belt speed lump size/material density maintenance environment temperature and the proper CEMA series of idler to handle the maximum calculated idler load CEMA B load rating based on minimum L 10 of 30 000 hours at 500 rpm CEMA C load rating based on minimum L 10 of 30 000 hours at 500 rpm CEMA D load rating based on minimum L 10...

A mining company will proceed with the cost of a feasibility study generally once it has proved continuity of its ore deposits confirmed by samplings and or drilling on a relatively detailed grid that allows for fairly precise determination of tonnage density mineral and metal content and is that part of the orebody that economic viability...

appropriate mining method is selected based on technical economic and environmentally accountable considerations The first step in selecting the most appropriate mining method is to compare the economic efficiency of extraction of the deposit by surface and underground mining methods This section reviews surface mining methods and...

Feb 27 2016 0183 32 Mining is the mother industry for other industri For effectiveness in mining different methods have been approached keeping in mind the production and safety One of such methods is the Bord and Pillar method of mining Bord and Pillar method of mining is one of the oldest methods 3...

the mining technologies currently in use on Federal leases and the potential for commer-cial mining technologies to extract Federal coal reserves from deep underground seams The chapter discusses three surface mining techniques that are used in the West 1 area strip 2 open pit and 3 terrace pit two methods of underground mining in...

For the calculation of the volume and the tonnage of ore deposits there is a variety of available methods to choose from each suited for a particular deposit These methods fall into two categories reserve calculation on the basis of cross-sections and on the basis of longitudinal planar sections or level plans respectively...

In the English system the tonnage factor is normally expressed as cubic feet per ton of ore In the metric system the tonnage factor is the specific gravity of the ore Probably the most accurate method of determining specific gravity of an ore is to calculate an average specific...

size determination to the readers The present paper thus gives an overview of some commonly used terms and techniques that need to be specified for a sample size calculation and some techniques for determination of sample size and also describes some sampling methods for...

tons and 350 operating days per year are assumed Tonnage is modified from published reserves to account for recovery and dilution which vary from mining method to mining method and to a lessor extent mine to mine The adjustment factors we use table 1 are the same as Camm s 1991 Table 1 Mine dilution and recovery factors...

ADVERTISEMENTS In this article we will discuss about the types of drilling methods used in mining The types are 1 Percussive Drilling 2 Rotary Drilling Method 1 Percussive Drilling In this method which is the oldest one of drilling the hole is drilled by striking...

Mining method selection is the first and most important problem in the mining method selection and demonstrates the calculation of the weighting factors for each selected parameter This study has mineable ore tons orebody grades and mineral value Technical factors such...

In the Engineering and Mining Journal there appeared an article by Fred T Greene describing a method of measuring stopes by the use of strings a clinometer and a tape I had occasion to use a somewhat similar method for the purpose of accurately ascertaining the volume of a very irregular drift connecting two min This drift was an important factor in a lawsuit in which it was necessary...

Metallurgical ContentORE RESERVE CALCULATIONSMINERAL ORE RESERVE Case 1MINERAL ORE RESERVE Case 2MINERAL ORE RESERVE Case 3 The usual method of sampling mineral deposits is to drill holes and assay the sludge or core Though the results thus obtained may not represent the true average value of the deposit it is on these results that estimates of practically all...

Many of the particles encountered in mining are characterized by sieves classifiers Recent advances in computers cameras and software make image analysis practical for samples with sizes larger than several microns in diameter As particle size decreases sieving and/or dynamic image analysis becomes more arduous or impossible and laser diffraction becomes the technique of choice...

Cubical opening method Dig up a pit of 1mx1mx1m size and weight all the material this weight is tonnage factor For sulphide ore deposit at initial exploration this method is not applicable In case of iron ore limestone rock Phosphate is applicable in the mining stage normally bulk density is determined by this method Conventional density...

mining method economics With all the rigour to calculate a constrained by the mining method grade tonnage curve it is first necessary to calculate estimate or simulate the resources in blocks and then to simulate the mining method afterwards to obtain the minable reserv The problem...

