Self-diagnostic system and method for soft connection of grading gas-suctioning mine bundle pipes

Abstract

The invention discloses a self-diagnostic system and method for soft connection of grading gas-suctioning mine bundle pipes. The system is characterized in that the impact on the bundle pipes due to a geological structure is reduced by connection of telescopic pipes and steel pipes; by adoption of a mode of a multi-stage pump for air suctioning, the pressure difference in the bundle pipes is reduced, the pressure-resistance requirement of the bundle pipe system is reduced; by adoption of a multi-point sampling method for controlling selection of sampling points by using an electromagnetic valve, a set of system for monitoring multiple tunnels is realized; an ultrasonic gas-leakage detector is arranged at the connecting position of each gas pump and the pipeline so as to monitor whether the system leaks gas; and then according to the intensity and the frequency of the ultrasonic gas-leakage sensor, the quantity and the positions of gas-leakage points are analyzed. The system and method disclosed by the invention have the advantages that real-time and reliable monitoring for guaranteeing the safety of the mine by suctioning gas to be detected of multiple tunnels under the mine into monitoring equipment outside a mine in a safe-fast-reliable manner can be realized.

Description

【Technical field】 [0001] The invention relates to the field of long-distance multi-sampling point gas collection, in particular to the field of on-line monitoring of bundle tubes for mine spontaneous combustion gas. 【Background technique】 [0002] my country is a country that consumes a lot of energy, and nearly 70% of the energy demand is met by the mining of coal resources in our country. However, in the process of coal mining in our country, there are many safety accidents, and more than 70% of them are caused by coal spontaneous combustion. For this reason, various large coal mines use bundle tubes to pump underground gas to the wellhead, or manually use airbags to take gas from the underground to the wellhead, and then use gas chromatography for quantitative analysis to determine the composition and content of the gas, and then evaluate Downhole safety level. [0003] On the one hand, manual sampling is based entirely on the experience of the sampler, which often affe...

AI Technical Summary

Problems solved by technology

This improvement can reduce the pressure inside the bundle tube and realize multi-point sampling analysis, but it cannot overcome the defect of the bundle tube leak caused by the deformation of the mine roadway, let alone determine the severity and location of the leak

Therefore, these methods cannot fundamentally improve the reliability of the mine bundle pipe system

Images