TITLE:
Application of Roadway Spray Material to Fire Prevention in Goaf Excavation
AUTHORS:
Hao Rong
KEYWORDS:
Goaf Excavation, Thin Layer Spraying, Construction Technology, Shotcrete Plugging, Air Leakage Plugging
JOURNAL NAME:
World Journal of Engineering and Technology,
Vol.12 No.2,
May
17,
2024
ABSTRACT: In order to reduce the risk of spontaneous combustion in goaf during goaf excavation process, polymer modified cement mortar spraying material was used to spray and seal the roadway surface. The experimental application was carried out in the upper channel 2304 of a mine in Henan Province. The test results showed that polymer modified cement mortar spraying material could effectively support the roadway and greatly reduce the deformation rate of the roadway. The best spraying thickness is 5 mm. Through the monitoring of tunnel air leakage, it is concluded that the polymer modified cement mortar spraying material can reduce the tunnel air leakage and play a better sealing effect.