Substantiation of underground geotechnology at the combined mining of ore deposits on the basis of accounting the features of transients

2020 ◽  
pp. 326-337
Author(s):  
I. V. Sokolov ◽  
Y. G. Antipin ◽  
A. A. Smirnov ◽  
I. V. Nikitin
Keyword(s):  
Transition Zone ◽  
Net Present Value ◽  
Transition Period ◽  
Underground Mining ◽  
Methodological Approach ◽  
Stable State ◽  
Ore Deposits ◽  
Open Pit ◽  
Chamber System ◽  
Specific Factors

Within the new methodological approach, a scientific and technical substantiation of the optimal underground geotechnology with the combined development of ore deposits based on the characteristics of transients was completed. Based on the analysis of experience of the combined development of ore deposits, the transition process features were revealed: a sharp decrease in the production capacity of the enterprise and an increase in capital investments, and its main goal was determined - to create the most favorable conditions for the transformation of the mining enterprise from one stable state to another. The types of transition areas are systematized depending on the scheme of conducting open and underground mining during the transition period. Four rational options for underground geotechnology that take into account specific factors and conditions formed during open mining, providing optimal parameters for the development of underground mining at a new stable stage, are developed. The method of economic and mathematical modeling for the conditions of the of the Safyanovsky copper deposits investigated the influence of specific factors on the gross profit - the depth of the open pit, which varies in the range from 140 to 380 m, and the depth of the reserves under open pit, which varies in the range from 80 to 320 m. The best option for underground geotechnology, which provides for the phased opening of underquarry reserves by a autoincline from the open pit and an runaway from the surface, mining the transition zone by level-chamber system with filling under ore insulating pillar formed within the transition zone, and the further development of the main reserves by level-chamber system with filling under filling mass, is established by the criterion of net present value.

scholarly journals ANALISIS PENENTUAN KADAR BATAS OPTIMAL (OPTIMUM CUT-OFF GRADE) DENGAN METODE LANE: STUDI KASUS PENAMBANGAN EMAS BAWAH TANAH

2020 ◽  
Vol 1 (1) ◽  
pp. 1-8
Author(s):  
Sari Uly Uly Sibarani ◽  
Fadhila A Rosyid ◽  
Aryo P Wibowo ◽  
Lilik E Widodo ◽  
M Nur Heriawan
Keyword(s):  
Net Present Value ◽  
Underground Mining ◽  
Commodity Prices ◽  
Open Pit ◽  
Present Value ◽  
Open Pit Mines ◽  
Vein Type ◽  
Result Show ◽  
Cut And Fill ◽  
Mineral Reserves

ABSTRAKKonservasi mineral akan tercapai manakala semakin banyak cadangan mineral tertambang dan meninggalkan sesedikit mungkin material waste. Untuk mencapai hal tersebut salah satu cara yang dapat ditempuh adalah menentukan jumlah cadangan berdasarkan kadar batas yang optimal (optimum cut-off grade). Dalam penentuan optimum cut-off grade, model matematis yang dapat dipergunakan adalah model/persamaan Lane. Metode Lane akan memaksimalkan nilai Net Present Value (NPV) dengan mempertimbangkan 3 variabel, yaitu; variabel ekonomi (harga komoditas dan biaya), distribusi kadar pada endapan, dan kapasitas maksimum pada tahapan penambangan (mining, milling, and refinery). Model Lane biasa diterapkan dalam tambang terbuka, namun dalam penambangan bawah tanah sulit untuk diterapkan. Dalam peper ini akan dikaji penerapan Model Lane dalam penentuan optimum cut-off grade pada penambangan urat (vein) emas bawah tanah dengan metode cut-and-fill. Hasil simulasi menunjukkan nilai optimum cut-off grade yang dinamis dalam memaksimalkan NPV dan nilainya lebih besar dari break even cut-off grade.Kata Kunci: model Lane, optimum cut-off grade, tambang bawah tanah ABSTRACTMineral conservation will be obtained if more mineral reserves are extracted and leaves less waste as possible. One of the methods to achieve those condition is determining the total minable reserves based on the optimum cut-off grade. Optimum cut-off grade can be estimated using Lane Model. Lane Model will maximize the Net Present Value (NPV) by considering 3 variables, i.e; economic variables (commodity prices and costs), grade distribution of deposit, and maximum capacity of each stage of production (mining, milling, and refinery). Lane models are usually applied in open-pit mines, unfortunately it is difficult to apply for underground mining unless some there are some modifications. This paper will examine the application of the Lane Model in determining the optimum cut-off grade in underground gold mine using cut-and-fill method to extract vein type deposit. Simulation result show dynamic optimum cut-off grade which maximizing NPV and generally greater than the break-even cut-off grade.Key Words: Lane model, optimum cut-off grade, underground mine 

scholarly journals Combined Method of Coal Mining in the Opening of Shallow Layers as a Direction of Innovative Development of Geotechnology

