Emergency control technology of air and smoke flow in mine belt roadway fire based on Ventsim software

Safety in Coal Mines > 2022 > 53(9): 38-46.

Emergency control technology of air and smoke flow in mine belt roadway fire based on Ventsim software[J]. Safety in Coal Mines, 2022, 53(9): 38-46.

Citation:

Emergency control technology of air and smoke flow in mine belt roadway fire based on Ventsim software[J]. Safety in Coal Mines, 2022, 53(9): 38-46.

Citation:

Emergency control technology of air and smoke flow in mine belt roadway fire based on Ventsim software[J]. Safety in Coal Mines, 2022, 53(9): 38-46.

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Emergency control technology of air and smoke flow in mine belt roadway fire based on Ventsim software

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Published Date: September 19, 2022

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Abstract

Abstract

Mine belt fires are prone to cause heavy casualties due to their strong suddenness and difficulty in disaster relief and fire fighting. Quick and effective wind control, smoke exhaust, and evacuation are the keys to disaster relief. By studying the disaster mechanism and prevention and control mechanism of wind and smoke flow of well fire and its secondary disasters, the air volume distribution and air supply path of the original air control and smoke exhaust scheme were optimized, and the emergency linkage control method of wind and smoke flow in different fire scenarios was proposed. Based on the Froude number conservation model（Ｆｒｏｕｄｅ）, the critical conditions for the balance of fire wind and smoke flow in inclined roadways are studied, and the formulas of critical wind speed and minimum exhaust air volume to prevent backsliding of smoke flow are obtained, and the optimal air control and exhaust scheme is quantified. The three-dimensional visualization ventilation network model of Yangchangwan Coal Mine is established by Ventsim software. The spreading law of wind and smoke flow in different fire source point scenarios and the smoke exhaust effect and air volume distribution before and after adopting the air control and smoke exhaust scheme are simulated respectively. The simulation results show that the optimized regulation scheme can not only satisfy the minimum air volume of the smoke control and exhaust path but also ensure the minimum air volume required for the escape of the people in the mining area and the gas dilution. The emergency control plan for catastrophic wind and smoke flow has been further improved.
- belt roadway fire,
- wind control and smoke exhaust,
- emergency regulation,
- Ventism simulation,
- wind flow and smoke of fire

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References

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