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Analysis method for judging coal mine heading face gas explosion overpressure

A technology for excavating working face and gas explosion, which is applied in mining installations, mining equipment, earth-moving drilling, etc., can solve problems such as deviation of results and large deviation of results, and achieve pertinence, easy operation, and high prediction reliability. Effect

Inactive Publication Date: 2018-01-12
CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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Problems solved by technology

The cost of this type of method is the lowest, but due to certain errors in the operation of model establishment and initial boundary condition loading and on-site operations, the results will be biased
At the same time, since CFD numerical simulation requires a good engineering background and skilled simulation technology as support, otherwise the calculated results will deviate greatly

Method used

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  • Analysis method for judging coal mine heading face gas explosion overpressure
  • Analysis method for judging coal mine heading face gas explosion overpressure
  • Analysis method for judging coal mine heading face gas explosion overpressure

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Embodiment Construction

[0052] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0053] figure 1 Be the flow chart of the present invention, as figure 1 As shown, firstly, the total energy of the gas explosion under different initial states is calculated, and then combined with the knowledge of explosion gas dynamics, a gas explosion overpressure prediction model of the excavation face is established and the prediction calculation is carried out. The overpressure prediction data are compared, and the overpressure prediction model is corrected by combining the experimental data and the gas compression equation to make it closer to the actual value.

[0054] figure 2 It is the overpressure prediction model of the explosion of the present invention. When the gas explosion occurs, the explosion produces strong high-pressure, high-speed shock waves and high-temperature combustion waves, which divide the space into two wav...

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Abstract

The invention relates to an analysis method for judging the coal mine heading face gas explosion overpressure and belongs to the technical field of coal mine gas analysis. The method includes the following steps that S1, the total energy of gas explosion at the different initial states is figured out; S2, a heading face gas explosion overpressure prediction model is established in combination withthe explosion gas dynamics knowledge and prediction calculation is performed; S3, the overpressure prediction module is corrected in combination with experimental data and a gas compression equation;and S4, actual measured explosion overpressure data of a large-size roadway are compared with the overpressure prediction data, and then a gas explosion overpressure correction prediction model is obtained. The analysis method is used for performing probability analysis and intensity analysis prediction of gas explosion in combination with the historical conditions and actual conditions of each mine, and pertinence controlling measures are designed in advance for preventing harm caused by gas explosion impact.

Description

technical field [0001] The invention belongs to the technical field of coal mine gas analysis, and relates to an analysis method for judging the gas explosion overpressure of a coal mine driving face. Background technique [0002] At present, there are many studies on the overpressure consequences of coal mine gas explosions. Much of this research has focused on the extent and consequences of post-explosion overpressure. Mainly because the main injury during the explosion comes from the damage of the overpressure mechanical properties of the shock wave. [0003] Existing technical solutions related to the present invention mainly contain the following categories: [0004] a. Through the large-scale roadway explosion experiment, the overpressure measurement after the explosion is carried out. This kind of method is reliable and the data is stable, but the cost is high, the data collection is difficult, and it is not generalizable; [0005] b. Through the small-scale pipeli...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21F17/00E21F17/18G06Q50/02
Inventor 段玉龙刘洪王文和姚新友廖浩刘克辉巫尚蔚
Owner CHONGQING UNIVERSITY OF SCIENCE AND TECHNOLOGY
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