koenenite=[mg7ai4(oh)22]4+.[na4(ca,mg)2ci12]4- , is a typical non-silicate clay mineral of oceanic salt deposits which also widely occurs in salt clay, anhydrite, halite, and potash-bearing rocks. koenenite is found as an undesirable sludge-forming component in the processing of potassium salts . koenenite was first reported, in 1902, as an impurity in a fairly pure halite from the justus! pota...

The Cantacuzino Mine was mined with small rooms and square pillars, on seven levels, over a period of 27 years, extracting 2.3 million m 3 rock salt. Due to the specific geo-mining conditions, support structures suffered different degrees deformation, especially cracking ceilings between first 5 levels. This article presents 3D finite element analysis, in elasto-plasticity, state stress strain ...

sarcheshmeh copper mine, with the final reserves of 828 million tons of sulfur ore and average grade of 0.74%, is known to be the largest open pit of iran and most probably the second largest copper mine in the world. this mine is located in the seismotectonic zone of central-iran, and 23 km away from the 150 km long rafsanjan active fault.in this study the vulnerability of the west wall of the...

Abstract The exploitation of the XIV horizon, in two slices, across entire mining perimeter Slănic Prahova Salt Mine until end 2059 will result amplification surface subsidence, already affected by operations Victoria, Cantacuzino, and Old Mines. Systematic annual monitoring ground deformation has been conducted since 2004 through geometric leveling along selected representative alignments, whi...