Об одной из причин нарушения надежной и безопасной работы рудничной водоотливной установки

Abstract

The Russian Federation is one of the world leaders in diamond mining. Currently, the predominant part (about 95 %) of all the Russian diamonds is mined at the ore (kimberlite) and alluvial deposits located on the territory of Yakutia. Practice shows that the underground development of kimberlite deposits in the territory of Western Yakutia is associated with an abundant flow of mine water into the mine workings. Without the use of a sufficient amount of pumping equipment, mine waters make the process of mining diamond-bearing ores more difficult, and most importantly, unsafe for the operating personnel. Currently, electric pump units of sectional type are used to combat the mine waterways at the kimberlite mines. In order to ensure safe mining of deposits of the solid minerals by the underground method, and to avoid flooding of the mine workings, the pumping equipment of the main drainage plant must always be in the working order, which is ensured by increasing its operational reliability. One of the probable reasons for a significant deterioration in the performance and reliability of sectional pumps is considered. As a material for analysis, practical data on the operation of the main drainage plant of the Udachny underground mine were taken. It is established that the reason for a significant deterioration in the performance of sectional pumps can be an increase in the cylindrical gap of the hydraulic heel assembly. It is shown that the increase in the gap is associated with a decrease in the outer diameter of the cylinder of the unloading disk. A significant reduction in the size of the cylinder can occur as a result of the total impact of such negative factors: an increase in the concentration of mechanical impurities in the mine water passing through the cylindrical gap of the hydraulic heel assembly; uneven distribution of pressure in the gap due to unskilled repair of the discharge cover.