PRANJAL PATHAK

3rd Year, B.Tech, Mining Engineer IIT (BHU) Varanasi

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It gives me immense pleasure to acknowledge with deep sense of gratitude and appreciation to all those who have extended their co-operation and support throughout the period of summer internship. I would like to extend my sincere thanks to Mr. T N. Gunaseelan, Managing Director and Mr. Pankaj Kr Sinha, Director, DMT-IMC for giving me this internship opportunity. I am indebted to my mentors Miss Sripriya and Mr. Navneet Singh Tomar for their guidance, sustained interest and efforts which helped me to carry out various projects and operations during this stay. I gratefully acknowledge Mr. Prashant Tiwari, Mr. Sandip Roy, Mr. Sundar Raj, Mr. Mihir Chandra, Miss

Sharmila Patra, Mr. Somnath Gain, Mr. R Karthikeyan, Mr. Tushar Chakraborty, Mrs. Indrani Basak, and Mr. Amitava Maji for their guidance, involvement and useful advices during the internship. I also gratefully acknowledge Mr. Ajay Kumar Singh, Mr. M.M Mukherjee, Mr. Deepak Kumar Lamba, Mr. Phalguni Guha, and Mr. P. Kumar for their valuable advices and knowledge sharing interactive sessions. Lastly but not the least, I would also like to thank Mrs. Debasmita Mukherjee for her constant efforts and rendered help in relations department.

Pranjal Pathak IIT BHU Varanasi

Intern 2015’

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This is to certify that Mr. Pranjal Pathak, 3rd Year, B.Tech student of

Department of Mining Engineering, IIT (BHU) Varanasi, has successfully

completed his summer internship.

The training was scheduled from May 13, 2015 to June 27, 2015 at DMT - IMC

Consulting (P) Limited, Kolkata, West Bengal.

During this period, he has shown keen interest towards understanding the

techno-economic aspects of mine analysis, mine planning, equipment

selection and risk analysis. He is a sincere student and we wish him all the

best for his future.

Mr. T N Gunaseelan

Managing Director, DMT - IMC

Mr. Pankaj Kr Sinha Director, DMT - IMC

Date: June 27, 2015

Place: DMT-IMC, Kolkata

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The reason I choose to follow a mining consultancy internship is because I wanted to benefit from the experience. I wanted a new challenge and to learn, improve and develop new sets of skills which can be industrial as well as practical. I wanted to put my knowledge into its applicability in real life situations and benefit from the learnings.

Before my internship began my expectation where high, because it involved an a office working internship. I already followed a previous internship in Italy and already knew what to expect from an internship in general. Before my internship began, I spoke with Saurav Singh (Ex IIT BHU mining senior) and he described what kind an internship it is going to be. The company is named DMT and they specialize in Mining Consulting, planning and creation of mine plans and various other mining tools. It’s a mining consulting company that is considered to be one of the best in India as well as in abroad. The description of my work, activities and assignments exist from; observing and researching, developing new ideas and strategies, updating contents, assisting with events and planning and executing mine plan developments. Also I did my own research by going through the company’s website to get an impression and understanding what kind of company it was.

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The first day contributed towards the introduction towards the working environment in the office in various departments such as Geological Survey, Geophysics, Sampling room, Coffee room, Conference hall and we were briefly explained about the on-going works. Then we met Senior and junior Mining Engineers and Geologists along with working Director and Managing Director. Then we were introduced to the various Annexures, data sheets to which we helped in sorting them in a sequence for at-hold Usha Martin Ltd.-Mine Plan. At the end we were given an introductory lecture about the company and projects associated with it. Point to be noted was the Flat hierarchy status among the employees.

The second and official day started quite early with the update on the AutoCAD’s basic-classes which began today which was followed by preparation of Set 1 of Annexure-15 on the basis of required chemical analysis of samples collected on-site.

14th May, Thursday – 19th May, Tuesday:

On the following days, sessions were quite productive:

First I finished the editing of Down-The-Hole Analysis with grading-sampling and

replaced the old values with newly obtained Easting, northing, collar and depth

values in the data sheet of Usha Martin Ltd Mine plan.

Then we attended the AutoCAD class of about 2 hr. By Laxman Sir.

We were given a Topographical map to practice upon.

Then we began preparing for the first Saturday’s presentation.

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What I learnt from these sessions:

I gained some more knowledge on preparation of Annexures which are basically

written evidences submitted by the consultant company along with the Mine

Plan for legal documentation. Having error in one data or value could lead to the

omission of whole set of Annexures prepared, so I carefully edited/added the

values from worked data sheet in MS Excel sheet.

In AutoCAD, I learnt about the various functions and operations used during Map

preparation which included functions like Point, Line, Polyline, Rectangle,

Polygon, Circle, Extend, Trim, Join, Break, etc.

We were introduced to the Digitisation of a topographical map which is used in

Mine survey for identification of seam details, thickness, extent and information

on the 3D development of the lease area to be mined.

We were also introduced to the layer formation, boundary formation of area to

be mined, borehole formation etc.

We met the Managing Director, Sir T N Gunaseelan on 4th day, and he asked us about our personal choices and future plans. He was very friendly and down to earth, he offered us to opt for different areas to work under and join current ongoing projects under different senior consultants, depending upon our personal choices. My work fell upon Sir Sandip Roy, and R Karthikeyan Sir, Senior Consultant.

First I prepared Representative Stratigraphic Sequence-Lithologs of borehole

data and prepared an outlay in Automatic Computer Aided Design (AutoCAD).

