(b) A Contour plan showing the spot levels and contours at 1 MT interval on a large scale.
(c) Compression factor should be known before.
To the measurement of coal stock, prepare the position of the stock approximately level.
Before the start the stocked of coal in yard, complete survey work and take reduced level at 2mt or 5mt interval of original ground level.
After a period when required the volume of the stock, complete the survey work in three steps.
(a) Survey and levelling work of bottom of the stock.
(b) Survey and levelling of the slope of the stock.
(c) Survey and levelling of the top of the stock.
Reduced level of the above steps taken 2or 5mt interval.
A plan of large scale prepare and write the both reduced level in different colour of 2or 5mt interval.
Calculate the area of each cross-section and finally calculate the volume of coal by the trapezoidal rule.
Ton of coal = volume of coal in m3 × Density of stock yard
FOR MORE ABOUT VOLUME CALCULATION READ FOLLOWING BOOKS
DISVANTAGE OF THIS METHOD
This method is take more time and more labours.
This method is used for small stock yard.
(B ) Survey by Total Station:- Survey by total station is used for rapid measurement and for large quantity of stock yard. In this method the random readings taken as per actual profile of stock yard or on the cross sections line. After surveying completed calculate the volume of the profile volume calculation software.
(C) Survey by 3D Laser scaning Technology
:- 3D Laser scaning Technology also use in measure the coal stock. Read More(D) Survey by Drone Survey:-Drone Survey has the basis of aerial Photographic Surveying. It is also used in volume measurement in coal stock yard. READ MORE
Note: (A) compression factor change due to size, age, mode
(B) Large stocks get more compressed then small stocks
( C) Different grade of heap also measured.
Calculation from software based on https://www.technoupendra.com/2020/03/how-to-create-tin-volume-surface.html surface.
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