factors to consider in determining smallest mining units
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- factors to consider in determining smallest mining units
The most common approach used in the mining industry for mineral resources modeling is to estimate the grades using ordinary kriging and report the recoverable resources based on this deterministic estimated model. Mineral resources calculated with kriging are a smooth representation of the actual distribution of grades …
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The SMU size depends on a number of different factors, including the mining equipment size, the mining method to be used, the direction of mining, and the depositional …
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The SMU is generally defined on a block model basis and is commonly associated as the selective mining unit (SMU), the smallest volume of material on which …
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These are named shafts A-D for purposes of anonymity. The block lists obtained for these mines contain gold grades in centimetre-grams per ton (cm.g/t), channel width, expected stoping width, and area of the mining …
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where Mining Recovery and Mining Dilution modifying factors are supported by reasonable assumptions. For a Feasibility Study appropriately detailed assessments of Modifying Factors are required and need to be documented. As a guide the Mining Factors are listed in JORC Table 1. Section 4. Considerations material to the Mining Recovery and Mining
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There are many factors that contribute to the remnant uncertainty at the time of mining, including small scale geological variability, mining practice, incomplete …
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The size of a resource, the competence of the rock and the product price, all have a significant impact on the design and value of a mining project. This can be demonstrated by way of example - by ...
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Good understanding of the mining technologies by the mine geologists facilitates their communication with the mining engineers. Reserves are usually …
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The LMU stipulations shall provide for: ( 1) The submittal, within 3 years from the effective date of LMU approval, of a resource recovery and protection plan that contains the information required by § 3482.1 (c) of this title for all Federal and non-Federal lands within the LMU. ( 2) A schedule for the achievement of diligent development and ...
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The selective mining unit is a concept, rather than physical entity, representing the smallest unit you are able to successfully mark out and the mine as a single defined unit. Unfortunately ...
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To determine if a mining block is classified as ore or waste, the estimated value is used for this classification. The most common cut-off grade optimisation techniques consider the break-even grade and then adapt this to volume ('hill of value' ( Hall, 2014 )), stage of the mine's life ( Lane, 1988 ) or net present value (NPV) like the ...
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Definition of Longwall Mining • A high extraction method of mining along the face of a predefined block of coal, referred to as a panel, while allowing the immediate roof to collapse upon advancement • Panel Configuration – Panels generally range in size from 500 to 1,000 feet in width and lengths exceeding two miles
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2.1. Short-term production scheduling concepts. The period time-step in SSTMPS can be months, weeks, days, or shifts. The concept of space is partitioned into …
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Set up server racks correctly. Proper server rack setup depends on your data center's size. To avoid server rack issues, consider the size of your racks as well as the size of your space. Most racks can accommodate servers up to 19 inches wide, but you must also account for the height and depth of server racks when planning your use of …
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The break-even analysis is important to business owners and managers in determining how many units (or revenues) are needed to cover fixed and variable expenses of the business. Therefore, the concept of break-even point is as follows: Profit when Revenue > Total Variable Cost + Total Fixed Cost. Break-even point when Revenue = Total Variable ...
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A company's key consideration when selecting discount rates for a project is the rate of return that is likely to attract a major investor. Often the actual discount rate used by the company does not address the risks of the individual project. To begin, different discount rates should be applied to different commodities.
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Dispersion in Statistics Explained. Dispersion (scatter or variation) can have multiple meanings based on the context it is used in. For instance, in statistics, it is the factor that helps determine the extent of variation of values in a particular data set.. At the same time, it allows investors to estimate the statistical distribution of potential portfolio returns …
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The main factors influencing the selection include the occurrence condition of ore bodies, technical condition of mining, the value of the ore, working …
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Any other factors that affect the outcome (highly dependent on the situation). In our example, such factors contributing to the uncertainty could be the following: the smallest division on the ruler is 0.1 in., the person using the ruler has bad eyesight, or one side of the paper is slightly longer than the other.
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The two key parameters determining the sensitivity of this method are the smallest bubble detectable by the operator and the waiting time for bubble generation. This time must be compatible with the production rate and with operator attention. It is reasonable to consider that the smallest bubble an operator could detect has 1
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The conventional definition of the selective mining unit (SMU) is the smallest volume of material on which ore/waste classification is determined. The SMU …
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The quantity of ore mined and waste rock (i.e., overburden or barren rock) removed to produce a refined unit of a mineral commodity, its rock-to-metal ratio (RMR), is an important metric for understanding mine wastes and environmental burdens. In this analysis, we provide a comprehensive examination of RMRs for 25 commodities for …
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With elevated tanks, the cost per unit volume decreases significantly as the tank capacity is increased. A 100,000-gal (380,000-L) elevated tank has approximately twice the cost per unit volume of a 500,000-gal (1.9-ML) elevated tank (Figure 5-4). For reservoirs and standpipes, an increase in capacity also lowers the cost per unit
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Selective mining unit (SMU) determination is a complex engineering decision and may have an economic impact on the mining operation and will significantly affect the mine planning process. The SMU is generally defined on a block model basis and is commonly associated as the selective mining unit (SMU), the smallest volume of
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Slices are placed within a regular optimisation framework (depicting a sublevel of stopes) and represent the smallest mining unit (the smallest volume that can be selectively mined). The optimisation algorithm will then progress through the resource model in a direction perpendicular to the optimisation framework whilst evaluation slices ...
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Equipment selection. The equipment selection process for an underground mine design plan has an extremely wide scope as there are a myriad of parameters to consider when incorporating mobile and stationary equipment in hard or soft rock mining applications. This article primarily focuses on the initial selection of mobile equipment in hard rock ...
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First Online: 22 February 2019. 784 Accesses. Abstract. The geological block model is used as the basis for the grade-tonnage curves and subsequent financial models. On some …
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The Sanshandao Gold Mine is located on a seabed, and the crown pillar is the main barrier to isolating seawater and preventing it from entering the mine. The thickness of the crown pillar and the size of the point pillars have a substantial impact on the reduction of resource waste and the economic development of the mine. Therefore, it is …
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The determination of reserves from the available coal resources shows what coal is currently available to be economically extracted, based on market conditions and projected mining costs. Determining available coal resources and reserves are important factors to be considered in the development of a national energy policy and for providing ...
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Typical grade-tonnage curve with a cut-off grade of 5g/t. The resultant tonnes above 5g/t are 10.2 million tonnes and the average mining grade is 8.1g/t.
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How is the safety factor calculated. The definition of the safety factor is simple. It is defined as the ratio between the strength of the material and the maximum stress in the part. When the stress in a specific position becomes superior to the strength of the material, the safety factor ratio becomes inferior to 1, this when there is danger.
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Efficiency of a speed reducer is an important selection factor that is often overlooked. It shouldnít be. In many cases, high-efficiency gearing cuts the cost of drives and their...
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Full size image. The concept of the OMU method is to add operational factors for determining block size (s) through the calculation of planned dilution from mining and grade control process. Global and local approaches can be applied in different ways or purposes in the mining sequencing.
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