Abstract:

Abstract: To solve the problem of high dust concentration hazard caused by whole rock tunnel excavation，aiming at the rock dust hazards of Zhangji coal mine working face，the paper put forward to create a combined system which gives priority to froth dedusting，dust exhausting fan，assits with the grade purified water curtain and individual protection，and put it into application at the 1123(3)~1124(3) gas drainage lane. The results show that the average dust-settling effect is 92.5% and 96% for the total dust and respirable dust. Cooperating with individual protection and the water curtain，the combined system has achieved a good effect of controlling dust.

Key words: whole rock tunnel, fully mechanized excavation face, dust hazards, comprehensive dust control