scholarly journals Using Topographic Advantages in Formulating a Strategy to Access Ore Bodies at Ban Phuc Nikel Mine

2020 ◽  
Vol 174 ◽  
pp. 01013
Author(s):  
Hung Nguyen Phi ◽  
Thang Pham Duc
Keyword(s):  
Underground Mining ◽  
Mineral Deposit ◽  
Access Method ◽  
Near Surface ◽  
Ground Support ◽  
Mining Technique ◽  
Ore Body ◽  
Ore Bodies ◽  
Gain Access ◽  
Transport Potential

There are various types of underground mining that are categorized based on the kind of shafts used, the technique of extraction and the process used to get to a deposit. Development mining is composed of excavation almost entirely in (non-valuable) waste rock in order to gain access to the orebody. To start the mining, the first step is to make the path to go down. Development, the work of opening a mineral deposit for exploitation is performed. With it begins the actual mining of the deposit. Access to the deposit must be gained either by stripping the overburden, which is the soil and/or rock covering the deposit,to expose the near- surface ore for mining or by excavating openings from the surface to access more deeply buried deposits to prepare for underground mining. The type of underground mining technique used is typically based on the geology of the area, especially the amount of ground support needed to make mining safe. When using to exploit ore body by underground mining method, the textbook guide in universities of Vietnam had had 4 main strategies include: access by horizontal tunnel lines, access by incline shaft, vertical shaft and combination of above access method. In this study, we developed a solution outside of four above approaches, to take advantage of the topography, transport potential energy, and advantages when constructing sloped incline, backward from outside to inside.

scholarly journals Selective underground mining of complex structured ore bodies of Kryvyi Rih Iron Ore Basin

2018 ◽  
Vol 60 ◽  
pp. 00041 ◽  
Author(s):  
Vsevolod Kalinichenko ◽  
Serhii Pysmennyi ◽  
Nataliia Shvaher ◽  
Olena Kalinichenko
Keyword(s):  
Iron Content ◽  
Iron Ore ◽  
Underground Mining ◽  
Ore Deposits ◽  
Thickness Ratio ◽  
Operating Costs ◽  
Ore Body ◽  
Ore Bodies ◽  
Selective Mining ◽  
To Receive

Selective mining of complex structured ore bodies will enable increased iron content in the mined ore mass in underground mining at Kryvyi Rih iron ore basin applying the existing mining systems. The article determines the way the grade changes in a mine block of a complex structured ore body when applying bulk and selective mining as well as factors influencing indices of extracting ore mass from the block. The investigation results prove that it is reasonable to mine complex structured ore deposits with barren inclusions applying selective mining if the iron content in the block varies from 64 to 67% and horizontal thickness of the barren inclusion makes 4 – 12 m. At that, the thickness ratio should not exceed 0.3. Stoping methods should be applied to receive high indices of ore mass extraction. There is determined an ore/barren inclusion-to-ore body thickness ratio considering the dilution factor that confirms practicability of selective mining of complex structured ore bodies. Selective mining of complex structured ore deposits of Kryvyi Rih iron ore basin applying open stoping enables increasing the mined ore mass quality without considerable capital and operating costs and, consequently, staying on the market and enhancing the environmental situation in the region.

scholarly journals Vertical mineralization interval and forecast of the position of an ore-body in the Alsar Sb-As-Tl deposit, FYR Macedonia

2011 ◽  
pp. 119-129 ◽  
Author(s):  
Rade Jelenkovic ◽  
Blazo Boev
Keyword(s):  
Control Method ◽  
Ground Surface ◽  
Mineral Deposit ◽  
Depth Interval ◽  
Velocity Control ◽  
Ore Body ◽  
Ore Bodies ◽  
Central Deposit ◽  
Recent Position ◽  
Geomorphological Analysis

