Rudarski radovi br 4 2011 - Institut za rudarstvo i metalurgiju Bor

MINING AND METALLURGY INSTITUTE BOR YU ISSN: 1451-0162<br />
COMMITTEE OF UNDERGROUND EXPLOITATION OF THE MINERAL DEPOSITS UDK: 622<br />
UDK: 622.272.3:622.33(045)=20<br />
Mirko Ivković * , Ljubiša Figun, Ivana Živojinović, Svjetlana Ivković<br />
OPTIMIZATION OF NATURAL – TEHNICAL PARAMETERS FOR<br />
THE PILLAR METHOD OF COAL EXCAVATION<br />
Abstract<br />
This work is dedicated to a definition of the optimization methodology of optimization the basic<br />
natural- technical parameters for the pillar method of excavation the dark coal and lignite seams<br />
of larger thickness in complex natural – geological conditions. Mathematical modeling of pillar<br />
excavation parameters was done on the basis of discussed methodological approach.<br />
Key words: mine, excavation, coal<br />
1. INTRODUCTION<br />
The complex exploitation conditions of<br />
coal deposits in Serbia require systematical<br />
operation to the aim of improvement the<br />
method and technology of mining (mining<br />
system), particularly regarded to the<br />
parameters of production, productivity,<br />
safety and economy. Excavation is the main<br />
phase the coal mining that mainly affects the<br />
other phases of process subordinating them<br />
to its ultimate goal. Mining methods and<br />
technologies increasingly affect the way of<br />
deposit opening, while its preparing system<br />
depends entirely on the excavation method.<br />
The main direction of excavation system of<br />
underground coal mining is aimed to<br />
introduction and improvement the methods<br />
of longwall face using the complex<br />
machinery. However, in some deposits, the<br />
natural and geological conditions are such<br />
that they do not allow the use of given<br />
method, so it is necessary to seek the other<br />
specific solution of mining methods.<br />
* JP PEU Resavica<br />
The entire production of the mine with<br />
underground mining in Serbia is carried out<br />
in eight of eleven pit mines, with their<br />
general characteristics of low production,<br />
low level of mechanization and high<br />
proportion of hard physical labor in the total<br />
balance that give the adverse financial<br />
effects of business. Present natural -<br />
geological conditions have influenced the<br />
selection of mining technology solutions, so<br />
that today in all pits the pillar mining<br />
method are applied in different forms, where<br />
the working phases are de-mechanized and<br />
production effects are different, mainly due<br />
to the diversity of exploitation conditions. In<br />
order to improve the effects of use the pillar<br />
stopes in the coal mines in Serbia there is a<br />
need for their rationalization and<br />
optimization of technical - economic<br />
parameters, considering that this mining<br />
method will be a dominant in many mines.<br />
No 4, 2011. 73<br />
MINING ENGINEERING