Iii min i sem q.bank 2016 17

1) MINE SURVEYING-I
2) SURFACE MINING TECHNOLOGY
3) MINE MECHANIZATION-I
4) MINE ENVIRONMENTAL ENGINEERING-I
5) UNDERGROUND COAL MINING TECH.

MRCET- Department of Mining Engineering Model Question Paper-1
B.Tech III Year - I Semester Examination – Academic Year (2016-2017)
MINE SURVEYING-I
Time: 3 hours Max. Marks: 75
Note:This question paper contains two parts.
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B consists
of 5 Units. Answer any one full question from each unit. Each question carries 10 marks and
may have a, b, c as a sub questions.
Part-A (25 Marks)
1. a) What is Magnetic Declination? (2)
b) How to use field books? (3)
c)What is line of sight or line of collimation? (2)
d) Distinguish between temporary bench mark and permanent bench mark? (3)
e)State the formula of area by planimeter? (2)
f)What is prismoid? Derive the prismoidal formula? (3)
g)What are the factors that contour interval depends upon? (2)
h)Distinguish between telescope normal and telescope inverted? (3)
i)What is Triangulation survey? (2)
j)What is Bowditch correction? (3)
Part-B (50 Marks)
2.A steel tape 20 m long standardized at 550
F with a pull of 10 kg was used for measuring a base
line, Find the correction per tape length, If the temperature at the time of measurement was 800
F
and the pull exerted was 16 kg.Weight of 1 cubic cm of steel = 7.86 gm., Wt. of tape = 0.8 kg
and E = 2.109 x 106
kg/cm2
. Coefficient of expansion of tape per 10
F = 6.2 X 10-6
? (10)
OR
3.(a)Explain the different methods of chaining on sloping ground?Derive the expression
forhypotenusal allowance?
(b) What are the instruments used in chain surveying? How is a chain survey executed in the
field? (5+5)
4.(a)The following staff readings were observed successively with level, the instrument having
been moved forward after the second, fourth, and eighth readings: 0.875, 1.235, 2.310, 1.385,
2.930, 3.125, 4.125, 0.120, 1.875, 2.030, 3.765. The first reading was taken with the staff held
upon a benchmark of elevation 132.135. Enter the readings in level book form and reduce the
levels. Apply the usual checks? Find also the difference in level between the first and the last
points?
(b) Find the radius of curvature of the bubble tube and the value of each 2 mm division from the
following average reading of the ends of the bubble and of staff 80 m away: (5+5)
I II
Staff readings 1.680 1.602
Eye piece end of bubble 20 10
Object glass end of bubble 10 20
OR
5.Differentiate between permanent and temporary adjustments of level? (10)

6) The following perpendicular offsets were taken from a chain line to a hedge:
Chainage(m) 0 15 30 45 60 70 80 100 120 140
Offsets (m) 7.60 8.5 10.7 12.8 10.6 9.5 8.3 7.9 6.4 4.4
Calculate the area between the survey line, the hedge and the end offsets by (a) Trapezoidal rule
(b) Simpson’s rule (5+5)
OR
7) A railway embankment 400 m long is 12 m wide at the formation level and has the side slope
2 to 1. The ground levels at every 100 m along the centre line are as under:
Distance 0 100 200 300 400
R.L. 204.8 206.2 207.5 207.2 208.3
The formation level at zero chainage is 207.00 m and the embankment has a rising gradient of 1
in 100. The ground is level across the centre line. Calculate the volume of earthwork. (10)
8) Distinguish between L.S and C.S surveying? (5+5)
OR
9).(a)Write the general procedure for measuring the vertical angle by theodolite surveying?
(b) What is trigonometric leveling? (5+5)
10) The table below gives the lengths and bearings of the lines of a traverse ABCDE, the length
and bearing of EA having been omitted.
Line Length(m) Bearing
AB 204 870
30′
BC 226 200
20′
CD 187 2800
00′
DE 192 2100
3′
EA ? ?
Calculate the length and bearing of the line EA? (10)
OR
11) (a)Write the procedure to conduct triangulation survey by using chain and compass?
(b) What is well conditioned triangle? Why is it necessary to use well-conditioned triangle?
(5+5)
********

