Method and experiment system for simulating tunneling gas migration rule of coal mine

An experimental system and roadway technology, applied in the direction of gas discharge, mining equipment, earthwork drilling and mining, etc., can solve the problems of large size and unsuitability

Inactive Publication Date: 2012-10-17
BEIJING UNION UNIVERSITY
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Problems solved by technology

The model is basically a mock-up with a large volume and is not suitable for general laboratory applications

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  • Method and experiment system for simulating tunneling gas migration rule of coal mine
  • Method and experiment system for simulating tunneling gas migration rule of coal mine
  • Method and experiment system for simulating tunneling gas migration rule of coal mine

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Embodiment Construction

[0013] The purpose of the present invention is to qualitatively simulate the migration characteristics of the gas gushing out of the real coal mine tunnel under the action of the wind flow field by considering the influence of the wall surface roughness on the wind flow and gas movement under the action of multiple physical fields. Detecting parameters such as gas concentration and wind speed at multiple points in the roadway provides accurate and reliable experimental basis for the quantitative study of gas accidents that may occur in coal mine tunneling roadways, and provides a basis for control strategies for the tunneling roadway gas discharge system.

[0014] as attached figure 1 As shown, the experimental system for simulating the law of gas migration in coal mine excavation roadways involved in the present invention includes a roadway simulation device 1, a gas gushing source device 2, a data acquisition device 3, a temperature and humidity testing and adjustment device ...

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Abstract

The invention relates to a method and an experiment system for simulating a tunneling gas migration rule of a coal mine, aiming at providing a theory basis for safely and fast discharging gas. The invention discloses the method and the experiment system for simulating tunneling gas migration rule, firstly the tunneling experiment system is built, and then gas migration rules under turbulent jet action can be deeply explored by using orientated and quantitative methods under semi-closed condition, wherein the qualitative method is of non-contact measurement, qualitative analysis is conducted on the basis of not interfering flow field running characteristic, and the analysis result can be used as a basis of sensor arrangement in quantitative experiments. The quantitative method comprises the steps of arranging various sensors through multifunctional operation holes on a tunnel model, and exploring the tunneling gas migration rules through data analysis. The method and the experiment system can provide theory and data bases for fan control strategy under the normal ventilation and gas emission condition of tunnels, and also can provide guidance for preventing the gas explosion accidents in the tunnels.

Description

technical field [0001] The invention relates to the field of mine ventilation engineering research, in particular to a method and an experiment system for simulating the migration law of gas in coal mine tunneling roadways. Background technique [0002] Most of the excavation roadways are located in the new development area of ​​the coal seam, and the amount of gas gushing out is large. If the ventilation is insufficient, the gas accumulation will reach an explosive concentration; in order to ensure the health of the workers at the working face, fresh air must be continuously introduced, which naturally increases the oxygen concentration; Or, there are many factors that cause sparks in the roadway of the roadheader, all of which are easy to ignite and detonate the gas at the explosion point, causing accidents. Gas control in tunneling roadway is the focus and difficulty of coal mine gas control. After drilling and drainage, there is still a large amount of gas continuously ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F7/00
Inventor 王淑芳赵林惠张建成李一男
Owner BEIJING UNION UNIVERSITY
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