DOI: 10.11799/ce202507016
Spray dust suppression technology in rapid excavation face of half coal-rock roadway based on compound surfactant
WANG Zhirong
GONG Xiaobing
LI Bai
LU Ke
Abstract：In order to solve the problem of poor dust suppression effect of the mounted external spray dust suppression system in the half coal rock roadway excavation face of auxiliary transportation raise in the 31#coal seam of Daliuta Mine,which can not adapt to the coal dust and rock dust control during the tunneling process,based on the coal dust and rock dust samples collected at the working face site,an experimental study on the dust wetting characteristics of the composite surfactant was carried out,and the optimal surfactant composite scheme and proportion were obtained.Through the composite surfactant spray dust suppression test and the excavation simulation test,the spray pressure in the simulated roadway was tested to obtain the dust suppression efficiency improvement effects of the spray dust suppression system after adding the compound surfactant,and the optimal spray pressure was determined.According to the field application results,the dust concentration in the working face dropped notably during coal and rock excavation after adding the compound surfactant to the spray water,the dust concentration at the driver's position and the 15 m along the downwind side declined from 486.27 mg/m3 and 279.33 mg/m3 to 180.20 mg/m3 and 116.80 mg/m3,and the suppression efficiency of total dust and coal dust during excavation reached 62.94%and 58.19%,respectively.
Keywords：spray dust suppressionparticle size distributionsurfactantdust concentration
Publication Date：2025-07-20
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：8( 110-117 )