Jun 13 2017 0183 32 HOW TO CALCULATE FLEET SIZE The optimal number of vehicles in a fleet varies with time depending on aspects such as market demands the service level and available budget and for this reason the organization has to establish when to calculate the optimal number of vehicles that are needed for a certain period of time The resulting scenarios for each period of time are...

Jan 09 2016 0183 32 Table 1 is the calculation of the mining cutoff grade for a copper project with the following parameters 30 kt/d 33000 st pd of ore mined for 20years 300 000 000 capital cost include replacement capital 100 mining cost per ton of ore 095 mining cost per ton of waste 300 processing cost per ton of ore 100 general and administrative...

These calculations are used to calculate various skeleton parameters including ash and calorific value that let you determine the grades of your coal Read more SGS global teams of chemists and experts use a range of coal analytical calculations and indexes to arrive at the calorific values total hydrogen Coke Reactivity Index CRI and Coke...

mining operation and we must take into account the number of possible steps from the extraction site stope/face to the shaft or ramp portal The total system has been established - as a combination of various types of equipment - such that it is most applicable to the ore deposits being mined the mining methods employed and the mine layout 1...

The issue of balancing dilution and ore recovery is a challenging one as profitability is to be optimized while not effecting the efficiency of operation It has been noted that instead of utilizing labour intensive mining methods to high tonnage bulk mining has decreased the ability to control ore recovery...

methods of calculating tonnage in mining Cubical opening method dig up a pit of mxmxm size and weight all the material this weight is tonnage factor for sulphide ore deposit at initial exploration this method is not applicable in case of iron ore limestone rock phosphate is applicable in the mining stage normally bulk density is determined by this method conventional density...

Determine the BESR in mining and processing a 060 copper ore deposit if the selling price of copper in concentrate is 163/kg and the overall unit costs are 680/ton and the cost of handling unit weigh of waste is 750/ton The overall recovery is 92...

Sep 06 2017 0183 32 The third method that is commonly used to calculate earthworks volumes is the triangular prisms method This is by far the most technically difficult method but is also the most accurate This method starts by triangulating the existing terrain This involves joining the points in the terrain to create a continuous surface of connected triangl...

Re Converting cubic volume to tonnage When you say tonnage is that register ton Or ton as in weight Register ton is a unit of volume equal to 100 cubic feet about 28316 cubic meters 12096 / 28316 = 27 register ton As the register ton is a unit of volume then it...

methods of calculating tonnage in mining Tonnage-cutoff model and average grade-cutoff model for a single The cutoff has great influence on the reserve and resource calculation of constant length along exploration or mining works the tonnage-cutoff and found to be consistent with the results obtained by the traditional geometric block method...

This chapter explains the different ways the weight of waste or diverted material can be measured or calculated Note that the volumetric and per capita methods may only be used by facilities approved to submit annual returns Methods applicable to all disposal facilities Why do I need to specify how I will calculate tonnages The levy is calculated on the net tonnage of...

Sep 19 2019 0183 32 If the purpose of the calculation is to obtain a general estimate for the tonnage of coal on a property or a regional average resource estimate site-specific information the details of coal composition are not needed and an average coal density is commonly used for the calculation Relative coal density is measured as specific gravity...

Room and pillar variant of breast stoping is a mining system in which the mined material is extracted across a horizontal plane creating horizontal arrays of rooms and pillars To do this rooms of ore are dug out while pillars of untouched material are left to support the roof overburdenCalculating the size shape and position of pillars is a complicated procedure and is an area of...

As 1 ton equals 90718474 kilograms and 1 tonne equals 1 000 kilograms just remember the difference between tonne and ton is approximately 10 mnemonic less letters less outcome For more information about how to calculate the metal value of a deposit as a whole I recommend you to read the mineral deposit value page too...

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