Site Assessment for Astroparticle Detector Location in Evaporites of the Polkowice-Sieroszowice Copper Ore Mine, Poland

Abstract

The aim of the work was to evaluate the possibilities of excavating a chamber for the Glacier detector, a cylinder with a 74 m diameter and 38 m height filled with 100 kT of liquid argon, in the Polkowice-Sieroszowice copper ore mine in the Legnica-Glogow Copper Area (LGOM). Two potential locations were analyzed in a rock salt layer more than 100 m thick at the depth of 1000 m and in the anhydrite layer of about 100 m thick at the depth of 650 m, both lying above the copper ore deposit. The numerical analyses, based on geological, geophysical, and geomechanical research, were carried out to determine the behavior of the system of the chamber and surrounding rock mass. Two creep laws have been adopted for rock salt in the numerical models, Norton and Lubby2. Their coefficients have been adjusted forin situmeasurements of the mine galleries convergence starting from the results of laboratory tests. Displacement and stresses of the rock salt in the chamber vicinity are much greater for the Lubby2 law. The displacements indicated at the chamber contour are the reason that the alternative location in the anhydrite layer was more advantageous.

Recognition of gasogeodynamic zones in the rock mass using seismic tomography in Rudna copper ore mine

“…A characteristic feature of the deposit area is the non-uniform formation of the lithological structure and diverse mineralization [10]. The variability in the lithological structure of rock types is related to the diverse morphology of the topmost sandstone layer [10][11][12].…”

The influence of regional geological settings on the seismic hazard level in copper mines in the Legnica-Głogów Copper Belt Area (Poland)

“…The Legnica-Głogów Copper Belt Area is a part of the Fore-Sudetic Monocline and its geological structure and tectonic features are determined by particular stages of sedimentation processes and rock mass dislocations [8]. The copper ore deposit there is tectonically disturbed, experiencing seismic activity.…”

Assessment of the impact of an overlying coal seam edge using seismic profiling of refracted Pwave velocity

“…Seismic profiling has been used to evaluate the effectiveness of destressing blasting. Tor et al [21] presented an example of the control of the effectiveness of destressing blasting using seismic profiling in the Jas-Mos coal mine in the region of the 22a longwall in the 510/1 coal seam. The results of profiling have also been used to define a more detailed location for subsequent blastings.…”