Which are the method that are used to ore reserves calculation?
Three main groups of ore reserve estimation methods are presently used worldwide: Conventional (Classical), Statistical and Geosta- tistical ones.
What is included area method?
Another method, known as the triangle method, requires that we connect adjacent holes into triangles. The included area of each triangle is assigned the characteristic not of a single hole, but of the weighted average of the three holes forming the triangle.
How are mining reserves calculated?
For example ,if the density of the ore = 1.35 tons/m3. Then ,for 1st case, ore reserves =320000*1.35 =432000 tons. For 2nd case, ore reserves = 40240*1. 35 =54324 tons.
What is the purpose of ore reserve estimation?
In mining, ore resource and reserve estimation is used to determine both the quantity and quality of an ore deposit, also called tonnage and estimated economic value. It can be performed initially to assess mineral resources, but also along the mining process to calculate the remaining ore reserves.
What is the triangular method of ore reserve estimation?
Triangular method By using triangular method, the area of the ore body is calculated After that , this calculated area is multiplied with average thickness of the ore to calculate the volume of the ore body The average thickness can be calculated by Using known thickness of the ore body Using grade and the …
What is tonnage factor?
The tonnage factor provides the mechanism for the conversion from volume of ore to weight of ore. 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.
What is an MRE in mining?
An inferred mineral resource is that part of a Mineral Resource for which quantity and grade or quality can be estimated on the basis of geological evidence and limited sampling and reasonably assumed, but not verified, geological and grade continuity.
What is tonnage factor in mining?
How do you calculate ore?
Computation of Tonnage and Grade of Ore by Blocks The volume divided by the volume-per-ton factor gives the tons of ore in the block. Multiplying the tonnage in each block by its average assay value, adding the products, and dividing this sum by the sum of the tonnages gives the average assay value of all the blocks.
What is ore tonnage calculation?
4.95 = sp gr of ore. If the ore volume has been computed in cubic meters, the volume multiplied by the specific gravity is the tonnage in metric tons directly.
What is grade of an ore?
The grade of ore refers to the concentration of the desired material it contains. The value of the metals or minerals a rock contains must be weighed against the cost of extraction to determine whether it is of sufficiently high grade to be worth mining, and is therefore considered an ore.
What is the tonnage factor?
What is clamp factor?
Clamping force is an important factor in the injection molding process. It is basically a safety measure implemented to operate the injection molding setup. A close mold is used to achieve the desired results. This mold is clamped in place during the operation using a clamping unit.
What is block model in mining?
The block model is created using geostatistics and the geological data gathered through drilling of the prospective ore zone. The block model is essentially a set of specifically sized “blocks” in the shape of the mineralized orebody. Although the blocks all have the same size, the characteristics of each block differ.
How do you calculate tonnage of ore?
How do you calculate ore tonnage?
What is assay value of ore?
An assay value is the quantity of an ore’s valuable elements, calculated by multiplying its assay grade or percentage of valuable elements by its dimensions. For precious metals, this figure is generally set out in troy ounces per ton of or or assay ton.
What are the types of ores?
There are mainly four kinds of ores like Ores Oxides; Ores Carbonate; Sulphide Ores; Ores Halides.
What is the polygon method?
The polygon method is an old and established approach based on a simple geometric algorithm, in which we construct a polygon around each hole to determine an area of influence for that hole; and then the total volume directly beneath the polygon is assigned the same values as the drill hole from which we constructed the polygon.
How do you make a circle with limits?
By the Method of Limits One can visualize a circle through the process of incrementally adding sides to a regular polygon. A triangle becomes a square; the square becomes a pentagon; the pentagon becomes a hexagon; the hexagon becomes a heptagon; the heptagon becomes an octagon; and so on. A 20-sided icosagon.
How to construct regular polygons from a circle?
If you have ever wondered about how to construct regular polygons from a circle, you’re reading the right article. Draw a straight line using the protractor. This will be the center line of your circle (dividing it into semi-circles). Align the protractor so that both 0° and 180° lie on the center line. Mark the center point.
Is a polygon a tool or an end?
It, like computers or even words, is not an end in itself, only a tool. To say a polygon of ever increasing sides never makes it to a true circle is short-sighted. A circle is a polygon that has had its number of sides increased over endless time.