Auxiliary explosion-proof system for coal mine air shaft

Abstract

The invention discloses an auxiliary explosion-proof system for an air shaft in a coal mine, which is arranged at the wellhead of the air shaft. A wellhead base is arranged around the wellhead of the air shaft. The wellhead base is made of reinforced concrete. The base body protrudes upwards from the ground and extends a section of the well wall. A number of auxiliary explosion venting passages are arranged at intervals in a circular array on the well wall. The auxiliary explosion venting passages penetrate the well wall. The explosion pipeline and the wellhead base are fixed together by cement pouring, and the outer end of the metal explosion relief pipeline is welded with a flange plate, and an auxiliary explosion-proof door is installed on the flange plate; the auxiliary explosion relief channel can realize the pre-pressure relief of the explosion shock wave and During the process of pressure relief, the auxiliary explosion relief channel will greatly reduce the impact and damage of the explosion shock wave on the main explosion-proof door of the wellhead; the door panel and the supporting frame of the auxiliary explosion-proof door are designed separately, the explosion relief effect is good, and it is adaptable to the explosion shock. destroy.

Description

technical field [0001] The invention relates to the technical field of coal mine air shaft safety, in particular to an auxiliary explosion-proof system and an explosion relief method for a coal mine air shaft, which are used to reduce the blast wave impact suffered by a main explosion-proof door of a coal mine air shaft. Background technique [0002] The coal mine air shaft explosion-proof door is an important explosion venting facility to protect the mine main ventilator. Its function is to quickly release the explosion impact airflow in the air shaft in the event of an explosion, thereby protecting the coal mine main ventilator from destructive impact. [0003] At present, a bell-shaped explosion-proof door is generally used in vertical wind shafts of coal mines in my country, which is composed of a door body, a sealed oil tank, a pulley frame, a counterweight, and a traction wire rope. This type of explosion-proof door lacks a reliable guiding mechanism, and has no buffer...

AI Technical Summary

Problems solved by technology

[0004] Aiming at the defects and hidden dangers of the current explosion-proof doors for air shafts, and centering on the technical goal of quick reset of the explosion-proof doors after disasters, many new types of explosion-proof doors for air shafts have been proposed in China, and the anti-blast performance and safety of the explosion-proof doors are generally enhanced from the aspects of guidance, buffering, and limit. Reset reliability; however, the explosion-proof door of the wind shaft is a large structure, which will obtain huge impact energy in the explosion, and it is extremely difficult to apply technical measures such as guiding, buffering, and limiting, and the corresponding technical costs are also very high

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