Loading...
Projects / Programmes source: ARIS

ANALYSIS IMPACTS OF THE HIGH PRODUCTIVE LONGWALL COAL EXPLOITATION ON SOUROUNDING GROUND LAYERS AND SURFACE

Research activity

Code Science Field Subfield
2.16.01  Engineering sciences and technologies  Mining and geotechnology  Mining 

Code Science Field
T340  Technological sciences  Mining 
Keywords
underground coal exploitation, hangingwall movements, geomechanical measurements, numerical methods, side wall stability, ground subsidence;
Evaluation (rules)
source: COBISS
Researchers (15)
no. Code Name and surname Research area Role Period No. of publicationsNo. of publications
1.  20119  Jurij Čadež  Mining and geotechnology  Researcher  2008  250 
2.  06225  Branko Debelak  Mechanical design  Technical associate  2009 - 2011  137 
3.  13572  PhD Evgen Dervarič  Mining and geotechnology  Researcher  2008 - 2011  224 
4.  30132  MSc Ludvik Golob  Mining and geotechnology  Researcher  2008 - 2011  41 
5.  11443  PhD Andrej Gosar  Geology  Researcher  2008 - 2009  455 
6.  23629  PhD Damjan Hann  Mining and geotechnology  Researcher  2008 - 2011  31 
7.  25592  PhD Gregor Jeromel  Mining and geotechnology  Junior researcher  2008 - 2010  28 
8.  22918  Robert Lah  Mining and geotechnology  Researcher  2008 - 2011  44 
9.  13459  Marjan Lenart  Geology  Researcher  2008 - 2011  54 
10.  09644  PhD Jakob Likar  Mining and geotechnology  Head  2008 - 2011  1,884 
11.  20517  MSc Janez Mayer  Mining and geotechnology  Researcher  2008 - 2011  70 
12.  00143  PhD Franc Runovc  Electronic components and technologies  Researcher  2008 - 2011  157 
13.  03248  PhD Janez Stražišar  Mining and geotechnology  Researcher  2008  104 
14.  27787  MSc Gregor Vesel  Mining and geotechnology  Researcher  2008  200 
15.  15886  PhD Goran Vižintin  Mining and geotechnology  Researcher  2008 - 2011  487 
Organisations (2)
no. Code Research organisation City Registration number No. of publicationsNo. of publications
1.  1252  The Coal mine Velenje  Velenje  5040361  351 
2.  1555  University of Ljubljana, Faculty of Natural Sciences and Engeneering  Ljubljana  1627074  19,816 
Abstract
The introduction and development of highly productive coal exploitation in the Velenje Coal Mine is indirectly causing extensive stress and deformation changes in the surrounding rock strata and in the coal bed. Concentrated coal exploitation in longwall mining areas, which are characterized by smaller equivalent ground floor areas compared to the geometric characteristics of typical longwall mining areas, is causing extensive vertical and subvertical collapses and shear zones in the hanging wall layers. On one side the rock composition of the hanging wall is extremely heterogeneous, while on the other side it is comprised of water-bearing layers subject to the relatively high pore water pressures, which during extreme and concentrated volume changes can cause transformations in the material properties of groung strata. The complex research project is linked to the long-term monitoring of geological, hydrogeological and geotechnical parameters in the broader area of highly productive long wall stopes, and the conduction of specific investigations in the surrounding mine facilities and on the surface above the mining fields. Speciall attention will be concentrated around global stability assesment on the surface area disturbed by mine exploitation workings and in the edges of influences, which are potential unstable. For this purpose the numerical model will be odapted and adjusted with using distinct finite elements that may be used in simulations of "coal flowing" from hanging wall areas into the excavation areas and in calculations of secondary stress -strain fields in surrounding rock strata, with the possibility of analyzing their effects on water-bearing layers and the ground surface in the affected area.
Significance for science
Oriented research work of the project with emphasis on 2D and 3D numerical analysis with using distinct elements, which allow particles flow in the longwall open space had help to analyzing physical processes of coal exploitation from upper part of stope during longwall advance. The second part of research was done in 3D numerical analysis using FEM in the goal tu determine deformation impact on the surrounding rocks with the emphasis on the stability of the steep edges above the deep coal exploitation areas, including the mine infrastructure, provides the comprehensive information about high intensive stress-strain processes caused by high productivity longwall coal mining. Execution of geotechnical measurements and other observations allow real comparison between the calculated and measured deformation parameters in terms of applicability of selected verification of complex numerical modeling analysis. In addition a part of scientific research aimed to stability analysis of highly sloping edges of the subsidence basin, filled with water as a result of high productivity longwall coal mining. Those slopes are caused potential unstable areas around subsided ground surface regarding with unpredictable fast sliding processes which is real danger for environment.
Significance for the country
The present research project has great importance for Velenje Coal Mine who has taken a part of financing, further particularly for Mining Industry, Energetic System of Slovenia and impact assessment of underground coal mining on environmental protection. First of all it is play important rule for the provision of adequate security situation on the continue longwall coal production in the coal mine, using suitable safety measures. Last but not least the second part of project had aim to determine with complex numerical analysis, real impacts of high productivity longwall coal mining on the surrounding rocks and the surface above the mine exploitation areas. Particularly edges of subsidence basin area on the surface were exposed, where can find places with rock fractures progressive layers in various geological, hydro geological and geotechnical conditions. Since the Republic of Slovenia in future will continue linked to electric energy production from the thermal power plants, the improving of technical conditions of coal underground exploitation is critical to keep continue supply of coal to power plant consumers. This was particularly exposed to strong interest in the transfer of knowledge in similar environment areas in the Republics of former Yugoslavia and the wider South Eastern European countries.
Most important scientific results Annual report 2008, 2009, final report, complete report on dLib.si
Most important socioeconomically and culturally relevant results Annual report 2008, 2009, final report, complete report on dLib.si
Views history
Favourite