A new circulating accumulation emission model for assessing dust emission from open pit mine

Area of Science:

• Environmental Science
• Mining Engineering
• Atmospheric Science

Background:

• Traditional methods for evaluating open pit mine dust rely on external monitoring, leading to inaccuracies.
• Assessing unorganized dust emissions from open pit mines requires improved methodologies.

Purpose of the Study:

• To develop a model for accurately evaluating dust emissions from open pit mines.
• To convert in-pit monitoring data into reliable dust emission estimates.
• To address the limitations of external monitoring for open pit mine dust assessment.

Main Methods:

• Establishment of a circulating accumulation emission model.
• Simulation of dust diffusion using diffusion ratio and surplus ratio.
• Analysis of dust emission, retention, and diffusion dynamics within the mine pit.

Main Results:

• The circulating accumulation emission model effectively simulates dust diffusion in open pit mines.
• Initial dust concentration has minimal impact on the final stable dust value.
• External dust accumulates within the pit due to eddy currents, creating a distinct background value.
• In-pit monitoring data can be reliably converted to dust emissions using the developed model.

Conclusions:

• The circulating accumulation emission model is suitable for open pit mine dust diffusion processes.
• The model provides accurate dust emission calculations from in-pit data.
• This approach is adaptable to environmental changes like wind speed and direction, reducing the need for extensive external equipment.