• What is grade control and how can it save you time?

    Aug 14, 2015· Today will take a closer look at grade control and how it can improve the mining industry. What is Grade Control? Grade control is an essential part of the mining process because the metal being extracted from the ground is never constant.he first grade control machines to have guidance systems were introduced in the late 1990s.

  • What Does the Grade of a Gold Mine Refer To?

    Feb 07, 2020· When gold ore has a high grade, it takes relatively less effort to extract an ounce of gold from the ground and, since less ore has to be dug out, it reduces the input costs for the gold mining

  • what is grade control (mining)? Yahoo Answers

    May 27, 2009· The second reson that a gold mine has to control the grade is that the milling process is usually designed to be most efficient at a certain grade. When mining a high grade zone, some of the gold may be lost and end up in the tailings unless the high grade ore is blended with low grade material, to provide the mill with a grade that it can handle.

  • GRADE CONTROL BLENDING AND SELECTIVITY FOR OPTIMAL

    medium and high grade ore stockpile destinations. Quality control ensures that grade control samples are representative and laboratory biases are minimised. Laboratory assays are confirmed correct to within a defined degree of accuracy and precision and the presence of “carryover” contamination between sample is monitored. Mining equipment

  • Methods to control excessive dilution AMC Consultants

    Increase grade control for ore that is visually difficult to differentiate from waste. This may involve more face sampling, different sampling techniques such as hand scanners, more infill drilling or even intermediate stockpiling until sample turn-around confirms if it is ore or waste.

  • Optimisation of the grade control procedures at the Yandi

    Dec 13, 2017· Effectiveness of ore grade control at operating mines depends on both the quality and quantity of the samples used. Therefore, optimisation of grade control procedures requires analysis of sample quality and their spatial distribution.

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  • Ore Grade Reconciliation Techniques A Review

    Reconciliations between Ore Reserves, Grade Control and Production. The adoption of this method requires that both grade control and ore reserves estimates be based on the same assumptions in respect of bulk densities of mineralisation, gangue and waste, mining block sizes, as well as appropriate assumptions about mining dilution and mining losses.

  • Open Pit Grade Control Geology & Geometallurgy

    The grade control data must be available in time to inform and be integrated into the mining plan if it does not do that, it is too late. In practical terms, the answer will relate to the vertical rate of advance of mining, overall pit geometry and the grade control-mine planning cycle time.

  • Ore Wikipedia

    The ore grade, or concentration of an ore mineral or metal, as well as its form of occurrence, will directly affect the costs associated with mining the ore. The cost of extraction must thus be weighed against the metal value contained in the rock to determine what ore can be processed and what ore is of too low a grade to be worth mining.

  • High grading Wikipedia

    Mining. In mining, high grading refers to mining out the portions of the orebody that has the highest grade of material to be mined. However, it may also refer to the concealment and theft of valuable gold or silver ore by miners for personal profit.

  • Grade Control Classification of Ore and Waste: A Critical

    For a mining operation, minimizing misclassification of ore and waste during grade control is of critical importance. This paper reviews grade control procedures for classifying ore and waste that are based on estimation and conditional simulation approaches. The similarities and differences of the procedures are first discussed in the light of an example.

  • Grade Control SpringerLink

    Abstract. In some mining operations, one of the most important roles played by the geologist is the supervision of grade control. In an open-pit operation, this involves the sampling of blast-hole cuttings produced by down-the-hole hammer drills and the classification of bench reserves into ore, low grade or waste material, or into various metallurgical types.

  • Mine Geology, Grade Control and Reconciliation SRK

    Our approach to geology, grade and mineralisation controls in the mine environment is based on addressing the material issues that affect the entire mining cycle from resource estimation to mine closure. Your operation benefits by ensuring that sound geological, grade and geometallurgical models underpin the entire mining process.

  • Ore Control & Dilution Solution Ore Controller Datamine

    Ore Controller is an intelligent ore control system that fits seamlessly into your mine’s existing operations and processes. Using a central database and customisable workflow, Ore Controller breaks up grade control tasks into clearly-defined activities, and guides each user through their day-to

  • Mining grade control software: Understanding your material

    Jun 29, 2017· Grade control is critical to practical excavation plans. Any inaccuracies at this stage can cause major setbacks to operational and business performance. Every mine comprises a different grade and tonnage. During exploration, grade control is a mining process to quality check and control the grade and variability of an ore. The purpose of grade

  • What Is "Ore Control" In The USGS? Mining Frequently

    What Is "Ore Control" In The USGS? What Is "Ore Control" In The USGS? Controls on emplacement of ore such as faults or other structural features. Term Definitions DEP_ID Site or deposit identification number within this database, used as a key linking all tables containing information about the site. Mining Claim News From The Diggings™

  • Grade Control & Reconciliation Mining Consultants SRK

    Understanding grade distribution and optimising mining selectivity through grade control is essential to achieving the mine plan. SRK has the expertise to implement, monitor, analyse and react to grade control data. This expertise allows the results to be reconciled

  • Grade control geological mapping in underground gold vein

    Grade control is a process of maximising value and reducing risk. It requires the delivery of tonnes at an optimum grade to the mill, via the accurate definition of ore and waste. It essentially comprises data collection, integration and interpretation, local resource estimation, stope design, supervision of mining and stockpile management.

