Improvement of the system of explosions of ring holes during the development of low-power ore deposits
Yegemberdiyev R.E. Stolpovskikh I.N. Kolga A.D.
2023National Academy of Sciences of the Republic of Kazakhstan
News of the National Academy of Sciences of the Republic of Kazakhstan, Series of Geology and Technical Sciences
2023#2023Issue 268 - 76 pp.
Due to the depletion of powerful rich mineral deposits and, accordingly, the transition to the development of low-power ore deposits with a lower content of the useful component, it is possible to increase the efficiency of underground mining by improving individual processes of the most effective development systems that reduce the cost of production with high recovery rates. One of the most common systems for the development of low-power ore deposits is the system of sub-level caving mining, which is widely used both at domestic and foreign underground mines. Improving the efficiency of one of the main processes of this system, which consists in carrying out drilling and blasting operations by improving fragmentation indicators and improving blasting schemes, which can provide higher rates of excavation of rock mass and, consequently, reducing the cost of loading, transportation and increasing the service life of the main nodes and components of loading and unloading and transport equipment. In relation to the conditions of the polymetallic deposit of the Strezhansky mine, studies were carried out on the factors of single blasting separation (SBS) of wells into two parts in a sublevel collapse with the establishment of a rational value of sequential deceleration. It is theoretically justified and experimentally confirmed that the improved SBS method gives higher crushing rates and an increase in mineral extraction in addition to reducing vibration and rock impacts. Analysis of the results of experimental studies allows us to formulate a conclusion that when using an improved method of blasting wells, the percentage of mineral extraction increases by 5-10% compared to existing blasting methods.
Dilution , Disturbed flow , Frontal discharge , Ore loss , Ore mining , Sub-level caving mining
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Satbayev University, Almaty, Kazakhstan
Ural state agrarian university, Ekaterinburg, Russian Federation
Satbayev University
Ural state agrarian university
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