2021 ◽  
Vol 315 ◽  
pp. 01006
Author(s):  
Tatiana Tyuleneva ◽  
Roman Shishkov ◽  
Elena Kucherova ◽  
Marat Moldazhanov
Keyword(s):  
Coal Mining ◽  
Underground Mining ◽  
Methodological Approach ◽  
Production Capacity ◽  
Open Pit ◽  
Open Pit Mining ◽  
Mining Operations ◽  
Balanced Development ◽  
Coal Reserves ◽  
The Cost

In recent years, there has been a decline in the efficiency of coal mining by traditional methods. On the one hand, the volume of coal outside the contour of the cut, which is economically impractical for open-pit mining, is increasing. On the other hand, when using underground geotechnology, the cost of production exceeds the cost of performing mining operations using open geotechnology, this is due to differences in the factors of operation of the open pit and the mine. This circumstance determines the use of open-underground technology for mining coal reserves outside the contour of the open pit as an actual and promising direction. This article describes a methodological approach based on the use of technological schemes for the preparation and treatment of reserves of powerful shallow coal seams, the justification of the parameters of combined geotechnology with a coordinated and balanced development of open and open-underground mining operations with the distribution of reserves for open and open-underground mining of coal reserves beyond the limit contour of the open pit, the preparation of excavation sites directly from its workings and the coordination of production capacity and the speed of their development. Its application will increase the production capacity of the coal mining complex without additional environmental burden and will provide an increased return on investment.

Scientific and Practical Procedures of Ensuring the Effectiveness of Environmental Measures during Exploitation of Iron Ore Deposits

2017 ◽  
Vol 22 ◽  
pp. 160-165
Author(s):  
Liubov Tymoshenko
Keyword(s):  
Economic Efficiency ◽  
Iron Ore ◽  
Underground Mining ◽  
Raw Materials ◽  
Environmental Safety ◽  
Ore Deposits ◽  
Open Pit ◽  
Iron Ore Deposits ◽  
Environmental Measures ◽  
Environmental Activities

The essence and expediency in the use of partial indicators of economic efficiency evaluation and selection of environmental activities in the development of iron ore deposits in different mining conditions of its exploitation is identified. Methodical approach to economic evaluation of the effectiveness of environmental measures during developing of iron ore deposits by using of index environmental and economic changes level of the environment, specific costs for environmental protection and economic intensity of violations of the environment was improved. The generalized indicator of economic efficiency of production ecologization at enterprises of mining and processing of ore raw materials is grounded. Levels of this indicator by the character of environmental activities of the enterprise, the stability of its interaction with nature and level on environmental-safety, are allocated. The methodical substantiation of evaluation criteria and methods for measuring the cost-effectiveness of environmental measures during exploitation of iron ore deposits and practical aspects of assessing the level of ecologization of open-pit and underground mining in relation to the economy of mining enterprises are given.

scholarly journals Project optimization

2015 ◽  
Vol 68 (1) ◽  
pp. 97-102 ◽  
Author(s):  
Carla De Carli ◽  
Peroni Rodrigo de Lemos
Keyword(s):  
Net Present Value ◽  
Underground Mining ◽  
Mineral Resources ◽  
Mineral Deposit ◽  
Economic Feasibility ◽  
Open Pit ◽  
Optimum Depth ◽  
Combination Of Methods ◽  
Definition Of ◽  
Project Optimization

A mineral deposit can be exploited by underground methods or by open pit methods, defined according to their characteristics, especially in relation to depth and geometry of the ore body and the economic feasibility of the methods. However, there are cases in which the alternative that represents the best return for the project is the application of combined methods, i.e., the open pit followed by underground mining. In these situations, the major difficulty is the definition of the transition point of methods, seeking to maximize the net present value of the project and the use of mineral resources. The premature suspension of activities in the open pit, as well as advancing beyond the optimum depth, can derail the implementation of the combination of methods, so it is important to analyze the project not only individually but also in an integrated way.