  • How Mining Companies Improve Production Efficiencies and

    While a mining company has no control over metal prices, they can improve production efficiencies which will in turn lower production costs, increase their profit margins and ultimately boost the

  • How is mining lower grade ore's negative on the

    Dec 14, 2011· I have this question regarding the mining of lower grade ore's "How does mining lower grade ores affect the environment compared to mining higher grade ores? How is mining lower grade ore's negative on the environment? minimum grade for economic mining operations has decreased because of improved efficiency in the collection and

  • Open Pit Senior Grade Control Geologist MineListings

    Completion of end-of-month mining, forecast and stockpile reports. Ensures all record keeping and reporting is SOX compliant. Monthly reconciliation between ore reserve, grade control, actual mined and declared ore mined. Supervision and development of Grade Control

  • Mining Valuation Lesson: Cut-Off Grade Theory and Practice

    Dec 04, 2011· This week’s topic will be “cut-off” grade a term you have heard many times before, but is often overlooked or misrepresented. Yet, it is an extremely important factor in mining valuations. Cut-off Grade Theory and Practice. Consider a block of ore that

  • Reduce ore dilution and loss in open pit mines BMT

    The impact of blast movement on grade control. Grade control geologists spend many hours modelling the distribution of minerals throughout a rock mass based on data from drilling and assaying a significant investment. After all this effort, mining engineers blast the in situ rock so it can be efficiently handled in the mill. In open pit mines

  • Implementing an Ore Reconciliation System Supported by

    grade control model and mined grades should reflect the diluted ore cuts produced at this stage. The grade control model is typically the mineable portion of the short range model keeping the selective mining unit (SMU) in mind. In some surface operation the ore control polygons are surveyed out in the field defining dig boundaries.

  • Open Pit Senior Grade Control Geologist MineListings

    Completion of end-of-month mining, forecast and stockpile reports. Ensures all record keeping and reporting is SOX compliant. Monthly reconciliation between ore reserve, grade control, actual mined and declared ore mined. Supervision and development of Grade Control

  • Mining Valuation Lesson: Cut-Off Grade Theory and Practice

    Dec 04, 2011· This week’s topic will be “cut-off” grade a term you have heard many times before, but is often overlooked or misrepresented. Yet, it is an extremely important factor in mining valuations. Cut-off Grade Theory and Practice. Consider a block of ore that

  • Reduce ore dilution and loss in open pit mines BMT

    The impact of blast movement on grade control. Grade control geologists spend many hours modelling the distribution of minerals throughout a rock mass based on data from drilling and assaying a significant investment. After all this effort, mining engineers blast the in situ rock so it can be efficiently handled in the mill. In open pit mines

  • Implementing an Ore Reconciliation System Supported by

    grade control model and mined grades should reflect the diluted ore cuts produced at this stage. The grade control model is typically the mineable portion of the short range model keeping the selective mining unit (SMU) in mind. In some surface operation the ore control polygons are surveyed out in the field defining dig boundaries.

  • RECONCILIATION DELIVERING ON PROMISES ABSTRACT

    Grade Control (prediction) constraints on Reconciliation The grade control (or ore control) process involves the predictive delineation of the tonnes and grade of ore that will be recovered by mining. The predictions have a number of common characteristics across all mineralisation and mining types, from small, low production rate,

  • Ore Stockpiling Why are we doing this again?

    Apr 28, 2016· Grade Optimization: This stockpiling approach is used in situations where the mine delivers more ore than is required by the plant, thereby allowing the best grades to be processed directly while lower grades are stockpiled for a future date. Possibly one or more grade stockpiles may be used, for example a low grade and a medium-low grade

  • SAIMM Grade Control School 2019-Upcoming Events

    Jul 24, 2019· Grade control, the activity between Ore Reserve Estimation and product delivery to the metallurgical processes, is integral to efficient mining extraction and essential in achieving the life-of mine plan. It can be the biggest value-add or -loss steps in a mining operation. Quality Control processes in Coal Mining

  • Ore grades and mining Google Docs

    Mining and Mining Impacts. Part II: Ore Grades, Waste, and Remediation. Section II: Ore Grades and Mining. The grade of an ore is the concentration of the desired material within the rock. There is more metal (a higher concentration) in higher grade metal ores. Ore grades are often given in percentages or in units of ppm (defined below).

  • Logging Road & Creek Reveals High Grade Gold Ore! YouTube

    Jun 13, 2019· New logging road and creek reveal high grade gold ore along with arsenopyrite, chalcopyrite and galena based ores. High grade gold and silver ore

  • Mining Britannica

    Mining, process of extracting useful minerals from the surface of the Earth, including the seas. A mineral, with a few exceptions, is an inorganic substance occurring in nature that has a definite chemical composition and distinctive physical properties or molecular structure. (One organic

  • Using Portable XRF Analysis for Ore Grade Control in Mining

    Ore deposits are inconsistent in nature, having high concentrations of metals in one area but much lower concentrations in others. Mining geologists perform ore grade control in underground mining operations to figure out where the most profitable ore bodies are, in terms of location and mineral concentration variability. By performing ore grade control, mining operators are also reducing risk

  • Ore Reserve Estimation Method

    Estimates of the tonnage and average grade of ore deposits (ore-reserve estimates) are made for various purposes. They may be made by examining engineers as a basis for placing a value on a mining property in connection with reports on behalf of owners or vendors, on the one hand, or for prospective purchasers or lessees, on the other.

  • A deeper look Ontario Nature

    low-grade mineral deposits that are close to the surface while under-ground mining is generally used for deeper, concentrated deposits5. Open pit mining is used to extract ore deposits that are located close to the surface, since, on average, the cost per tonne of ore mined is lower than that for underground mining.

  • Understanding Cut-Off Grade 4 (Tonnage, Grade, and Costs

    Feb 17, 2018· Understanding Cut-Off Grade 4 (Tonnage, Grade, and Costs) or "Why is my mine losing money?" Published on February 17, 2018 February 17, 2018