🔥 Cleaning sump drains or eliminating the source: how to actually reduce mine water contamination? Siltation of water collectors is a major challenge for any mine. The settling of suspended particles reduces the effective volume of sumps, decreases pump service life, and forces regular shutdowns of the drainage system for cleaning with heavy machinery. This problem is particularly acute at kimberlite mines that have reached their design capacity. In a study published in our journal, a detailed analysis and mathematical modeling of sludge formation sources was carried out using the example of mines with different mining systems. What did the source ranking show? 🔹 For mines with backfilling of mined-out voids (using the example of the Mir mine), the main sources of contamination are: ✔️ excavation of rocks by roadheaders – 36 %; ✔️ flushing of the backfilling pipeline – 29 %; ✔️ ore spillage during transfer from the feeder to the conveyor belt – 24 %. 🔹 For mines using block caving (using the example of the Udachny mine), the situation is fundamentally different: the dominant source is ore spillage from the conveyor belt, accounting for about 80 % of the total sludge volume. ❗️ Key finding: ore spillage is the main contributor of solid impurities to mine water for both types of mines. Therefore, contamination should be tackled where it originates – in the transfer zone, before it comes into contact with water. Technological solution: For this purpose, a mechanized system for collecting spilled ore directly under the conveyor (where 65–70 % of spillage accumulates) has been developed. Its key component is a collecting and loading unit, which moves the sludge into a separate tank for subsequent disposal (e.g., feeding it back onto the conveyor), preventing water from contacting the settled material. Benefits of implementation: ✅ Reduction of mine water contamination: by ~16 % for mines with backfilling, and by a factor of 2 for mines with block caving. ✅ Reduction in repair costs for load–haul–dump (LHD) machines operating in silted workings. And most importantly, the economics: 💰 Expected payback period using the Udachny mine as an example – 10 months; 💰 Estimated annual benefit after payback – 4 million RUB, and considering the avoided purchase of an additional LHD machine, the savings increase many times over. 📖 For details on the design of the collecting and loading unit, how LHD costs change, and the engineering solutions incorporated into the project – see the full text of the article: 🔗 Ovchinnikov N.P. Reducing mine water contamination at the local drainage facility of a kimberlite mine. Mining Science and Technology (Russia). 2025;10(2):169–179. https://doi.org/10.17073/2500-0632-2024-07-274 🔔 For more research and solutions for the mining industry – follow our Telegram channel: t.me/MinSciTech #inEnglish #MST #KimberliteMines #MineWater #Drainage #MiningEquipment #MiningMachinery #EnergyEfficiency #ALROSA