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The primary requirement for landscape regeneration affected by mining in addition to restoration of functional use is also the permanent sustainability of landscape. The paper deals with the alternative po ssibilities of using redevelopm ent procedures for general restoration of the landscape, also principles of using spontaneous succession, managed succession, forest and non-forest reclamation (including the recovery of the residential areas) on the basis of ecological and land-technical values and potential of l...

The contribution focuses on the technological possibilities of large-capacity extraction, transport and stacking of loose material. It is based on the actual condition of the continuous-operation equipment deployed at large pit quarries. The technical and performance parameters of this equipment, well-tried in practice, were used for modelling the option of replacing it with discontinuous-operation equipment, which has unique performance parameters compared wi th European standards. The key objective is to compare...

The vast territory of Bince region is loca ted in the Viti locality in the SW part of Kosovo, in between Kacaniku Gorge, Morava of Bince Valley and Zhegra Valley. It is characterized by a broad variety of lithology and numerous mineral showings of Cu, Pb, Zn and Fe. Geological setting: Paleozoic shale (Sbm), with marble and quartzite (M, Q), the series of Upper Cretaceous (Cr 2) flysch, Lower Oligocene (Ol 2) volcanogenic-sedimentary series, middle Miocene (M2) sediments, as well as by relatively widespread deposi...

Underground coal mines explosions generally arise from the inflammation of a methane/air mixture. This explosion can also generate a subsequent coal dust explosion. Traditionally such explosions have being fought eliminating one or several of the factors needed by the explosion to take place. Although several preventive measures are taken to prevent explosions, other measures should be considered to reduce the effects or even to extinguish the flame front. Unlike other protection methods that remove one or two of ...

The shape and geometry of bucket edge, edge and tooth material have a key influence on wheel excavator mining processes efficien cy and power consumption. The frequent change of cutting members due to their wear or break in increases mining process costs, shortens excavator operation time which mean s lower efficiency of the technological complex (TC). Every wear means a change of shape, geometry, eventually material properties of cutting members, but the incr eased power consumption of the mining process as well....

The main objective of geochemical mapping is to recognize the promising areas for the semi-detailed exploration in next steps of geochemical exploration. To reach the goal the thresholds value of each interested elem ent within the geochemical sample should be determined at the prelimin ary step. At the present article , it is attempted to use the raw geochemical data after pre-processing to distinguish the prom ising area within the Khusf 1:50000 sheets which is located at 35 km west of Birjand at the south khora...

Many researches have been carried out in field of “Roof rock behavior in coal mines", most of them concentrated on mines devel opment networks; but a less attention have been paid to assessment and classification of roof strata behavior over long wall coal mining panels. In this paper, It has been a ttentioned to roof strata behavior over long wall coal mining panels in East Alborz coal mines. Intens ive field work and laboratory analyses that discuses the influence of various parameters on roof rock behavior of...

Coal mining is connected with many burdens, which affect mostly the safety of mining. One of the most serious problems is exhalation of methane to the mine air. This Paper describes methods used for degassing in Czech Republic’s underground coal mines. Authors deal with new options and new trends in mainta ining security by the means of degassing drill holes. There are two main methods Czech Republic used to prevent accumulation of the Methane gas in gaseous mines. The first method is sufficiently effective vent...

Self-ignition processes are a serious probl em in brown coal mining and depositing. Infusions and following fires are frequent events in open pit brown coal mines with seams influenced with previous underg round mining, homogenisation and other deposits, and on stock-piles of power and heat stations and industrial plants combusting coals as well. The objectives of the project from the ALFA programme No. TA01020351 are presented in this article. The project solves a research, development, and verification of a comp...

The open pit Veliki Krivelj is a copper mine which operates within RTB Bor Group in Serbia. In 1998 a combined haulage system involving the initial dump truck haulage, crusher, belt conveyor and a boom spreader for waste disposal was designed and installed in order to reduce the costs on overburden removal. The designed productivity of the system is 4 700 t/h and it will be fully operational in the next few weeks. Up to date it has been capable of achieving maximal 50% of this productivity because only one of two ...

This paper gives some information about risk management and its significance for financing project in mining industry. The projects in mini ng industry are very exacting for financial sources. By the obtaining of financial sources must be accepted kinds of financing. In the concrete mining company we were determining, which kind of financing is possible to use to finance mini ng projects with acceptance of risk. With the selection of the form of financing are conn ecting risks, that we are analyzing and we were pr...