Establishing a vertical interval of mineralization is a complex geological task based on the knowledge of many parameters and quantities that describe the genesis of an ore deposit. It is particularly important to know the time and the primary depth of the formation of an ore-body and its recent position. The establishment of the vertical mineralization interval is considered in this work on the example of the Alsar Sb-As-Tl mineral deposit. The research methods used were geomorphological analysis (the principal exploration method), measurement of cosmogenic radioactive (10Be, 26Al) and stable (3He, 21Ne) nuclides to determine the erosion velocity (control method) and comparison of the obtained results with the geological exploration data from operative mine workings. A detailed geological study of the formation of the Alsar deposit preceded the research. The research data are the following: depth interval of the ore-body is 10-50 m below the present ground surface; average level of erosion in the Alsar deposit area is 20-80 m over a period of 106 years (Ma), or about 100-400 m from the beginning of the volcanic activity to the present day (?5 Ma); thickness of the eroded rock complex over the ore bodies from the beginning of the hydrothermal alteration and the formation of ore bodies (4.31 Ma) to the present is ?150 m (Crven dol), or ?230 m (central deposit); the palaeointerval of the formation of the ore-body is 230 m (200-430 m); and, finally, the potentially mineralized interval is deep, from 10 m to 280 m below the surface.

scholarly journals Modified ground support with alternative fill material for ground control at munsar underground manganese mine of moil limited, India

2019 ◽  
Vol 2 (1) ◽  
pp. 69-77
Author(s):  
Ganesh Manekar ◽  
Dipankar Shome ◽  
Mukund Chaudhari
Keyword(s):  
Rock Mechanics ◽  
Underground Mining ◽  
Central India ◽  
Underground Mines ◽  
Manganese Ore ◽  
Opencast Mining ◽  
Mining Equipment ◽  
Ground Support ◽  
Ore Body ◽  
Fill Material

Abstract MOIL Limited is operating 7 underground and 3 opencast mines in central India and producing annually more than 1.3 million tonnes of various grades of manganese ore. The underground mines are operating at shallow – 90 m at Munsar mine to moderate – 353 m at Balaghat mine below the surface with horizontal cut and fill (HCF) or its variant method of stoping with post filling by hydraulic sand stowing. The Munsar mine is being worked underground since 1903. The opencast mining is presently stopped. The ore body below the opencast quarry is geological continuity of the area excavated in past by opencast method of mining. The underground mining is done through the adit in three levels i.e. 270’L, 220’L, 170’L and by incline in western part of the property at 70’L. The horizontal drift development has been developed in the manganese ore body with sill drive of 5 m above the sill pillar in lower level at 70’L and barrier pillar of 5 m thickness is left for protection of upper level at 170’L. Valuable mineral has been locked in sill pillar and therefore rock mechanics investigations have been carried out. On the basis of study now the drift development has been carried out in footwall rock at 70’L, (-) 30’L and below levels and it has improved the minable manganese ore by about 20%. In this modified HCF stope design, an alternative fill material in place of sand, which has been developed in house by use of overburden (OB) material after treatment, has been used for hydraulic stowing. The experimental trials find out that the alternative fill material of OB is more compact and forms a non-expansion floor for the men and machines in the stope. This will certainly help in the introduction of mobile underground mining equipment for drilling in the stopes and mechanical mucking, transportation and loading of the ROM. The paper presents rock mechanics investigations and future use of alternative fill material of overburden material after heat treatment for better safety and productivity at Munsar Mine of MOIL.

scholarly journals MATCHING MACHINE DESIGN TO THE PRODUCTION PROCESS: A CASE STUDY IN THE INTEGRATED DESIGN OF MOBILE EQUIPMENT AND MINING METHODS

2011 ◽  
Author(s):  
Patrick F. R. Murphy ◽  
Laeeque K. Daneshmend
Keyword(s):  
Underground Mining ◽  
Integrated Design ◽  
Platinum Group Metal ◽  
Worker Safety ◽  
New Production ◽  
Materials Handling ◽  
Ground Support ◽  
Ore Bodies ◽  
Added Benefit ◽  
Mining Methods

