JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD B.Tech III SURFACE MINING TECHNOLOGY Previous Question Paper (May - 2018 - R13)

Define the term “Surface Mining”.

List out the main parameters of a surface mine affecting its stripping economics.

List different parameters connected to drilling of blast holes.

List the blasting tools used in opencast mines.

State the factors influencing the selection of transporting system.

Define the terms “Fill factor and Swell factor”.

List the Optimization techniques for pit limit.

List the factors to be considered while opening coal seam in Surface mining.

List the various Placer Deposits and its causes of formations.

List the Environmental problems due to surface mining and their remedial measures.

Four benches are being worked by the opencast mining system. Height, width and face angle for each bench are 20m, 30 m and 75 degrees respectively. Find out the overall slope angle of the benches in Degrees?

Discuss the geological and other surface features of a mining block which make you feel that the block is suitable for exploitation by opencast system of mining?

Discuss the location, selection site for Opening up of Coal seam deposit with BOX CUT.

Discuss the Status of surface mining in India.

Explain the working principle of ripper.

In an overburden bench of an iron ore mine the following data were found: Height = 10 m, Burden = 4 m, Spacing = 3 m, Sub-grade drilling length= 1m, Collar stemming length = 3 m. If the diameter of the explosive column is 150 mm and the specific gravity of explosive and that of rock are 0.9 and 2.4 respectively. Calculate the powder factor in te/kg.

Explain different factors connected to drilling of blast holes.

A blast pattern is required with burden = 2.7 m; Spacing = 3.0 m, Hole diameter = 89mm; Sub grade drilling = 0.5 m; Hole depth= 8 m; No. of holes=50; stemming:2.5 m; Explosive density:0.85 kg/L. What is the powder factor?

State the classification of excavators.

Calculate the Total of overburden in m3 handled by the Dragline for a 15 yd3 Dragline is deployed in an overburden bench of an opencast mine. It works for 40 days at the rate of 6 hours per shift and 3 shifts a day. The cycle time, bucket fill factor, and operating efficiency of the dragline are respectively 50s, 0.8, and 75%.

Explain the operation and place of application of Bucket Wheel Excavator.

State the applicable conditions, merits and demerits of Surface Miner.

For an opencast coal mine to produce 3 million tones of coal per year, with an average stripping ration of 1:3 suggest the number and size of various HEMM required. Assume other conditions on your own.

Draw the layout organization bar chart for large opencast mine project which is known to you.

For an opencast coal mine to produce 10 million tones of coal per year, with an average stripping ration of 1:5 suggest the number and size of various HEMM required. Assume other conditions on your own.

Explain the improvements in truck dispatching system over the last two decades.

It is proposed to open a new Open Cast mine. Give the details of various aspects to be incorporated in such detailed project reports for Good Productivity?

In a mine for one shovel six trucks are assigned. The shovel loading time per truck is 5 min., and truck cycle time 20 min., Calculate the match factor.

Draw the layout and Describe the Principle, operation and working of Hydraulic mining system?

Discuss the under water mining by DREDGING method.