions if the pressure index K1 is greater than a threshold value epsilon 1; obtaining a flow rate index K2 and a concentration index K3 of the pipeline between two collecting points according to the pressure, flow rate, concentration and temperature data of two adjacent collecting points in the step 2) further; and then determining the type of the fault according to a fault determining model. According to the invention, through determining whether the pipeline malfunctions or the type of the fault, the alarm is convenient to raise, the fault is convenient to deal with, and the safe transportation of drawn and extracted coal bed methane under the well at the coal region is convenient to realize.

Description

technical field [0001] The invention relates to the field of coal mine safety, in particular to a fault detection method for a coalbed gas gathering and transportation pipeline in a coal mining area. Background technique [0002] Coalbed methane, also known as coalbed gas or coalbed methane, is a self-storage natural gas that exists in coal seams and solid rocks in an adsorbed or free state through biochemical pyrolysis during the coal formation process. It belongs to unconventional natural gas and is high-quality Chemical and Energy Raw Materials [0003] The concentration of coalbed methane in the coal mining area is determined by the extraction method and process and the sealing state of the gathering pipeline of the extraction system. After the extraction method and process are determined under specific extraction conditions, the concentration of the extraction system The sealing state of the gathering pipeline determines the level of its extraction concentration. At p...

AI Technical Summary

Problems solved by technology

At present, among the coalbed methane extracted underground in coal mining areas, the concentration of a few better pumping stations is only about 50%, and more than 60% of the pumping stations have a concentration of less than 30%.

On the one hand, this causes a great waste of the capacity of the drainage system. On the other hand, in the part of the pumping station where the extraction concentration is lower than 30%, a large part of the concentration is just in the explosive concentration range, thus making the extraction and collection There are great potential safety hazards in the process of transporting or even emptying this part of coalbed methane

Once the gathering pipeline leaks or breaks, it is likely to cause a gas explosion in the mine, so that the safety of the entire mine is potentially threatened

And because there is a certain amount of water and coal dust in the coalbed methane extracted underground, the long-term accumulation may block the pipeline and cause hidden dangers to the safe production of the mine.

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