Application of (CAD) Modeling in Selection of Open Cast Mining Machines for Complex Structure Ore Deposits in Training of Mining Engineers

2017 ◽  
Vol 12 (7b) ◽  
pp. 1153-1158 ◽  
Author(s):  
Vladimir Ivanov ◽  
Viktoriya Merkulova
Keyword(s):  
Complex Structure ◽  
Ore Deposits ◽  
Cad Modeling ◽  
Open Cast Mining ◽  
Open Cast ◽  
Selection Of

scholarly journals Proper Selection of Blasting Charges Location in Quarries and Open Cast Mines

2006 ◽  
Vol 2 (1) ◽  
pp. 11
Author(s):  
Mostafa Ahmed Ismail
Keyword(s):  
Soft Rock ◽  
Soft Materials ◽  
Contact Layer ◽  
Physical Models ◽  
Correct Position ◽  
Soft Layer ◽  
Open Cast Mining ◽  
Strong Rock ◽  
Open Cast ◽  
Selection Of

The aim of the present study is to assess the effect of the-zone of weakness on blasting efficiency and to determine the correct position of the explosive charge in relation to the suggested soft layers intercalated inclusions of soft materials avoid the escaping of blasting product (heat, pressure) in the contact layer between soft rock and hard rock (ore). Physical models having dimensions (25x25x33cm) were made of cement and sand (1:3) to represent the strong rock deposits which are intercalated by inclusions or layer of soft material which represented by a mixture of cement and clay. The artificial rock models were tested with 5 gm, 10 gm, 15 gm, 20 gm, of gelatine dynamite with detonator No. 6.The charge of 10 gm was more suitable with respect to the distance of throw which is more important for open cast mining with respect to the dimension of working area on a bench. It has found that, the plane of weakness has less effect when the charge is concentrated on the position after the inclusion of soft layer which gave pressure on soft layer and close the possibility of escaping products.

scholarly journals Open-Pit Mine Dewatering Based on Water Recirculation—Case Study with Numerical Modelling

Energies ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4576
Author(s):  
Kazimierz Różkowski ◽  
Robert Zdechlik ◽  
Wojciech Chudzik
Keyword(s):  
Numerical Modelling ◽  
Drainage System ◽  
Open Pit ◽  
Open Cast Mining ◽  
Classic Approach ◽  
Water Recirculation ◽  
Hydrodynamic Field ◽  
Open Cast ◽  
Selection Of

The layout of the dewatering system in open-cast mining must be adapted to mining assumptions and to the size of expected inflows, which, in turn, depend on natural conditions and the operation of other mines and groundwater intakes, affecting the arrangement of the hydrodynamic field. This case study analyses possible dewatering solutions related to a change in the mining drainage system: decommissioning by flooding of a depleted deposit and dewatering of a new one located in the vicinity. As part of numerical modelling, a solution was sought to minimise the environmental impact of drainage. Forecast calculations for two drainage alternatives were made. One of the solutions follows the classic approach: independent dewatering of the new excavation. The second solution assumes the recirculation of waters from dewatering of the new mine through their discharge into a closed and flooded pit located in the vicinity. The results of the forecasts for both variants point to the modification of the hydrodynamic field resulting from expected volumes of inflows and different environmental effects. The use of numerical simulations assisted the selection of the optimal dewatering solution.

scholarly journals Technical and Financial Assessment of Hematite (Iron Ore) Extraction from Iron Deposits of Pokhari Area, Nawalparasi

2019 ◽  
Vol 5 ◽  
pp. 1-13
Author(s):  
Amit Kumar Das ◽  
Rajesh Kaji Kayastha
Keyword(s):  
Iron Ore ◽  
Financial Analysis ◽  
Research Work ◽  
Mineral Resources ◽  
Ore Deposits ◽  
Financial Assessment ◽  
Open Cast Mining ◽  
Iron Ore Deposits ◽  
Iron Deposits ◽  
Open Cast

Iron and Steels is one of the top three major imports of Nepal. Based on the fact that Nepal has large amount of mineral resources, it is important to explore and exploit them rationally. This research paper is carried out to estimate the iron ore reserve of the iron ore deposits of Pokhari in Nawalparasi which was recently discovered by Department of Mines and Geology (DMG), Nepal. In this research work, the technical and financial assessment of hematite (iron ore) extraction of iron deposits of Pokhari, taking an area of one square kilo meter, has been carried out. The tonnage of iron ore and the overburden (which is quartzite and slate in this case) were estimated considering the mining process to be open cast mining using vertical cross-section method. The depth of hematite zone is taken as 100 m. The iron ore to over-burden (waste) ratio was 1:3.36. The financial analysis was done on the basis of extraction of 3600 metric tons of iron ore per day and 8,64,000 metric tons annually. The return on investment (ROI) is 34%. Thus, the research work indicates that the extraction of large amount of iron ore of Pokhari area is economical and it is a beneficial project.