MINE SURVEYING-I
Part-A (25 Marks)
1. a) What is Magnetic Meridian? (2)
b) What are the Systematic Errors in Taping? (3)
c) What is Bench Mark? (2)
d) What are the Temporary adjustments of a Level? (3)
e) What are the different methods of determining the areas of irregular bodies? (2)
f) The area on a map with a scale of 1:12000 as measured with a planimeter is 2.54 sq. in. What
is the area in acres? (3)
g) What are the basic rules for contour lines? (2)
h)Explain the need for different adjustments in theodolite? (3)
i) What is the function of Traversing? (2)
j) What is Departure and Latitude? (3)
Part-B (50 Marks)
2.What is EDM? Explain the procedure of measurement of distance using an EDM? (10)
OR
3.A line AB between the stations A and B was measured as 348.28 m using a 20 m tape, too
short by 0.05 m. Determine the correct length of AB, the reduced horizontal length of AB, if AB
is on a slope of 1 in 25, and the reading required to produce a horizontal distance of 22.86 m
between two pegs, one being 0.56 m above the other? (10)
4. (a)What is sensitivity of a level tube? How it is determined?
(b) Describing Fly Leveling? (5+5)
OR
5.Reciprocal leveling was conducted across a wide river to determine the difference in level of
points A and B: A situated on one bank of the river and B situated on the other. The following
results on the staff held vertically at A and B from level stations 1 and 2 respectively, were
obtained. The level station 1 was near to A and station 2 was near to B.
Instrument at Staff reading on
A B
1 1.485 1.725
2 1.190 1.415
a) If the reduced level of B is 55.18 m above the datum, what is the reduced level of A?
b) Assuming that the atmospheric conditions remain unchanged during the two sets of the
observations, calculate (i) the combined curvature and refraction correction if the distance AB is
315 m, and (ii) the collimation error. (5+5)

6.The following offsets were taken from a chain line to an irregular boundary line at an interval
of 10 m are 0, 2.50, 3.50, 5.00, 4.60, 3.20, 0 m. Compute the area between the chain line, the
irregular boundary line and the end offsets by:
a) Trapezoidal Rule
b) Simpson’s Rule (5+5)
OR
7.Compute the volume of earth work involved in constructing a farm pond of the following
size:
Size of the bottom: 6 x 4 m
Side slope: 2:1
Depth of pond: 4 m
Work out the cost of earth work also if it costs Rs. 50 per m3 (10)
8. (a) What are three indirect methods of locating contours?
(b) Explain the different characteristics of contours? (5+5)
OR
9.Explain the principle of Electronic Theodolite? (10)
10.Explain the principle of Triangulation in details? (10)
OR
11.The whole circle bearings of the lines of a closed traverse are given below. Find the included
angles of the traverse. (10)
Line AB BC CD DA
Bearing 780
48′20′′ 1520
31′40′′ 2510
18′40′′ 30
44′15′′
********

MINE SURVEYING-I
Part-A (25 Marks)
1. a) What is True Meridian? (2)
b) What are the personal errors in chaining? (3)
c) What is Height of Instrument? (2)
d) What are the Permanentadjustments of a Level? (3)
e) State the formulae to be used in average ordinate rule, trapezoidal rule and simpson’s rule for
calculation of area? (2)
f) State the formula to be used for calculation of volume of borrow pit for a depth of excavation
h1, h2, h3 of three corners of a triangle? (3)
g) What is horizontal equivalent and contour interval? (2)
h)What is face left observation and face right observation? (3)
i) What is the difference between open traverse and close traverse? (2)
j) What is closing error? (3)
Part-B (50 Marks)
2.What is the principle of chain surveying?What are the different sources of errors in chain
surveying? (5+5)
OR
3.The distance between two points measured along a slope is 126 m Find the horizontal distance
between them if (a) the angle of slope between the points is 60
30′ (b) the difference between the
level is 30 m (c) the slope is 1 in 4? (3+4+3)
4.(a)The reading taken on a staff 100 m from the instrument with the bubble central was 1.872m.
The bubble is then moved 5 divisions out of the centre and the staff reading is observed to be
1.906 m. Find the angular value of one division of the bubble and radius of curvature of the
bubble tube, The length of one division of the bubble is 2mm?
(b) Describing Reciprocal Levelling? (5+5)
OR
5.The following consecutive readings were taken with a level and 3 metre leveling staff on
continuously sloping ground at a common interval of 20 metres: 0.602, 1.234, 1.860, 2.574,
0.238, 0.914, 1.936, 2.872, 0.568, 1.824, 2.722.The reduced level of the first point was
192.122m. Rule out page field book and enter the above readings. Calculate the reduced levels of
the points and also the gradient of the line joining the first and the last points? (10)

