Arrangement for constructing dams in underground working from powdery construction material and from dam casings

摘要

In an arrangement for constructing dams in underground working from powdery construction material and dam casings, the construction material being pneumatically delivered in the dry state in measured quantities through a conveying line and being blown by sprayed mixing water with a preset water/cement factor into the goaf space, provision is made according to the invention for the spray system (7) of the mixing water to be connected upstream of a connecting conveying line which pneumatically transmits water and solid matter and serves as a mixing section (2) for producing a mortar and from the mouth (26) of which the mortar is discharged in a screen (14, 14a) which defines the dam space at least on two sides (Fig. 3). IMAGE