Justification of multi-section clay storage parameters on the pit internal dump during the integrated use mining of placer deposits

Abstract

Purpose is an establishment of efficient parameters of a multi-section man-made deposit at the pulp clays storage on the surface of internal pit dumps during the development of placer deposits. The analytical research method was used to establish the main parameters of man-made deposits sections depending on their width and depth. A graphical research method was used to establish the downtime duration between formation of the first and second sections of the man-made deposit. It is established that division of the man-made deposit into five sections parallel to the mining front reduces time period till start of its operation from 8 to 5 years for it thickness 10 m and from 7 to 5 years at thickness 20 m. However, a significant disadvantage is the increassd number of sections in the man-made deposit from 2 to 5 is an increase in the volume of construction work from 0.27 to 1.11 million m3 at thickness 10 m, and from 0.53 to 2.15 million m3 at thickness 20 m, which confirms the necessity to find an effective number of sections in the man-made deposit and their parameters. The dependence between beginning of the works on filling the man-made deposit and the width of its first section delays start of the filling works, but too small width causes downtime at transiting from the first section to the second one. Efficient width of the man-made deposit first section is established, in which downtime is reduced from 7 years to 5.8 years, and volume of raw materials located outside the pit is reduced by 0.1 - 0.5 million m3 depending on the width of the first section. A method is proposed for determining an effective width of the first section in a two-section man-caused deposit, in which occurs while filling the sections. It is established that effective width of the first section oin the two-section man-made deposit with thickness of 10 m and with parameters of a typical pit development at mining of titanium-zirconium deposit is 241 m.