Forecast of the stability of the array of gold ore deposits based on the analysis of core material from exploration core drilling wells

2020 ◽  
pp. 216-223
Author(s):  
E. L. Sosnovskaya ◽  
A. N. Avdeev
Keyword(s):  
Underground Mining ◽  
Methodological Approach ◽  
Far East ◽  
Gold Deposits ◽  
Ore Deposits ◽  
Core Material ◽  
Limited Information ◽  
Core Drilling ◽  
Gold Ore ◽  
Gold Ore Deposit

During underground mining of gold deposits it is necessary to promptly assess the degree of stability and potential impact hazard of rocks. A common and reliable source of information on the structure of the deposit is photodocumented core material from exploration core drilling wells. In the course of research of geotechnical processes at gold ore deposits, the authors developed a method of analysis of the degree of core material destruction in order to identify high-tension areas of rock masses. The method is based on a synergetic scientific and methodological approach. The fractal structure of tectonic fractal fracturing obtained as a result of core material analysis is considered as a consequence of a self-organizing process, the nature of which is associated with the dynamics of tectonic movements of the deposit region. The areas of anomalously fractured core detected as a result of the analysis are used as a marker of zones of increased tension and instability of the rock mass. The proposed methodology has been tested in a number of fields in Siberia and the Far East. As an example of the use of the technique, the analysis of the field of destructive elements of the Karalveem field is considered illustratively. The method allows to make an assessment of the geomechanical situation in conditions of limited information about the tectonic structure of the gold ore deposit.

Mining Plan Optimization Based on Linear Programming in Shirengou Iron Mine

2012 ◽  
Vol 429 ◽  
pp. 206-209
Author(s):  
Ming Zhu ◽  
Jin Long Sun ◽  
Wen Sheng Liu ◽  
Ai Xia Zhang ◽  
Hui Zhi Zhou ◽  
...  
Keyword(s):  
Mathematical Model ◽  
Linear Programming ◽  
Transition Period ◽  
Underground Mining ◽  
Economic Effect ◽  
Mining Operation ◽  
Open Pit ◽  
Difficult Situation ◽  
Iron Mine ◽  
Project Optimization

Faced with the difficult situation of the joint operation of open pit and underground mining in transition period in Shirengou Iron Mine, a suitable linear programming mathematical model of mining plan was established and synthesis optimization results were obtained, which would increase the overall economic effect of the mining operation during the transition period, while the limited reserves and ore quality control were entirely considered. A pronounced economic benefit was achieved by the project optimization. This mathematical model can be widely used in mining process to control the quality and quantity equilibrium of ore output, comprehensive utilize some waste rock and optimize the mining plan.

Experience in the development of innovative underground geotechnologies for mining of ore deposits

2020 ◽  
pp. 338-350
Author(s):  
I. V. Sokolov ◽  
Y. G. Antipin ◽  
N. V. Gobov ◽  
I. V. Nikitin
Keyword(s):  
Systematic Approach ◽  
Underground Mining ◽  
Mineral Resources ◽  
Environmental Safety ◽  
Ore Deposits ◽  
Operating Costs ◽  
Processing Waste ◽  
Ore Preparation ◽  
Additional Value

Based on an analysis of the design principles and practice of underground mining of ore deposits, the most significant features, trends to develop and directions to enhance of underground geotechnology in the field of opening and preparation, mining systems, filling works and ore preparation have been established. The main signs of innovation - scientific research and implementation in production in order to obtain additional value, are highlighted. Various approaches to the development of innovative underground geotechnologies are shown and a methodology for their justification is formulated based on a systematic approach implemented in the framework of the concept of integrated development of mineral resources and on the principles of economic efficiency, industrial and environmental safety, completeness of subsoil development. The experience of the IM UB RAS on the development and implementation of innovative underground geotechnologies in the design and industrial operation of a number of ore deposits is given, which significantly increased the completeness and quality of ore extraction from the subsoil, increased labor productivity in sinking and stoping works, reduced capital and operating costs for ore mining and to utilize mining and processing waste in the mined-out space.

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