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The article considers the systematic errors of estimation of reserves and average contents of useful component in exploration of alluvial deposits of nesting, tape, etc. structures. The article identifies and evaluates the main components of systematic errors in the assessment of mineral content, useful and harmful components in alluvial deposits based on theoretical, experimental and generalized published works: insufficient density of the exploration network; error due to unrepresentative sample size. These erro...

Romanian Plain occupies from the geotecto nic point of view, the northern part of Moesian Platform, a platform forming a ri gid block between the Carpathians and the Balkans. Dacian Basin, opened after tecton ic movements, badenian , in the Sarmatian, outside the Carpathian arch, has evolved in a brackish sedimentation environment by the end of the Pliocene, after which was installed a lacustrine environment amid of water body restriction only in the southern pa rt of Romania. The lacustrine system is installed in...

Nowadays the importance of brown coal as a raw material is caused by growing needs of power in the Czech Republic. It namely concerns the only major domestic fossil raw material without which our country would become fully depended on the import of energy resources. Over 70\% brown coal reserves have been exploited in the North- Bohemian Basin today. Opencast mining of brown coal naturally led to vast landscape damages. Therefore reclamation work has acquired great significance. Brown coal is mined in four general...

In the course of years in the engineering practice are formed mathematical procedures which are marked as “engineering calculations”. We will characterize the engineering calculations with the following specific features: • the engineering calculations are pointedly pragmatic; • the engineering calculations are based on working formulas; • the results are approximate; • the engineering calculations are developed by experts and should be applied by experts.

The system is intended for operatively planning and management of the quality of extracted ore in real time. The system includes following features: Creating and maintenance of data base which contains the numeral samplers of the detonated fields, the needed technical and technological indicators etc. Planning of the extracted activities for period, day, shift and part of a shift by different optimization measures. Distribution of the extraction between the coal-faces. Reverse connection with GPS information relat...

The optimization of the coal winning process using different mechanical and alternative cutting techniques using appropried mathematical models is an up to date reserch methodology. In the paper, two kind of such models are presented, first using deterministic analytical relations evaluated by numerical calculus, and the second using Monte-Carlo simulation of the process using experimentally obtained test data to generate random values of intrinsic rock parameters and logic diagram for the functional connections b...

Twelve of the numerous methodological problems are represented. They appear in the development of the automated systems for control of the mine works at open mines; if these problems are not reported the work of the system can be compromised partially of totally. Shortly those problems could be formulated as follows: 1.The mine is not considered like a system; 2.A management of the model; 3.Hierarchy of proposes and limitations; 4.The depot – a solution or a problem; 5.Attention: literally performance; 6.In prob...

About two decades ago, in the land field of Orisovo village, situated on the west side of the town of Chirpan, by means of probes with depth over 280 to 380m, Eocenic Red Clays with big concentration of iron were found. Their thickness is more than 200 – 250m, and their padding, with depth over 600m is not reached. The base clay mineral is ilit. The process of sedimentation took place in considerably small but deep ancient lake by almost desert climate, in the middle of Eocene.

After exhausting of the vein ores of ore zone No 1, the detecting of metasomatic ore beds in the eastern part of Eniovche deposit has prolonged the ore`s life. The analysis of the geologicstructural situation places in the first place lytological and structural factories for localization of the metasomatic ore bodies. The lytological factor is predetermined by the presence of marbles and amphybolites. Its role is additionally increased by the scarn processes , creating much better conditions for metasomatic replac...