<> "The repository administrator has not yet configured an RDF license."^^ . <> . . . "The seismic activity due to the bending on exploited seam roof"^^ . "Risk estimation of strong mining tremors in underground mines, only from seismological observations, is not\nsatisfactory. In Poland a strong sedimentary layers appear over exploited seams and most of seismic events\nis located in roof layers. It seems to be important for seismic activity a bending roof layer into old workers.\nThe plastic deformations and yield fracturing in result of bending are treated in this paper as the main source\nof seismic events. Dynamic temporal evolution of the rupturing process is related to the event distribution.\nThe elastic stresses have compressed character in the layer underside, while at its overside layer is\nstretched. Dislocation creep in the external parts of layer may accelerate the fracture deformation. The plane\nof failure is formed and the seismic events are related to this surface. The seismic data presented in the\npaper, has been recorded and collected in the copper mines in Poland. When the fracture is developing in\noverside of the layer the energy of events related to this fracture is limited. The penetration of fracture up\nover layer border or more dangerously down into underside of layer intensively enlarge rupture surface and\nincreases the energy of seismic events related to it. The changes of seismic surface area can be recognized\nfrom analyze of the hypocenter position and mining observations."^^ . "2011-09" . . . . . . . . "Henryk"^^ . "Marcak"^^ . "Henryk Marcak"^^ . . . . "22nd World Mining Congress & Expo"^^ . . . . . "Istanbul"^^ . . . . . . "The seismic activity due to the bending on exploited seam roof (Text)"^^ . . . . . "Marcak_2011_THE SEISMIC ACTIVITY DUE TO THE BENDING OG EXPLOITED SEAM ROOF.pdf"^^ . . . "The seismic activity due to the bending on exploited seam roof (Other)"^^ . . . . . . "indexcodes.txt"^^ . . . "The seismic activity due to the bending on exploited seam roof (Other)"^^ . . . . . . "lightbox.jpg"^^ . . . "The seismic activity due to the bending on exploited seam roof (Other)"^^ . . . . . . "preview.jpg"^^ . . . "The seismic activity due to the bending on exploited seam roof (Other)"^^ . . . . . . "medium.jpg"^^ . . . "The seismic activity due to the bending on exploited seam roof (Other)"^^ . . . . . . "small.jpg"^^ . . "HTML Summary of #158 \n\nThe seismic activity due to the bending on exploited seam roof\n\n" . "text/html" . . . "Legnica-Glogow Copper District" . . . "Underground mining" . . . "Method and procesing" . .