6.The following table gives the corrected latitudes and departures (in metres) of the sides of a
closed traverse ABCD:
Side Latitude Departure
N S E W
AB 108 4
BC 15 249
CD -123 4
DA 0 257
Compute the area by (i) M.D method, (ii) D.M.D method, (iii) Departure and total latitudes,
(iv).Co-ordinate method (5+5)
OR
7.A rectangular plot ABCD forms the plane of a pit excavated for road work. E is point of
intersection of the diagonals. Calculate the volume of the excavation in cubic metres from
the following data:
Point A B C D E
Original
Level
45.2 49.8 51.2 47.2 52.0
Final
Level
38.6 39.8 42.6 40.8 42.5
Length of AB is 50 m and BC is 80 m. (10)
8. (a) What is direct methods of locating contour lines?
(b) What are the uses of contour line? (5+5)
OR
9.Write the difference between the repetition and reiteration method of horizontal angle
measurement? (10)
10.Distinguish between loose needle method and fast needle method in traversing? (10)
OR
11.The following interior angles were measured with a sextant in a closed traverse. The bearing
of the line AB was measured as 600
00′ with prismatic compass Calculate the bearings of all other
line if angle A = 1400
10′, angle B = 990
8′, angle C =600
22′ .angle D = 690
20′ (10)
********

SURFACE MINING TECHNOLOGY
Part-A (25 Marks)
1. a) What is Surface Mining? (2)
b) What is stripping ratio? (3)
c)What is sub grade drilling? What is its significance? (2)
d)What do you mean by Mine Life Cycle? (3)
e)Distinguish betweenpit slope angle and ultimate pit slope angle? (2)
f)What are the performance parameters of drills? (3)
g)What is match factor? (2)
h)A belt conveyor conveys coal having width 1.2m.The average cross-sectional area is 0.09 m2
and at a velocity 1.5 m/s. Find out thecarrying capacity of the belt conveyor if the bulk density of
coal is 1.4 t /m3
? (3)
i)What is placer mining and in which location it finds? (2)
j) State the limitation of a grader? (3)
Part-B (50 Marks)
2.What are the advantages and disadvantages of Surface Mining over underground mine?(5+5)
OR
3.(a)What is Box cut? Write the significance of selection of site of Box cut?
(b) What are the rules and regulations in order to make a bench in opencast mining according to
the DGMS? (5+5)
4.(a)What are the problems associated with drilling?
(b)Describe the application of scrapper? (5+5)
OR
5.Derive an expression for estimation of number of drill holes and length of the face required to
accommodate the above number of holes for a given mine production by taking your necessary
assumption? (10)
6) What is continuous method? Write the working principle of Bucket Wheel Excavator with
neat sketch along with the merits, demerits, capacity of the machine? (2+8)
OR
7) An opencast deposit having production is 2.5 MT /Annum with shovel –dumper combination.
Draw a layout of the mines by your own assumption as well as the man power required for
achieving the above target? (10)

8). (a) Describe the different conveying equipment are used for transporting the minerals in
opencast mines?
(b) Distinguish between hydraulic shovel and rope shovel? (5+5)
9).Write the different methodologies for doing the mechanized quarries over an underground
developed working zone? (10)
10).(a) What is ground sluicing in placer mining?
(b) Describe how sea bed deposits are formed? What are the advantages for doing placer mining?
(5+5).
OR
11).(a) Describe different problems are associated with environment during surface mining
operation?
(b) What are the preventive measures to take for avoiding the environmental pollution during
mining operation? (5+5)
********

