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

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 ...

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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

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