Research on Dust Control at the Transfer Point of Coal Mine Ground Belt Conveyor
Due to the 103 transfer point of the ground surface belt coal flow system in Mindong No.1 Mine is located in the ground surface transportation factory building,the space is relatively open and is easily affected by climate and environmental factors.Most of the dust governance measures suitable for the coal mine downhole have a serious decrease in dust reduction efficiency in winter when the temperature is relatively low.In addition,due to factors of equipment itself and design problems,the dust governance effect is not good.In response to the difficult dust prevention and control problem at the ground surface belt 103 transfer point in Mindong No.1 Mine,facilities and equipment such as bag precipitators,dust removal pipelines,dust enclosed hoods and others are designed and installed,and matched and optimized for type selection.The designed and optimized equipment is applied and verified on site.The application finds that the average total dust concentration in the working environment of personnel at the 103 transfer point decreases from 185.72 mg/m3 to 6.14 mg/m3,the average respiratory dust concentration decreases from 77.31 mg/m3 to 3.28 mg/m3,the time weighted average concentration of total dust concentration decreases from 116.08 mg/m3 to 3.84 mg/m3,and the dust reduction efficiency is 96.7%.The time weighted average concentration of respiratory dust concentration decreases from 48.32 mg/m3 to 2.05 mg/m3,and the dust reduction efficiency is 95.8%.The overall dust reduction efficiency is excellent.
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