Time: 3 hours Max. Marks:
75
Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries 10
marks and may have a, b, c as a sub questions.
Part-A (25 Marks)
1. a) List the pre-mining operations to be carried out for an open cast mine? (2)
b) Write the applicability of open cast mining? (3)
c) List the common breakdown of a dumper? (2)
d) State the problem associated with Blasting? (3)
e) State the applicability of a Dozer? (2)
f) What are the various statutory permissions to be obtained from the DGMS before starting an
open cast mine? (3)
g) State limitations of scrapper? (2)
h)List some of the statutory permission related to Blasting? (3)
i) List some of the minerals available in oceans and seas? (2)
j) State the different types of blast hole drills? (3)
Part-B (50 Marks)
2.(a).Explain the terms Burden and Spacing?
(b) Explain the importance of sub grade drilling?
(c) Compare opencast mining with underground mining? (3+3+4)
OR
3.(a)What are the various box cuts based on their location?
(b) Give an account of various technologies available and their applicability for opencast
mining? (5+5)
4. (a)Explain the working principle of ripper and its applicability?
(b) What are the different types of drill bits used in percussive drilling?
(c)Give the sequence of operations in opencast mining? (3+4+3)
OR
5.(a)Explain the working principle of scrapper and its applicability?
(b) Give the parameters to be considered for selection of Drilling machines?
(c)Give an account of problems encountered due to blasting in opencast mines? (3+3+4)
6.A coal seam is at a depth of 200m from the surface having a thickness of 6 m. It is proposed to
work by opencast mining. Give the equipment and manpower required and the layout of the
opencast? (10)
OR
7) Explain the working principle of Continuous Surface Miner along with its layout and its
advantages and limitations? (10)

8. (a) Give the organizational structure of a large opencast project with shovel dumper
combination?
(b) Explain the preventive measures taken while working on already developed pillars through
opencast mining? (5+5)
OR
9.(a)How is spontaneous heating dealt in opencast mines in
(i)Coal yards
(ii) Existing pillars
(b) What are the preventive measures to be taken in the machinery of opencast mines? (5+5)
10. (a) Explain the method of Hydaulicking?
(b) Explain the process of Dredging? (5+5)
OR
11.(a) What is Environmental Management Plan?
(b) Explain Environmental Impact Assessment? (5+5)
********

of 5 Units. Answer any one full question from each unit. Each questions carries 10 marks and
Part-A (25 Marks)
1. a) What is Bank width? (2)
b) What is Break Even Stripping Ratio? (3)
c)What is the limitation of Scrapper? (2)
d) What is fly rock? How to deal with that fly rock in opencast mines? (3)
e) State different types of crushers are used in opencast mines? (2)
f) State the general breakdown of dozer? (3)
g) What is safety Berms? (2)
h)State the types of ramp in opencast mines? (3)
i) What is powder factor? (2)
j) For overburden removal with shovel –dumper combination what are the factors that depends
on the optimum size of the dumper? (3)
Part-B (50 Marks)
2.(a)The opencast mines have four benches. The height, width and face angle for each bench are
13 m, 30 m and 700
respectively. The overall slope angle of the benches in degrees ?
(b) A haul ramp of 6% grade is to be constructed connecting a bench of 15 m height to the
surface. If the cost of ramp construction is 1 million rupees per km, what the cost of this ramp
construction in million rupees? (5+5)
OR
3.(a)Describe how to select underground mine and opencast mines?
(b) What is stripping ratio and what is its significance? (5+5)
4. (a)What are the performance parameter of drilling operation?
(b) What are the problems associated with blasting? (5+5)
OR
5.In an overburden bench of an iron ore mine the following data were found:.Height of the bench
= 10 m, Burden= 4 m, Spacing= 3 m, Sub grade drilling length= 1 m ,Collar stemming length= 3
m, If the diameter of the explosive column is 150 mm and the specific gravity of explosive and
that rock are 0.9 and 2.4 respectively, what is the powder factor in t/kg? (10)
6.Describe the working principle and operation of Dragline in a large opencast coal mine with
layout. Write the advantages, limitation, and capacity calculation of dragline? (10)

OR
7.(a) Describe the working principle of shovel with neat layout. Write the advantages and
disadvantages of shovel?
(b)Describe the operating parameters of the shovel? (5+5)
8. (a) A underground coal mine deposit having thickness 10 m is at a depth of 200 m has been
developed ? What are preventive steps to be taken to excavate the coal in opencast mechanized
method?
(b) Distinguish between cyclic method and continuous method? (5+5)
OR
9.Explain the design principle of large opencast mines? (10)
10.Distinguish between the method hydraulicking and dredging? (10)
OR
11.What are the recent developments in the deployment of heavy earth moving machineries in
surface mining? (10)
********

