Abstract
Reclamation of post-mining areas is one of the most important duties of an entrepreneur involved in mining mineral resources with the use of surface techniques. There are various forms of reclamation activities that depend on the chosen reclamation direction and intended function of the reclaimed object as well as from the type of the mined mineral. When there is water present in the mining excavation, we are talking about the aquatic direction of reclamation. This particular type of post-mining area requires a particular shape—especially if its intended future function is recreational. This research addresses optimization-related analyses and calculations of slope inclination in water reservoirs formed in post-mining excavations of both clastic and clay rock raw materials. Considering the conditions of stability and load-bearing capacity of water reservoir slopes, their optimum slopes were determined using the FlexPDE v 6.0 program, based on a two-dimensional elastoplastic model from the Coulomb–Mohr criterion. The inclinations of 1:5 and 1:15 are proposed, respectively, for the above-waterline and below-waterline slopes that serve a beach function. Slopes that do not serve a beach function are proposed to have an inclination of 1:2. Obviously, the strength conditions in the soil medium as well as the comfort of users were key drivers when it comes to selection of the slope inclinations.
Highlights
The final phase of each mining projects is, last but definitely not the least, reclamation of a post-mining area
It is an obligation that each mining entrepreneur involved in a mining activity should be aware of
Reclamation as a concept in mining is expressed in the form of a reclamation direction
Summary
The final phase of each mining projects is, last but definitely not the least, reclamation of a post-mining area. Due to the specific character of rock mining, entrepreneurs frequently render the mining area available for reclamation only at the end of the mine life, i.e., in the last phase of mining operations (the closure phase) In many cases, this last phase is the least profitable in the mine’s typical lifecycle—the production lowers so the revenue flow from mining production significantly decreases or even completely stops. Appropriate planning scope of such to be performed at production stage may even result in decreasing the final reclamation costs. The is is toto propose and optimize thethe (change in in slope slope inclination) inclination)related relatedto tothe theinclinations inclinationsof ofslopes slopesof ofwawater reclamation works
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