... well recognised that regions of increased stress within the roof-pillar system, indicative of high risk standing workings, can also be seismically imaged as regions of higher seismic velocity. Demonstrations of this approach are provided by two case studies from Australian coalfields. The first study...

... Reservoir Characterization vicinity normal load bearing capacity internal friction coalfield overburden calculation metals & mining residual load stability dimension coalface convergence application roadway collapsible overburden equation procedure roof bolt rock mass...

... ABSTRACT: In this research study I have presented the results of monitoring and measuring of the instability appearance on the large open-pit coalfield mines in Serbia like: KOLUBARA, KOSOVO, KOSTOLAC, as well as the possibility of caving time forecast and/or caving preventing. RESUME: Dans...

... coalfield seam landslide event east pentwyn Reservoir Characterization south wales coalfield failure surface pillar metals & mining stability analysis floor rock landslide displacement hillside subsidence interaction finite element analysis remnant pillar Landslides...

... INTRODUCTION The rock bursts prevention has been in the centre of ,interest in the OSTRAVA-KARVINA Coalfield since early 40-ies. Nevertheless, the problems accomplished with rock bursts are urgent up to now. The main reason of this fact is the mining activity carried out in permanently changing conditions...

... and pillar workings. 2. SURFACE MOVEMENTS DUE TO EXTRACTION OF PILLARS IN A THICK SEAt1 UNDERLYING TWO WORKED SEAMS The investigations were carried on over XV seam (5,4 m thick) workings at Pootki Colliery in the Jharia Coalfield. At the site of investi- gations, two seams, XVI (4,2 m thick) and XVIA (2,44 m...