Model Question Paper-1MRCET- Department of Mining Engineering
B.Tech III Year - II Semester – Academic Year (2016-2017)
MINE MECHANIZATION-I
Note: This question paper contains two parts.
Part A is compulsory which carries 25 marks. Answer all questions in Part A.
Part B consists of 5 Units. Answer any one full question from each unit. Each question
carries 10 marks and may have a, b, c as a sub questions.
Part-A (25 Marks)
1. a) Write the name of the elements used for power transmission in a mine. (2)
b) Write about the principle of working of flexible coupling. (3)
c) Explain the following abbreviation. 6×19 FC-RH-OL-FSWR (2)
d) What are the merits, demerits of gravity rope haulage? (3)
e) Explain the working principle of diamond crossing. (2)
f) A locomotive weighing 15 tonnef travels round a curve at a speed of 30 kmph. If the gauge is
1 meter what should be the radius of curve so that there will be no thrust between the flanges of
the outer wheel and the outer rail? Super-elevation of outer track over the inner track is 85 m.
(3)
g) What are the disadvantages of diesel locomotives? (2)
h) Describe the working principle of shuttle car. (3)
i) What is auger drill? What are the applicability conditions for auger drills? (2)
j) What is the difference between conventional drill and jumbo drill? (3)
Part-B (50 Marks)
2. Describe the construction and working principle of shaft coupling and clutch used in mines.
OR
3. a) What are the types of gear used in mines? Write about the components of toothed gear.
b) A flat belt drives a pulley 686 mm diameter at 300 r.p.m. and the tension in the tight side is
2.5 times that in the slack side .If the maximum working tension in the belt is not to exceed 14.2
N per mm width, what belt width is necessary for transmission of 11 kW?
4. a) What are the merits of endless rope haulage?
b) An incline mine has to be equipped to produce 600 tonnes/day, the average gradient of the
seam is 1 in 20,the length of the haulage plane is 2000 meters. Given, rope friction is 1/20 and
tub friction is 1/50, tub capacity is 1 tonne and the tare is ½ of the coal it carries .Speed of rope is
4 km per hour. Net working time of the haulage is 6 hours per shift. Ultimate tensile strength of
rope is 160 kg/mm2
.Static factor of safety of rope is 6. Find out the motor power of the haulage.
( value of rope constant k is 0.36 and s is 50 kN/cm2
for rope)
OR
5. Write about the different types of ropes used in mines. How to take care and maintenance of
the ropes? What are the factors affecting selection of wire ropes?
6. Write notes on:
a) Types of stations in aerial ropeway

b) Application of aerial ropeway
c) Turn tables on curves
OR
7. Write notes on:
a) Haulage track structure
b) Ropes in aerial ropeway
c) 3-way finger switch crossing
8. Name the different types of locomotives used in mines and compare locomotives with rope
haulages. Discuss, in detail, the construction and operation of any one type of locomotive
(including safety features).
OR
9. Discuss briefly about the belt conveyor construction with all its parts.
10. What are the types of drilling used for coal and stone? Describe the construction and working
principle of jack hammer drill.
OR
11. Why pneumatic drills are not used in coal mines? Describe the construction and working
principle of the coal drills used in mines.
********

Part-A (25 Marks)
1. a) Compare pneumatic and hydraulic powers. (2)
b) Write about the principle of working of epicyclic gear. (3)
c) Differentiate between langs lay and regular lay in wire rope. (2)
d) What are the merits, demerits of direct rope haulage? (3)
e) Explain the working principle of joints in rail tracks? (2)
f) Differentiate between haulage rope and track rope in aerial ropeways. (3)
g) Define flame proof apparatus/enclosure and explain how it works. (2)
h) What is tractive effort? How it is related to drawbar pull? (3)
i) Differentiate between stopper and drifter used in mines. (2)
j) What are the types of supplies of electricity used for coal drills and what is the difference
between them? (3)
Part-B (50 Marks)
2. Write notes on:
a) Different types of gears
b) Pneumatic power
c) Brakes used in mines
OR
3. a) What is the working principle of belt drive?
b) In a belt drive the belt is running at 20m/s transmits 5 kW power. If the permissible pull of the
belt is 15 N/ mm of width of belt, calculate the tension at the tight and slack side of the belt and
also the width of the belt required.Angle of lap= 1500
, co-efficient of friction between belt and
pulley = 0.4
4. What safety devices are to be provided on the haulage roadways to prevent runaway of tubs?
Discuss briefly the construction and operation of each one of it with the help of diagrams.
OR
5. a) Describe about the Endless rope haulage used in mines.
b) A direct rope haulage 500 mtr long and 1 in 10 inclinations. Coal tubs haul up the road in the
set of 5 , using a rope of 18 mm diameter.
. The tub has a tare weight of 500 kgf and capacity of
500 kgf of coal. What should be the weight of rope for the duty? Calculate the power of the
electric motor to work the haulage if the maximum speed of rope is 10 km/h. Friction for tub =
1/10 and friction for rope = 1/50.(The rope has constants as k= 0.36 and s= 52 kN/cm2
)

