The technology of controlling dust with foam for fully mechanized excavation face of large cross-section rock tunnel
Abstract：To solve the problem of high dust concentration caused by rock tunnel excavation, in view of the character- istics of dust produced and analyzing the processes of roadheader cutting rock, the paper used Fluent software to carry on numerical simulation of dust movement and analyse the dust characteristics of motion and concentration distribu- tion. Simultaneously, this paper designed the foam dust suppression system applied to fully mechanize large cross-section rock tunnel excavation on the principle of foam dust suppression, and put it into application at the driving face of the north main haulage roadway in Zhuxianzhuang Coal Mine, Huaibei Mining Co. , Ltd. The results show that the dust concentration on the exhaust section of the driving face, reaches a maximum at the leeward side of dust source. Foam making by the foam dust suppression system can enclose roadheader' s cutting head and cover palisades, reaching the results of wetting rock, reducing dust content, depressing the generation of dust and blocking the spreading alleyway. The average dust-settling effect is 86.2% and 84. 4% for the total dust and respirable dust,and the effect is 3.6 and 4.6 times comparing with water spray, achieving a good effect.
Keywords：large cross-sectionrock roadwaycomprehensive excavation facefoamdust control
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1859-1864 )