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A multi-dimensional coupling method for calculating mine whole-wind-network outburst shock wave propagation characteristics

A calculation method and shock wave technology, applied in calculation, design optimization/simulation, special data processing applications, etc., can solve problems such as large calculation volume, complex wind path, and difficult simulation, and achieve the effect of reducing calculation volume and reliable results

Pending Publication Date: 2019-04-02
CHINA UNIV OF MINING & TECH (BEIJING)
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Problems solved by technology

In addition, for the mine's entire wind network, due to problems such as complex wind paths and long lines, the amount of calculation is large and the simulation is difficult

Method used

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  • A multi-dimensional coupling method for calculating mine whole-wind-network outburst shock wave propagation characteristics
  • A multi-dimensional coupling method for calculating mine whole-wind-network outburst shock wave propagation characteristics

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Embodiment Construction

[0021] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0022] The process and embodiment of a multi-dimensional coupling method for calculating the propagation characteristics of prominent shock waves in the mine's entire wind network described in the present invention are described in detail as follows in conjunction with the accompanying drawings:

[0023] Such as figure 1 As shown, the process of MPCCI co-simulation to realize multi-dimensional coupling calculation is divided into four parts: model file preparation, definition of coupling process, simulation operation and post-processing:

[0024] Model file preparation: Before coupling, for different coupling areas, it is necessary to establish corresponding physical geometry models in their respective software (ie, FLUENT and Flowmaster), so that they ...

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Abstract

The invention discloses a multi-dimensional coupling method for calculating mine whole wind network outburst shock wave propagation characteristics. The multi-dimensional coupling method comprises outburst source near source roadway FLUENT multi-dimensional calculation, far source roadway Flowmaster one-dimensional calculation and an MPCCI multi-dimensional coupling calculation method. Aiming at the characteristics of impinging airflow around the prominent source roadway, a two-phase flow model of pulverized coal gas and solid gas is established. By utilizing FLUENT calculation simulation, attenuation characteristics and attenuation factors of outburst shock waves under different roadway types are obtained. On the basis of the conclusion, one-dimensional simplification is performed on a far-source tunnel branch, an equivalent pressure loss and an outburst pressure source equivalent attenuation curve of a tunnel structure are determined, and propagation characteristics of outburst shockwaves of the far-source tunnel are calculated by means of Flowmaster software. MPCCI software is further adopted for coupling and solving the outburst shock waves in an outburst source near-source tunnel (FLUENT multi-dimensional calculation model); and highlighting a Flowmaster one-dimensional calculation model and the variation trend of the impact pressure at the coupling surface, thereby obtaining the propagation characteristics of the highlighted shock waves in the whole underground air network. Through the method, the propagation characteristics of the outburst shock waves in the mine whole wind network can be efficiently and accurately calculated.

Description

technical field [0001] The invention relates to a method for calculating the propagation of outburst shock waves, in particular to a multi-dimensional coupling method for calculating the propagation characteristics of outburst shock waves in the mine's entire wind network. Background technique [0002] The impingement airflow in the roadway around the coal and gas outburst source is formed by the expansion gas flow carrying a large amount of coal powder, with fast propagation speed, obvious turbulence effect, and the airflow has obvious gas-solid dual-phase characteristics. Pulverized coal particles play an obvious role in the characteristics of airflow movement. Their mass is relatively large, their acceleration is small, and there is relative motion between them and the gas. There are also collisions and friction between particles, and they are also affected by the drag force of the fluid. , exhibiting a significant energy-dissipating retardation effect. At present, when ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 周爱桃张蒙王凯冯天飞范灵鹏
Owner CHINA UNIV OF MINING & TECH (BEIJING)
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