6. Write briefly about the construction and working principle of aerial ropeway with its
individual parts?
OR
7. Write notes on:
a) Types of crossing with layout used in haulage track
b) Essentials of a good haulage track
8. Write notes on:
a) Electric battery locomotive
b) Shuttle car
OR
9. a) What are the merits of scrapper chain conveyors?
b) Find the maximum size of train which can be started up a gradient of 1 in 200 at an
acceleration of 0.045m/s2
by a locomotive of weight 10 tonnef if the adhesion to the track is
2246 N per tonnef and the friction resistance coefficient is 0.01.
10. What is rotary drilling? Describe the working principle of coal drills with its merits and
demerits.
OR
11. Write notes on:
a) Jack hammer drill
b) Jumbo drill
********

Part-A (25 Marks)
1. a)In a conveyor belt drive the tension on the tight side is double that on the slack side. If the
value of friction coefficient is 0.3, find the angle of lap required if the belt is not to slip on its
driving drum. (2)
b) Write about the principle of working of drum brake. (3)
c) What are the types of clips used in endless rope haulage? (2)
d) What are the merits, demerits of endless rope haulage? (3)
e) Explain the working principle of turn table. (2)
f) Write the application of aerial ropeway in India. (3)
g) Differentiate between diesel locomotive and electric locomotive. (2)
h) What is a bridge conveyor? Where it is used in underground coal mines? (3)
i) What are the basic types of drills used for coal and stones? (2)
j) Describe the principle of air leg. (3)
Part-B (50 Marks)
2. Write notes on:
a) Construction and working of fluid coupling
b) Hydraulic and pneumatic power
OR
3. a) Describe the working principle of clutch.
b) A conveyor belt running at 500m/min transmits 5 kW. The angle of lap is 1600
and the
coefficient of friction between the belt and the pulley is 0.3. If the permissible pull in the belt is
16 Newton per mm width, calculate the tension on the driving side and the width of the belt
required.
4. Write notes on:
a) Direct rope haulage
b) Procedure for rope splicing
c) Lang’s lay and ordinary lay
OR
5. a) Explain about any two safety devices used on haulage roads.
b) An endless haulage operates on a roadway 800 m long dipping at 1 in 15 and draws 600
tonnes of coal in a shift ( 1 shift = 7.5 hours effective time). The loads weigh 1500 kgf each and
the empties 500 kgf. The rope weighs 3 kgf/m, tub friction is 1/50 and the rope friction is 1/10.

Speed of the rope is 4 km/hr. Estimate the power required at the surge wheel. The loads are
pulled up the gradient.
6. Write briefly about the haulage track in a mine with the essentials for a good haulage track.
What are the types of joints and crossing used for haulage tracks?
OR
7. Answer all:
a) Discuss the construction of aerial ropeway.
b) A locomotive weighing 15 tonnef travels round a curve of 80 m radius at a speed of 30 kmph.
If the gauge is 1 meter what should be the super elevation of the outer rail over the inner rail so
that there is no thrust between the flanges of the outer wheel and the outer rail?
8. Write notes on:
a) Trolley wire locomotive
b) Gate end stage loader
OR
9. a) What is tractive effort and drawbar pull ?
b) A locomotive weighs 15 tonnef and the adhesion to the tracks is 2246 N per tonnef is moving
up in an adverse gradient of 1 in 5.The running resistance of the locomotive is 67 N per tonnef.
Calculate the coefficient of adhesion and drawbar pull which the locomotive is capable of
exerting.
10. Write notes on:
a) jack hammer drill
b) coal drill
OR
11. What is jumbo drill? Describe the construction and working principle of the jumbo drills
used in mines.
********

