The 3307 transportation roadway of A Coal Mine in Shanxi Province has achieved rapid excavation of large cross-section tunnels by introducing advanced MB670-Ⅰ type excavation anchor integrated machine and hydraulic anchor rod drilling vehicle.However,high concentration dust in the face during tunnel excavation has become one of the unfavorable factors restricting rapid excavation of tunnels.An analysis was conducted on the existing dust control measures based on the on-site conditions of 3307 transportation roadway and the production process of excavation equipment.It was proposed to achieve efficient dust control by adding an airborne dust removal system.Specifically,KCS-450D-Ⅰ dust collector was added to the MB670-Ⅰanchor excavator integrated machine,and the attached wall duct was added to the air supply duct near the outlet.Through the cooperation of the dust collector and the attached wall duct,the high concentration of dust in the driving head was controlled in the head position,and the amount of dust overflow was reduced.KCS-450D-Ⅰ dust collector has the advantages of strong processing capacity and high efficiency to centrally treat the head-on air with high concentration of dust and reduce the mass concentration of dust in roadway.After engineering application,the largest mass concentrations of respiratory dust and total dust in the front of tunnel excavation were 29.52,89.73 mg/m3 respectively,and the dust control effect was significant.
关键词
大断面巷道/综掘/机载除尘系统/粉尘治理
Key words
cross-section tunnel/fully mechanized excavating/airborne dust removal system/dust control
维普
万方数据