Underground mining imposes very rigid constraints on mobile equipment design. The choice of a particular mining “method” – i.e. the specific mix of techniques for excavation, ground support, and materials handling – is greatly influenced by the nature of the ore body being exploited. Mining methods tend to be fairly conservative, relying upon well established and proven equipment designs. In order to improve worker safety and productivity, South African platinum mines have increasingly turned to mechanization. An added benefit of these mechanization efforts is that the nature of the mining can be modified based on the feasible equipment designs. These efforts have resulted in changes to the mining methods employed in South Africa’s narrow-reef platinum group metal (PGM) ore bodies, as well as the development of a suite of mobile equipment which enables implementation of the new production processes. This paper focuses on the design and development of one of these machines - a narrow-reef bulldozer suited to selective mining. The resulting machine is a miniature unmanned bulldozer and multipurpose crawler platform designed for narrow-vein mining applications, with integrated mechatronics and remote control capabilities. This paper will discuss the development of the machine and the applications for which it was designed.

scholarly journals Simulation of deposit parameters in underground development mining

2018 ◽  
Vol 60 ◽  
pp. 00029 ◽  
Author(s):  
Vladimir Golik ◽  
Yuriy Razorenov ◽  
Volodymyr Morkun ◽  
Nataliia Morkun
Keyword(s):  
System Analysis ◽  
Physical Simulation ◽  
Underground Mining ◽  
Theory And Practice ◽  
Ore Body ◽  
Advanced Experience ◽  
Modern Development ◽  
Complex Criterion ◽  
Economic Indices ◽  
Equipment Application

The article is aimed at improving development mining to prepare an ore body for stoping by access ramps to provide comfortable conditions and high technical and economic indices in underground mining. Efficient parameters of underground mining are chosen in the course of simulating data on the mining theory and practice considering ore losses and dilution on the basis of critical analysis of uranium mining enterprises’ activities. The research provides data on geological and engineering zoning of an ore deposit and physical-mechanical properties of ore bearing rocks. The advanced experience is systemized and there is provided system analysis of modern development mining schemes with access ramps (ring, spiral, one-way inclined, central inclined and across the strike). The research recommends schemes of development mining and substantiates their advantages. There are quantitative indices of physical simulation of development variants as to drawn ore quality according to criteria of soil location in ore draw points. The scientific novelty implies developing the criterion of optimality and ranking variants of development mining according to technical-economic and geomechanical indices considering some technological factors as well as the number of stopes operating simultaneously on the level. The study consists in increasing authenticity of development projects through applying complex schemes of access ramps according to the complex criterion of increasing mining depths, equipment application, ventilation and underground mine capacity.

scholarly journals Decreasing Mining Losses for the Room and Pillar Method by Replacing the Inter-Room Pillars by the Construction of Wooden Cribs Filled with Waste Rocks

Energies ◽  
2020 ◽  
Vol 13 (14) ◽  
pp. 3564 ◽  
Author(s):  
Krzysztof Skrzypkowski
Keyword(s):  
Underground Mining ◽  
Second Stage ◽  
Ore Body ◽  
Strength Tests ◽  
Waste Rocks ◽  
Rock Pillars ◽  
First Time ◽  
Numerical Program ◽  
Vertical Deformations ◽  
Maximal Capacity

The article presents methods of securing mining excavations using wooden cribs. For the underground room and pillar method used to excavate zinc and lead ore body in the Olkusz-Pomorzany mine in Poland, model tests for the replacement of rock pillars by wooden cribs are presented. In the first stage of research, the results of laboratory strength tests carried out on models of four-point, six-point and eight-point cribs made of wooden beech beams at a 1:28 scale arranged horizontally were determined. For the first time, a concave round notch connection was used to connect the beams of the wooden cribs. The maximal capacity of cribs consisting only of beams and filled with waste rocks taken from underground mining excavations was determined. In addition, the vertical deformations of the cribs at maximal loading force and their specific deformations are presented. Additionally, on the basis of load-displacement characteristics, the range in variability of the stiffness of empty cribs and those filled with waste rocks was calculated as a function of their compressibility. In the second stage of research, the room and pillar method was designed in the Phase2 numerical program. The aim of the study was to determine the stresses in the inter-room pillars. Based on the results of laboratory and numerical tests, a factor of safety was determined, indicating that it is possible to reduce mining losses while maintaining the safe exploitation conditions of the ore body.