MINE ENVIRONMENTAL ENGINEERING-I

B.Tech IV Year - I Semester – Academic Year (2016-2017)
Part B consists of 5 Units. Answer any one full question from each unit. Each questions
carries 10 marks and may have a,b,c as a sub questions.
Part-A (25 Marks)
1. a) Define equivalent orifice of a mine? (2)
b) Define motive column? (3)
c) What is splitting of air? (2)
d) What is composition of mine air? (3)
e) What is meant by NVP? (2)
f) What is turbulent flow? (3)
g) What action necessary when wet bulb temperature exceeds 30.5º C? (2)
h) What are the causes of natural ventilation? (3)
i) What is outburst? (2)
j) What is central and boundary ventilation? (3)
Part-B (50 Marks)
2. Discuss about methane layering?
OR
3. What are sampling apparatus used for the determination of mine atmosphere?
4. What are the sources of heat in mines?
OR
5. What are the different methods of improving the coding power of mine air?
6. What is natural ventilation and the method of calculation of NVP from air density?
OR
7. a) On what factors the mine fan in selected and write about fan testing types?
b) Brief about control capacity of mine fans?
8. What are standards of ventilation as per CMR 1957?
OR
9. Write about auxiliary fan and booster fan?
10. Calculate the quantity of air required as per statute if in a persons ventilation split employing
25 in a shift and 50 persons in a large shift, producing 450 tonnes of output daily.Draw a line
diagram of ventilation layout neatly?
OR
11. Write the procedure of conducting ventilation survey?
********

Part B consists of 5 Units. Answer any one full question from each unit. Each questions
carries 10 marks and may have a,b,c as a sub questions.
Part-A (25 Marks)
1. a) Define static pressure? (2)
b) What is meant by fan characteristic? (3)
c) How does the speed of a mine fan affect the air quantity water gauge? (2)
d) What should be the air velocities of working plane? (3)
e) What do you understand by adequate ventilation? (2)
f) How do the resistance of airway changes when fans in parallel. (3)
g) What are the materials used for air crossing? (2)
h) Define mechanical efficiency of fan? (3)
i) What is relative humidity? (2)
j) Name the different damps? (3)
Part-B (50 Marks)
2. Discuss about the different methods of methane drainage?
OR
3. What is the composition of mine air atmosphere and write about different damps occur in
mine?
4. What is effect of heat and humidity on human being?
OR
5. a) What are the laws of air flow?.
b) Compare the forcing fan with an exhaust fan?
6. What are principle types of mine fans and their principle of operation?
OR
7. Discuss about the operation of fans in series and parallel?
8. a).What are the permissible air velocities as per CMR 1957
b). Write about reversal of air current
OR
9. Write about fan drift, evassee , diffuser and face ventilation?
10.a) Write about hardy cross method

b). Brief the advantages and disadvantages of ascentional & descentional ventilation?
OR
11.a) Draw the layout of ventilation system of a metal mine
b) What is meant by splitting of air
********

Part-A (25 Marks)
1. a) What are the artificial aids to natural ventilation? (2)
b) What are the causes of natural ventilation? (3)
c) How do the resistance of airway changes when fans in series? (2)
d) How do the resistance of airway changes when fans in parallel? (3)
e) What is meant by NVP? (2)
f) Why do the reversals of ventilation of air is done? (3)
g) What is the object of ventilation survey? (2)
h) Define mechanical efficiency of fan? (3)
i) What is the principle of centrifugal fan? (2)
j) Describe the principle of air leg. (3)
Part-B (50 Marks)
2. Write about the origin, occurrence, physical and physiological properties of mine gases?(10)
OR
3. Discuss about the monitoring and analyzation of mine gases? (10)
4. Describe the different mine atmosphere measuring instruments? (10)
OR
5. Discuss about the different flow control devices? (10)
6. Write about the suitability, merits and limitations of mine fans? (10)
OR
7. Discuss about their efficieneies and characteristics? (10)
8. Discuss about ascentional and descentional ventilations and homotropal and antitropal
ventilation system with layouts? (10)
OR
9. Write about overlapping ventilation system air a long heading? (10)
10. Calculate
a) The motive column
b) The NVP (assuming barometric pressure in D.C shaft is 750 mm of h.g) if the mean air
temperature in DC shaft 400 M deep in 28ºC and uc shaft is 38ºC ? (5+5)