scholarly journals A Multiple and Multi-Level Substructure Method for the Dynamics of Complex Structures

2021 ◽  
Vol 11 (12) ◽  
pp. 5570
Author(s):  
Binbin Wang ◽  
Jingze Liu ◽  
Zhifu Cao ◽  
Dahai Zhang ◽  
Dong Jiang
Keyword(s):  
Structural Characteristics ◽  
Complex Structure ◽  
Complex Structures ◽  
System Matrix ◽  
Substructure Method ◽  
Residual Structure ◽  
The Matrix ◽  
Multi Level ◽  
Fixed Interface ◽  
Selection Of

Based on the fixed interface component mode synthesis, a multiple and multi-level substructure method for the modeling of complex structures is proposed in this paper. Firstly, the residual structure is selected according to the structural characteristics of the assembled complex structure. Secondly, according to the assembly relationship, the parts assembled with the residual structure are divided into a group of substructures, which are named the first-level substructure, the parts assembled with the first-level substructure are divided into a second-level substructure, and consequently the multi-level substructure model is established. Next, the substructures are dynamically condensed and assembled on the boundary of the residual structure. Finally, the substructure system matrix, which is replicated from the matrix of repeated physical geometry, is obtained by preserving the main modes and the constrained modes and the system matrix of the last level of the substructure is assembled to the upper level of the substructure, one level up, until it is assembled in the residual structure. In this paper, an assembly structure with three panels and a gear box is adopted to verify the method by simulation and a rotor is used to experimentally verify the method. The results show that the proposed multiple and multi-level substructure modeling method is not unique to the selection of residual structures, and different classification methods do not affect the calculation accuracy. The selection of 50% external nodes can further improve the analysis efficiency while ensuring the calculation accuracy.

scholarly journals Mining of rich iron ore deposits of complex structure under the conditions of rock pressure development

2020 ◽  
Vol 201 ◽  
pp. 01022
Author(s):  
Serhii Pysmennyi ◽  
Mykhailo Fedko ◽  
Nataliia Shvaher ◽  
Serhii Chukharev
Keyword(s):  
Rock Pressure ◽  
Complex Structure ◽  
Ore Deposits ◽  
Mining System ◽  
Mining Depth ◽  
Parabolic Shape ◽  
Pressure Development ◽  
Iron Ore Deposits ◽  
Horizontal Pressure ◽  
Compensation Chamber

The purpose of research is to increase the ore mass extraction ratio when mining rich iron ores by changing the shape of the stope chamber, as well as to substantiate its stable parameters under the conditions of the rock pressure manifestation. Used in mines existing methodologies for determining the structural elements of mining system are based on calculated equivalent spans of outcropping the stope chambers, which have a rectangular or tent shape. For the first time using the ANSYS software package, it has been determined that the formation of a compensation chamber of quasi-parabolic shape can significantly reduce the stresses concentration around the stope block. Thus, the formation of a stope chamber of a quasi-parabolic shape makes it possible to reduce vertical stresses as compared to horizontal ones without increasing horizontal pressure. When mining the extraction block, it is proposed to form the stope chamber of a quasi-parabolic shape with geometric parameters that directly depend on the parameters of the deposit, the depth of mining, and the direction of main stresses action. Dependences have been determined of the stresses value on the depth of mining and the physical properties of rocks, as well as on the length along the strike of the ore deposit. Thus, depending on the mining depth and length along the strike, rock pressure on the stope chamber of a quasi-parabolic shape decreases under non-uniform loading. The formation of a stope chamber of a quasi-parabolic shape will increase by 1.2 – 1.5 times the volume of pure ore that is recovered from the block.

scholarly journals Problems of Anthropogenic Influences upon the Landscape in North Bohemia

Geografie ◽  
1989 ◽  
Vol 94 (1) ◽  
pp. 19-30
Author(s):  
Galina Kruglová ◽  
Jan Vaněk
Keyword(s):  
Land Use ◽  
Coal Preparation ◽  
Anthropogenic Influences ◽  
Ecological Processes ◽  
Power Stations ◽  
The North ◽  
Open Cast Mining ◽  
Ecological Aspects ◽  
Ecological Problems ◽  
Open Cast

The paper treats of harmful influences of the industrial sprawl, of ecological processes and phenomena interfering with socio-economic functions of the North Bohemian landscape. Great attention has been paid to special ecological problems related to open-cast mining, brown-coal preparation, uranium-ore mining, development of power stations, chemistry, land other industrial branches. According to the degree of anthropogenic influences owing to complex multi-line land use and conforming with ecological aspects, three types of regions have defined in the North Bohemian region.

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