In view of the problems of high dust concentration during the mining period of 30603 fully mechanized mining face,the existing spray dust reduction measures are not obvious,and combined with the field situation of the mining face,it is proposed to apply dynamic pressure and static pressure water injection methods to the mining face water injection.Specifically,dynamic pressure water injection will be carried out using the existing gas extraction boreholes in the 30603 return airway,and short boreholes will be arranged on the mining face for static pressure water injection.Detailed analysis will be conducted on the layout of the mining face water injection holes and the water injection process.After on-site application,the water content of the coal seam in the water injection area of the mining face increased to between 1.98%and 2.94%,and the dust concentration in the mining face was controlled at 187.2 and 102.1 mg/m3,achieving good dust prevention effect.
维普
万方数据