Study of Coal Burst Source Locations in the Velenje Colliery

Goran Vižintin, Maja Kocjančič and Milivoj Vulić
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Goran Vižintin: Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva Street 12, Ljubljana SI-1000, Slovenia
Maja Kocjančič: Hydrogeology, Geotechnology, Ecology, Monitoring d.o.o., Zaloška Street 143, Ljubljana SI-1000, Slovenia
Milivoj Vulić: Faculty of Natural Sciences and Engineering, University of Ljubljana, Aškerčeva Street 12, Ljubljana SI-1000, Slovenia

Energies, 2016, vol. 9, issue 7, 1-15

Abstract: The Velenje coal mine (VCM) is situated on the largest Slovenian coal deposit and in one of the thickest layers of coal known in the world. The thickness of the coal layer causes problems for the efficiency of extraction, since the majority of mining operations is within the coal layer. The selected longwall coal mining method with specific geometry, increasing depth of excavations, changes in stress state and naturally given geomechanical properties of rocks induce seismic events. Induced seismic events can be caused by caving processes, blasting or bursts of coal or the surrounding rock. For 2.5D visualization, data of excavations, ash content and calorific value of coal samples, hanging wall and footwall occurrence, subsidence of the surface and coal burst source locations were collected. Data and interpolation methods available in software package Surfer ® 12 were statistically analyzed and a Kriging (KRG) interpolation method was chosen. As a result 2.5D visualizations of coal bursts source locations with geomechanical properties of coal samples taken at different depth in the coal seam in the VCM were made with data-visualization packages Surfer ® 12 and Voxler ® 3.

Keywords: coal burst; mining-induced seismicity; rockburst; Velenje coal mine (VCM) (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2016
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