Water Services and Technologies was invited to participate in the First Digital Hydroinformatics Seminar, whose main theme is “Innovative Solutions for Modeling Aquatic Environments”, from November 9th to 13th. The event will take place in online format and is organized by Hydroinfo and supported by DHI.
DHI is the developer of a series of software solutions for all types of aquatic environments: coastal, surface marine and underground, for applications in both natural and urban environments and in projects such as mining, industrial, etc. Among the solutions developed by DHI is FEFLOW, one of the most powerful groundwater modeling software today and in which Water Services and Technologies is a reference in Brazil and the world for teaching and applications.
The event is organized into five categories:
Coasts and Seas
Hydrogeology and Mining
Inland Water and Water Resources
General and News
In the “Hydrogeology and Mining” category, the WST will present two lectures on November 12th. The first will be given by the president of Water Services and Technologies, Nilson Guiguer, Ph.D., on “Simulation of Underground Mine Drainage in Karst Environments”, and at 2 pm on the same day, Danilo Almeida, M.Sc., director of projects, will give the lecture “Mine closure with pit filling with tailings: hydrogeological and geotechnical integrated modelling”.
See below for more information about the lectures given by professionals from Water Services and Technologies:
This lecture will present how FEFLOW has been used successfully over the past 13 years to predict the expected flows and drawdowns for the drainage of the Vazante mine. This mine has a pumping capacity of about 14 m3/s and has the challenges of being located in a karst environment, crossing several geological structures and faults and being flanked by a river that provides a large part of the flow entering the mine, even drying up in some periods of the year. It will also be demonstrated how the MIKE River river runoff model can be coupled with FEFLOW to do an integrated surface and groundwater modeling.
After the closure of mines with open pits, typically the pumping used to lower the water table ceases and there is a recovery of the water level, forming a lake. There is a need to predict the recovery of the level with time due to three factors: the recovery of pore pressures on the slope should not be so fast as to compromise its stability; understand how level recovery affects the base flow of surrounding rivers and springs and know maximum lake level and spillage points. More recently, inactive pits have been used to dispose of tailings, thus minimizing the need for tailings dams. With the compaction of this tailings as the height of the deposit increases, there is an expulsion of water from the compacted pores and, therefore, it is necessary to use models that allow representing this compaction to correctly predict the recovery of the water level. This presentation will present a solution using FEFLOW together with a plug-in to represent this phenomenon. A comparison will be made considering or not the compression in the final result.