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Gas drainage system of service gallery

A technology for auxiliary tunnels and discharge systems, applied in gas discharge, dust prevention, mining equipment and other directions, can solve problems such as hazards to tunnel safe operation, safety accidents, gas accumulation, etc., to eliminate the risk of gas explosion, improve safety, and reduce gas effect of concentration

Pending Publication Date: 2020-06-02
CHINA RAILWAY ERYUAN ENG GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the above-mentioned deficiencies such as the possibility of gas accumulation in the auxiliary tunnel blocked during the operation of the existing tunnel, which may cause explosion risks, even cause safety accidents, and seriously endanger the safe operation of the tunnel, and provide a gas discharge method for the auxiliary tunnel Systems and Discharge Methods

Method used

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Experimental program
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Embodiment 1

[0040] Such asfigure 1 As shown, the gas discharge system of an auxiliary tunnel according to the present invention includes a ventilation opening 2 connected to the auxiliary tunnel 1, preferably, the ventilation opening 2 is located above the sealing wall 11 of the auxiliary tunnel 1, and the The orientation of the vent 2 is perpendicular to the perennial wind direction at the vent 2, so as to facilitate the discharge of methane gas, and at the same time prevent external air from being poured into the auxiliary tunnel 1 due to the wind direction, and also facilitate the flow of external natural wind to generate negative pressure to suck out all Describe the air in the auxiliary tunnel.

[0041] The size requirement of described vent 2 can be put into storage device 3, and described storage device 3 can store as nitrogen or inert gas or air, promptly as described storage device 3 can be liquid nitrogen tank, high-pressure nitrogen cylinder, inert gas tank , a compressed air t...

Embodiment 2

[0047] Such as figure 2 As shown, the gas discharge system of an auxiliary tunnel according to the present invention has the same structure as that of Embodiment 1, the difference is that the auxiliary tunnel 1 is a horizontal hole or other forms of parallel pilot pits, or There are many sundries on the ground of the tunnel, and a chute 12 is arranged in the auxiliary tunnel 1, and the chute 12 is provided throughout the length, and the chute 12 is arranged below the vent 2, and the tail end of the chute 12 Lower than the end of the chute 12 close to the vent 2, the storage device 3 slides to the tail end of the auxiliary tunnel 1 through the chute 12, which is conducive to releasing gas at the end of the auxiliary tunnel 1 and improving Efficiency and effectiveness of gas emissions.

Embodiment 3

[0049] A gas discharge method for an auxiliary tunnel according to the present invention, comprising applying a gas discharge system for an auxiliary tunnel as described in any one of Embodiments 1-2, comprising the following steps:

[0050] a. The gas concentration acquisition part 4 collects the gas concentration data in the auxiliary tunnel 1, and when the gas concentration data continues to be greater than or equal to the first preset threshold within the first preset period, the control system controls the valve of the storage device 3 to open ;

[0051] b. After the storage device 3 releases gas, when the gas concentration data continues to be less than the second preset threshold within the second preset period, the control system controls the valve of the storage device 3 to close;

[0052] c. Repeat steps a-b.

[0053] Because the main components of gas gas are alkanes, among which methane accounts for the vast majority, therefore, if the gas concentration collection...

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PUM

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Abstract

The invention discloses a gas drainage system of a service gallery. The gas drainage system includes a ventilation opening which communicates with the service gallery, the ventilation opening can be used for placing storage devices, the storage devices are provided with valves, gas concentration collection components are arranged in the service gallery, the valves and the gas concentration collection components all communicate with a control system, the control system controls the opening and closing of the valves according to collected data of the gas concentration collection components, andthe valves of the storage devices can release gas when being opened. The gas drainage system can effectively reduce the concentration of the gas in the closed service gallery, eliminates the risk of gas explosion, avoids accidents, improves the safety of tunnel operation, ensures the safety of personnel and property, effectively saves labor costs, is scientific and efficient, and has good application prospects.

Description

technical field [0001] The invention relates to the technical field of tunnel engineering, in particular to a gas discharge system for auxiliary tunnels. Background technique [0002] Gas refers to the general term for various harmful gases overflowing from coal seams or rock formations. Its main component is methane. Since methane is flammable and explosive, it will pose a huge safety hazard to the construction and operation of tunnels. [0003] In the prior art, the gas prevention and control in the tunnel is mainly carried out by means of sealing and ventilation in the tunnel. The main measures include: (1) the tunnel lining is fully sealed with water-proof layer and other coiled materials; (3) Implement forced ventilation in the tunnel according to the gas concentration. As the tunnel mainly adopts the blocking method for gas prevention and control, only a very small amount of the gas gas behind the lining is drawn out through infiltration and the drainage structure of ...

Claims

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Application Information

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IPC IPC(8): E21F7/00E21F5/00
CPCE21F7/00E21F5/00
Inventor 范雲鹤喻渝罗禄森赵万强刘洋郑长青周路军周羽哲何思江徐郅崴唐靖王云毅
Owner CHINA RAILWAY ERYUAN ENG GRP CO LTD
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