Parameters of selective martite ores disintegration in structured ore bodies deposits by borehole hydraulic monitors

The work is aimed at determining parameters of advance
borehole stoping by hydraulic monitors leading to rational use of reserves
structured according to ore types at deposits by means of advance stoping
with selective disintegration of high-grade martite ores. The research
methods include experimental investigations of parameters of breaking a
high-grade martite ore massif by high-pressure water jets of borehole
monitors; laboratory studies of technological properties of hydrodisintegrated
products and their concentratibility; theoretical generalization of
experimental data. The research has resulted in developing experimental
borehole hydraulic monitors and determining basic technical parameters of
high-pressure water jets; determining regularities of hydraulic monitor
disintegration of high-grade martite ores considering structural and
mineralogical characteristics of the ores and hydrodisintegration modes;
proving the fact that the process of high-grade martite ore disintegration by
monitors is also the process of ore disintegration to the level of ore mineral
grain release providing the higher quality disintegration product after
subsequent dewatering than that of the initial one. The scientific novelty of
the research consists in determining a criterion of hydrodisintegration of
martites, conditions of forming a required fractional composition of monitor
disintegration products through controlling stability of a pulse of the water jet
action on the stope face. The practical relevance of the monitor breaking
process in conditions of mining units at deep levels of Kryvbas underground
mines consists in providing advanced stoping of rich martite ores through
raises and obtaining a new kind of product – martite superconcentrate.