OR
11). A total quantity of 100 m³/min of air passing through two splits. One airway is 2.5 m×1.5 m
and 100 m long. And other, with similar lining is 2 m×1.5 m and 125 m long. Calculate the
quantity of air passing in each split? (10)
********

UNDERGROUND COAL MINING TECHNOLOGY

Part-A (25 Marks)
1. a) What is development ? (2)
b) What is depillaring (3)
c) What is hydraulic mining? (2)
d) What is horizon mining (3)
e) What is the maximum size of gallery as per CMR 1957? (2)
f) What is meant by contiguous seam? (3)
g) How many types of methods of depillaring? (2)
h) How many methods of working on longwall? (3)
i) What is continuous miner? (2)
j) What is meant by gates roads in longwall? (3)
Part-B (50 Marks)
2. On what factors the size of the mining property depends?
OR
3. Describe horizon mining method, its advantages and disadvantages?
4. What are the consideration for the choice and suitability of board and pillar development?
OR
5. What are the conditions suitable for mechanized system of development?
6. What are the preparatory arrangements observed before depillaring operations?
OR
7. a) Write in detail the sequence of operations in depillaring with caving method?
b). Discuss about the method of depillaring by stowing?
8. What are the types of longwall method of working giving their advantages and disadvantages?
OR
9. Write on the mechanized longwall face organization?
10. What is hydraulic mining? Write in brief the operation of getting coal and types of transport
of coal?
OR
11. Write about the support system of longwall mechanized face.?
********

Part-A (25 Marks)
1. a) Write on methods of approaching coal seam. (2)
b) What is meant by proved indicated and inferred reserves? (3)
c) What factor the size of pillar depends as per CMR 1957? (2)
d) Calculate the percentage of coal in development working assuming your own conditions?
(3)
e) What is power pack? (2)
f) What are bridge conveyor & its purpose? (3)
g) Write about methods of line extraction? (2)
h) What is meant by stowing? (3)
i) On what factors the length of longwall face depends? (2)
j) Write about systematic support rules? (3)
Part-B (50 Marks)
2. What factors are considered for mine planning?
OR
3. On what factors the production capacity of mine depends?
4. What are the advantages and disadvantages of board and pillar method of mining?
OR
5. How to determine the size of panel by assuming your own conditions?
6. Discuss about the principle and design of pillar extraction.
OR
7. Draw layouts of manual and mechanized development districts with organization?
8. Describe about different longwall layouts.
OR
9. Discuss on shape and size of development of gate roads?
10. Discuss the sequence of operations of shearer is a mechanized longwall face, Calculate the
amount of coal in coal seam
OR

11. Longwall panel having thickness of 1.2 m, with length of face 110 meters and web of the
shearer is 0.6m. cutting 2.5cuts(specific gravity of coal is 1.5)
********

Part-A (25 Marks)
1. a) What are the types of approaches to a coal seam. (2)
b) What is meant by goaf. (3)
c) What is exploration? (2)
d) What is air blast? (3)
e) Write about geological disturbances in mines. (2)
f) What is meant by B.O.S.? (3)
g) What are the equipments used in longwall mining (2)
h) Describe chock sheild? (3)
i) What precautions are observed against inundation? (2)
j) On what factors the length of longwall face depends. (3)
Part-B (50 Marks)
2. On what factors the choice of selection of vertical shaft and incline drifts depends?
OR
3. Discuss about the reserves of coal seam and their classification.
4. What are the conditions suitable for the application of mechanized mining?
OR
5. Discuss about the deployment of manpower in a mechanized depillaring district by drawing
the layout of transport system?
6. Write about the safety organization adopted at mine area and company level?
OR
7. What are the statutory provisions to be observed for depillaring operations?
8. Discuss about the salient features for the success of longwall mining over board and pillar
methods?
OR
9. What are the plant and equipment used in longwall face with their specifications?
10. Describe about the support system of longwall gate roads.
OR
11. Discuss about the methods of mining of steeply inclined seams.
********

Iii min i sem q.bank 2016 17

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