Technology and application of multi-material cooperative cementing filling system.

Purpose:In order to reduce the storage of mine solid waste, reduce the disposal cost and improve the recovery rate of underground ore, aiming at the problems of low concentration, difficult flocculation and sedimentation, overflow and mixing in the filling of mine fine filter mud, taking a lead-silver mine in Henan as an example,a precise preparation and filling system process for the co-disposal of filter mud and rice stone was proposed. Method;The basic physical properties,fluidity and strength tests of filter mud and rice stone were carried out. Through theoretical analysis and research, combined with the actual situation on site, the multi-material collaborative cementing filling process of the lead-silver mine was proposed,and the construction and industrial test of the filling system as carried out. Result;l)The particle size of filter mud less than 74 im accounted for 94%. When the ratio of filter mud to rice stone was 5 : 5, the content of filling aggregate below --20 pjn accounted for more than 20%, which could meet the long-distance transportation of filling slurry. 2) The static metering cycle preparation process was adopted. The filter mud was measured by the viscous batching machine,and the rice stone was measured by the conventional batching machine, which could realize the homogeneous dispersion and precise feeding of the viscous filter mud,and ensure the stable and continuous operation of the filling system. 3)In the field industrial test, the filling concentration was 64%, the homogenization degree of the filling slurry was high, the filling system ran [ABSTRACT FROM AUTHOR]