The aim of this paper is to develop a methodology for predicting the potential of future drilling, not merely on average but more specifically as a function of the grades obtained in the drilling in Chadormalu Ir on ore deposit. In most cases additional samples are collected to reduce the overall unc ertainty on the estimation. To do this, the GET function method is used to find the bore hole locations that are more sensitive in reducing the local and global uncertainty than others. This function considers the Gra...

Investment in the mine scope is one of the most risk able fields. In the new management skills, risk management is a ve ry important feature. During of the execution of a mine project, the variation of each effective factor can affect on the execution, production and efficiency, therefore a mining project ma nager must be knowledge about of any effective parameter such as Annual productivity, annual benefit, annual cost and exploitation time, in project The net present value (NPV) is one of the most important meth...

Sorkhe-Dizaj iron oxide - apatite deposit is located within the Cenozoic Tarom volcano- plutonic belt in southeast of Zanjan, northwest Iran. The oldest units at the Sorkhe-Dizaj area are of Eocene age including trachyte, trachyandesite and andesitic tuffs intruded by quartz-monzonite, monzonite and granite plutons of Upper Eocene-Oligocene. The syn- to post-orogenic island arc magmatism and th e plutonic rocks show characteristics of I- type granites. Mineralization in the area is divided into th ree main zones (...

The paper deals with verification of the sl udge stabilization from retention tanks by using modified cellulose fibers. Verifica tion of the method was implemented through laboratory tests and field test. Laboratory te st take place in VUHU a.s. Most and field test was performed at the quarry Ji Е™Г­, Sokolov coal company, a.s. legal successor. Stabilization took place in order to allow extr action of sludge from retention reservoirs. These reservoirs are build for longer time period and must be cleaned due mainta...

Public Enterprise Elektroprivre da Srbije (EPS - Electric Power Industry of Serbia), the dominant electricity producer in Serbia, is a 100% state-owned public company. The Kolubara Mining Basin (MB Kolubara) with its open cast mines is one of 11 subsidiaries of EPS. In accordance with the Serbian Energy Strategy by 2015, one of the EPS priorities is a modernization and improvement of the efficien cy of EPS' coal mining operations at the Kolubara basin and significantly improvement the quality and uniformity of the...

This paper is focused on the sulphur and su lphur forms distribution in the Antonin coal seam at Jiri and Druzba open-cast mines in the North Bohemian brown coal basin, in the Czech Republic. Briefly describes the basic geological structure of the area, deals with sulphur forms, sulphur genesis, chemism, coal sampling and analysis from the exploration boreholes. Overall 32 coal samples were precisely analyzed. The results of this analysis were used for the construc tion of the graphic outputs. Based on these resul...

A comprehensive review of published books and articles shows that discontinuities, especially joints within coal-bearing depos its are important features that must be considered during mine planning and desi gn. Less attention has been paid to orientations of joint sets and other disc ontinuities relative to mining face in proposed rock mass classification systems. In fact the structural competence of mine roof rock is determined primarily by the discontinuities that weaken the rock fabric. In this paper the effec...

The objective of mine closure is to prev ent or minimize long-term environmental damage, and to create a self-sustaining natural ecosystem or other land use based on an agreed set of objectives. The Romanian mine closure legislation s hould be enforced in the coming years for taking best follow up actions and management of post mining closure. The mine closure is a process which should begi ns during the pre-feasibility phase of a project and continues through operations to lease relinquishment. The closure of min...

The Chah Zard Ag–Au epithermal deposit is located within an a ndesitic to rhyolitic volcanic complex in central part of Urumieh–Dokhtar Magmatic Arc (UDMA), west– central Iran. The deposit is formed in breccia bodies dominantly hosted by rhyolite porphyries. Geological field relationships s how that epithermal mineralization occurred in close association with a phreatomagmatic fracturing event, being localized in breccia cements, and formed as disseminated sulfides in the matrix of the more permeable breccia...

Costs are present in many daily decisions they take managers from lower hierarchical levels, but especially importa nt for strategic decision taken at top management level. The very adoption of certain strategies fo r the enterprise is based on analytical considerations which require methods of ec onomic and financial evaluation of projects, methods that can not be imagined outside costs. Allocation of resources to the enterprise are based on estimated costs, just as they and replacement of assets. Computation of ...