Geodynamic Hazard Assessment for Tectonic Structures in Underground Mining of North Ore Bodies in the Oktyabrsky Deposit

2019 ◽  
Vol 55 (1) ◽  
pp. 77-87
Author(s):  
V. A. Uskov ◽  
A. A. Eremenko ◽  
T. P. Darbinyan ◽  
V. P. Marysyuk
Keyword(s):  
Hazard Assessment ◽  
Underground Mining ◽  
Tectonic Structures ◽  
Ore Bodies

Research of Mining Method for Difficult-to-Mine Ore Bodies in Deep Mine

2014 ◽  
Vol 962-965 ◽  
pp. 1041-1046
Author(s):  
Qi Fa Ge ◽  
Xue Sen Sun ◽  
Wei Gen Zhu ◽  
Qing Gang Chen
Keyword(s):  
In Situ Stress ◽  
Mining Method ◽  
Deep Mining ◽  
Deep Mine ◽  
Ore Body ◽  
High In Situ Stress ◽  
Ore Bodies ◽  
Large Panel ◽  
Back Filling

There are many problems such as depth, high in-situ stress, high ground temperature and rockburst proneness etc. in deep mining. And it is an acknowledged and urgent mining technical puzzle about mining method of gently inclined and medium-thick ore bodies. For such an ore body in West wing of Dongguashan copper mine, if we use traditional mining method, it is hard to conquer such difficulties as high in-situ stress, large open area in roof, removal of mined ore by gravity etc. The theory of “large panel and lower sublevel height” will be easy to solve such problems. This paper use numerical technology to analyze and compare the technical and economical effectiveness for different selected mining method and its structure. The sublevel (at a height of 12 m) open stoping with back-filling by extraction in two steps is quite suitable for ensuring safety, increasing efficiency, productivity and reclaiming resource. The selected method is feasible and well worth spread.

The influence of currents induced in the host rock on electromagnetic response of a spheroid directly beneath a loop

Geophysics ◽  
1981 ◽  
Vol 46 (8) ◽  
pp. 1121-1136 ◽  
Author(s):  
Alexander A. Kaufman
Keyword(s):  
Frequency Domain ◽  
Time Domain ◽  
Asymptotic Expression ◽  
Surrounding Medium ◽  
Electromagnetic Response ◽  
Ore Body ◽  
Ore Bodies ◽  
Integral Equation Approach ◽  
Em Field ◽  
Special Case

A variety of time‐domain and frequency‐domain electromagnetic (EM) methods has come into use in minerals exploration for detection of conductive ore bodies. Because the responses of these various systems differ markedly from one another, the question arises as to which is the most effective for use in discovering a buried, conductive ore body. The question can be posed as follows: What type of exploration system provides the best signal‐to‐noise (S/N) ratio, when signal is defined as the anomalous EM field caused by the presence of a target body and noise is defined as EM responses from the surrounding medium? Analytic solution of the problem is tedious and has not yet been reported in the literature. I describe some results for a special case which reduces the complexity of the problem somewhat. The case treated is that of a conducting spheroid situated directly beneath a source loop. The EM responses caused by currents in the spheroid and in the surrounding medium were computed in both the frequency domain and time domain, using the integral equation approach, supplemented with evaluations of asymptotic expression for various field components. Results show that the transient method provides the best S/N ratio of the methods considered.

Research and Application of the 3D Mathematic Model of Ore-Body Based on Suppac Software - Yunnan White Cattle Factory Silver Polymetallic Mine

2013 ◽  
Vol 868 ◽  
pp. 84-87
Author(s):  
Ying Ling Li ◽  
Jian Guo Gao
Keyword(s):  
Body Position ◽  
Three Dimensional ◽  
Estimation Method ◽  
Mineral Resources ◽  
Mathematic Model ◽  
Mineral Deposit ◽  
Three Dimensional Model ◽  
Ore Body ◽  
White Cattle ◽  
Three Dimensional Models

Three-dimensional models of deposit are the foundation of realizing digital mineral deposit , with the aid of mining software Surpac,it can establish deposit database, the three dimensional model of the mining surface,,orebody and roadway of the yunnan white cow factory silver polymetallic deposit.The 3D model can show the vivid image of the mining topography and geomorphology, ore body position, gallery situation. The ore model of orebody grade founding by kriging can show the distribution change of orebody grade clearly, and finally estimate the amount of ore body. Comparing with the traditional estimation method of exploration report, we can find the estimation of mineral resources by software is accurate.

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