Coal mine drainage is the "lifeline" for ensuring the safety of underground operations. It must not only cope with the impact of sudden water inrush, but also withstand the abrasion caused by coal slime and impurities, while adapting to complex working conditions such as high lift and high pressure. Which type of pump is the best choice for coal mine drainage? The transformation case of a large coal mine in Shanxi Province may provide a clear answer.
Previously, this coal mine used ordinary centrifugal pumps for drainage, which was plagued by frequent problems: the impellers were often worn by coal gangue particles in the underground water inrush, requiring shutdown for maintenance every 3 months on average; when sudden water inrush occurred in the rainy season, the pump's flow rate and lift were insufficient, leading to water accumulation hazards on multiple occasions. To completely solve these problems, the coal mine's technical team, in collaboration with pump industry experts, conducted research and finally decided to carry out a comprehensive replacement of the pumps.
The core advantages of this pump perfectly meet the needs of coal mine drainage:
- Its flow-passing components are made of high-chromium alloy, whose wear resistance is 3 times higher than that of ordinary pumps. After the transformation, the maintenance cycle has been extended to 12 months, and the annual maintenance cost has been reduced by 60%.
- The optimized hydraulic model enables the lift to reach over 200 meters and the flow rate to reach 500 m³/h, allowing for rapid pumping and drainage during rainy season water inrush. During the flood season last year, it only took 4 hours to drain 8,000 cubic meters of sudden underground water accumulation.
- Meanwhile, it is equipped with an intelligent monitoring system that can real-time monitor parameters such as pump body temperature and vibration, realizing early fault warning and avoiding unplanned shutdowns.
Since it was put into use one year ago, the coal mine has not been affected by drainage problems in production, and the safety factor has been significantly improved. In fact, there is no absolute standard for the "best choice" of coal mine drainage pumps. However, mining wear-resistant centrifugal drainage pumps have become the consensus choice for most coal mines due to their core characteristics of wear resistance, high efficiency and stability, as well as their super adaptability to complex working conditions of coal mines. Of course, the specific selection still needs to be combined with the actual conditions such as mine depth, water inflow and medium composition, and a customized plan should be formulated through professional calculation.
