Y-shaped ventilation method

Abstract

The invention relates to a Y-shaped ventilation method, which comprises the following steps of: A. when tunneling at a gate road of a mining face, combining the gate road and retaining roadways along a goaf and tunneling, and building 'concrete pier columns in the roadways' therebetween; B. after finishing digging a through cut, digging the gate road and the through cut at the mining face in the next section; C. after starting stopping, building a 'separation wall' between the concrete pier columns with the propelling of the mining face to separate the goaf; and D. when the mining face stopes, accessing fresh air flow in two paths, wherein in one path, the air is accessed from the gate road of the mining face and is exhausted to the lower outlet of the mining face through the mining face; and in the other path, the air is accessed from the gate road of the mining face and one side of a mining stopping line in the retaining roadways to join with the lack air flow of the mining face at the lower outlet of the mining face; and the lack air flow comes to a return airway of the mining area through the lower outlet of the mining face to the separation of the pier columns, the separation wall sections of the retaining roadways, the next section through cut and the gate road and the retaining roadways to finish Y-shaped ventilation. In the invention, the method of new retaining roadways along the goaf, namely gate road and retaining roadways are combined to tunnel the concrete pier columns support and protection in the arranged roadways, thus, Y-shaped ventilation can be realized, coal dust can be reduced, ventilation quality can be improved and the temperature can be reduced. And the method is particularly suitable for the coal mines with high-temperature and high gas.

Description

technical field [0001] The present invention relates to the ventilation mode of coal mine mining working face, especially the method of realizing "Y" type ventilation by simultaneously excavating and transporting the trough and retaining roadway along the gob and constructing the concrete pier column and the partition wall support in the roadway to the longwall mining working face A method of "Y" ventilation. Background technique [0002] Going to the longwall mining face and retreating back to mining, the upper and lower troughs enter the wind at the same time, which can prevent the gob gas from rushing to the working face and gas accumulation in the upper corner of the working face, and improve the meteorological conditions of the upper and lower troughs. When the production of the working face is large (2000-3000t / d), the effect is good when the amount of gas gushing out is large, but the full length of the upward groove of the mining face in the next section needs to be...

AI Technical Summary

Problems solved by technology

When the production of the working face is large (2000-3000t / d), the effect is good when the amount of gas gushing out is large, but the entire length of the upward groove of the mining face in the next section needs to be dug in advance. difficult to maintain

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