Posts filed under Mining

Seepage flow modeling from mine waste dump with MODFLOW

This example is a simulation of a mining dump, which is a continuous source of concentrated leachate.

Hydrogeological complexities to consider: heterogeneity of the aquifer and the presence of fractured rock.

Groundwater system parameters:

 

 

Water and mining conflicts in the information age

My father was an olive farmer and very active on the valley olive farmer association in Peru. In the eighties, there was a tailings spill that afected the river water and the irrigated lands. Based on what they could understand of contamination and water chemistry, they had the iniciative of taking water samples and show them to water authorities.

Posted on February 10, 2014 and filed under Environment, Mining, Water management.

 

 

Soil cover system design for mine waste dumps

 

Surface water and groundwater surrounding a mining operation can be significantly affected by contaminated seepage from the Acid Rock Drainage (ARD) in the waste-dumps and tailings deposits. An evaluation for prevention and mitigation of environmental impacts generated by the DAR is necessary to minimize the impact to the environment.

Posted on October 4, 2013 and filed under Mining, Water quality.

 

 

Tailing and waste dump seepage evaluation and remediation

 

Current and historical mining activities have a seepage and waste-dumps legacy that are the concern for mining companies, population and regulatory authorities. Old waste-dumps have not been regulated and most of the old tailings have been deposited in soils without covering. Tailing deposits and waste-dumps should be analyzed in a particular way because of the ground, instalation details, mineralized body geology, mined type, weather and other parameters.

 

 

Main predictive simulations for an EIA in mining

 

Impact assessment of mining projects on groundwater resources can be a challenging task due to uncertainty on groundwater flow regime, the complex numerical tools to successfully simulate stresses on groundwater resources posed by mining projects, and timeframe and budget of the EIAs.

 

 

Bioremediation of tailings and waste dumps

Mining processes of mineral extraction are neither completely efficient nor able to recover all expended and reusable reagents and chemicals from them. Process effluents known as tailings are generally stored in surface reservoirs; in recent times of high volume related to the current extensive exploitation of low grade ores.

Posted on October 1, 2013 and filed under Mining, Water quality.