High-position inclined E-type ventilation system of coal face

Abstract

The invention relates to a ventilation system, of which the gas of an upper corner and a ventilation roadway is ultra-limit on a coal face, in particular to a high-position inclined E-type ventilation system of the coal face, and belongs to the technical field of coal mine safety equipment. A gas discharging high-position tunnel is formed between the ventilation roadway and an intake airway closed to a coal seam upper rock layer of the ventilation roadway, so as to form the high-position inclined E-type ventilation system with one intake airway and two ventilation roadways; the gas of a goaf can be restrained from pouring out to the upper corner and the ventilation roadway through adjusting the air quantity and air pressure of the ventilation roadway and the gas discharging high-position tunnel; and the gas of the goaf can be introduced to migrate to a gas special tunnel. The system uses a high-position tail tunnel, so that air leak congruence of the goaf is increased, and the gas accumulation of a U-type ventilation system is changed; and under the negative pressure of the ventilation system and / or the auxiliary extraction negative pressure functions, a high-position inclined E-type work face air power system is formed, so that the gas accumulation problem of the upper corner on the work face can be effectively solved.

Description

technical field [0001] The invention relates to a ventilation system for gas overrun in the upper corner of a coal mining working face and a return airway, in particular to a high-position partial E-type ventilation system for a coal mining working face, which belongs to the technical field of coal mine safety equipment. Background technique [0002] With the continuous strengthening of the modern production technology of coal mines, the intensity of comprehensive mechanized coal mining is increasing, the production is concentrated, and the advancement speed is fast, so that the gas gushing out of the mining face has the characteristics of high intensity, large quantity and unbalanced gushing. Due to the high mining height, long mining area and large strike length, the gob area is large, resulting in serious overrun of return air flow and local gas (especially in the upper corner), which poses a great threat to safe production. [0003] At present, the U-shaped ventilation s...

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Problems solved by technology

[0002] With the continuous strengthening of the modern production technology of coal mines, the intensity of comprehensive mechanized coal mining is increasing, the production is concentrated, and the advancement speed is fast, so that the gas gushing out of the mining face has the characteristics of high intensity, large quantity and unbalanced gushing. Due to the large mining height, long mining area and large strike length, the goaf area is large, resulting in serious overrun of return air flow and local gas (especially in the upper corner), which poses a great threat to safe production

[0003] At present, the U-shaped ventilation system of the working face is commonly used because the gas concentration in the upper corner and the return air channel often exceeds the limit, which seriously affects the normal production of the coal mine, restricts the popularization and application of high-yield and efficient coal mining technology and the improvement of comprehensive economic benefits.

In order to ensure a higher output, a certain coal cutting speed must be ensured, so it is difficult to effectively control the coal wall and coal gas gushing out of the working face. Generally, the gas gushing out of coal can only be reduced by pre-pumping

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