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Then, I did Nalegaon Merald Mine Geo referencing Borehole ( By placing the

Borehole data AutoCAD file and Rastor Image alongside of each other, one on

left and one on right, and then Rubber sheeting the Image Boreholes with the

actual Borehole Data from the file and linking it one by one.

Followed by the Digitisation of Floor contours (Light black), Fault lines (Dark

Black thick line), Incrop (Hatched Black), respective contour values (50, 60, etc).

Then, I worked with Prashant Sir on developing Perpendicular Projections of

Intersections of Sectional Lines and contours to help develop the Bench

Formation from contour lines in open cast Vijay iron ore mine.

19, May, Tuesday – 27, May, Thursday:

I prepared Representative Stratigraphic Sequence of borehole data as an outlay

in AutoCAD under the supervision of Sandip Sir.

Then, I did Nerad Malegaon Geo Referencing and Rubber sheeting with borehole

data.

Digitisation of the Floor contour Plan of the same.

I updated the Excel sheet, cross matched and edited the values for the missing

layers of different seams in the Chotia Block-I under Sripriya ma’am and did Bore

hole position data logging into excel sheet.

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Then, I worked on the Development of sections of Usha Martine Project

Also, the Literature review of 3D Slope Stability Analysis.

The following day,

We had our 2 Surpac classes which gave us an insight into the basics of Orebody

design, the file and attribute parameters, its significance and usage, together

with its application of Ms Excel into database, given by Prashant Sir.

I did Digitisation of whole Tasra SEAM FOLIO PLAN OF XIV/XIII in AutoCAD, right

from scratch, given by Sandip Sir.

We had a brief introductory class of Geophysics, its application in mining along

with different methods involved, used in this firm.

Then, we were also introduced to different types of Borehole logging methods

along with a presentation, and were shown some on field-used equipments used

by this firm.

We also learnt how to take readings in gravity-meter, along with is working

components.

28th May, Thursday – 3rd June, Wednesday:

We had a brief introduction to some more basic concepts of Geo-exploration as

done by Geological Survey of India, its history and significance, given by Dr.

Mukherjee.

Basic insight into Kolar gold field, and its development over the years.

I made a Litholog section of Chotia seam in AutoCAD under the supervision of

Sandip Sir.

We also attended the monthly presentation of ongoing projects in this firm.

We compiled the final Nerad Malegaon Mine closure plan into a doc file.

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I did digitization of different plates like IV A, IV B, and IV D of Nerad Malegaon

Mine seam plan.

4th June, Thursday – 29th June, Monday:

We had a brief introductory class of Global Mapper and its various functions and

applications in mining field, given by Mr. Sundar Raj. We were taught how to

make it applicable in contour design, aerial survey, calculation of area, creation

of demarcation line and usage in various other mining fields.

We were also given a lecture on the usage of ASTER global maps in Google Earth,

and Google Maps API key application.

We had a 1hr class conducted by Senior Mining Consultant Mr. Somnath Gain on

the Economics, geological and feasibility of resources, various resource reporting

majors in India, and brief introduction to United Nations Frame Consideration

(UNFC) consideration qualifications, the importance of QP and RQP, EFG rating

scale.

We had a 3hr Surpac class conducted by Senior Mining Consultant Mr. Mihir

Chandra which took us into the knowledge of Orebody modelling, database

formation and entry, and basics regarding it.

Along with these daily office hours, DMT had set specific hours allotted to Recreational Activities and weekly meetings that were held on the last day and the first day of the starting week, respectively. Recreational activities were based on showcase of presentation skills followed by progress report and office games. The Monday weekly meetings were aimed at discussion on ongoing weekly projects and progress in it. I presented on three topics viz. Business involved in coal Mining, Mars One Project, and TOR Network.

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Turamdih, Tatanagar, Jharkhand

Date of Visit: 24th June, 2015

Mentor: Mr. S.N Munsi (Senior Mining Engineer) along with Mr. Navneet Singh Tomar Sir (Mining Consultant)

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Uranium Corporation of India (UCIL) is a centrally owned Public Sector

Undertaking (PSU), under the Department of Atomic Energy. The corporation was

founded in 1967 and is responsible for the mining and milling of uranium ore in

India.

The firm operates mines at Jadugora, Bhatin, Narwapahar, Turamdih and

Banduhurang. Turamdih mine is located 24 km to the west of Jaduguda and 5 km

south to Tatanagar railway station. Turamdih Processing Plant has been set up to

treat the ore from Turamdih, Banduharang and Mohuldin mines.

o The deposit was discovered by AMD during 1969.

o UCIL had undertaken the construction of this mine in 1989.

o The mine opening was established and sufficient infrastructure was

developed for this purpose.

o The project was however shelved in 1992.

o The project was then formally inaugurated by Dr. Anil Kakodkar, Chairman,

and Atomic Energy Commission on November 9, 2002.

I. TURAMDIH MINE GENERAL INFORMATION

i. The ore body lies within the meta-sediments of Singhbhum Thrust

Belt and persists from surface up to a depth of 170m.

ii. Total lease area: 225.48 Hectares.

iii. Production: This mine produces 1000 tons/day of ore generating 300 tons/day of waste.

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iv. Assistant Manager : S.K Singh

v. Chief Geologist : Prashant Das

vi. General Manager : P. N Sarkar

II. ORE BODY DESCRIPTION

i. Total reserve = 7.6 million tons

ii. Exploration led to development to the depth of 265 m.

iii. Ore type: Uraninite

iv. Dip: General (22° – 40°, some places at 80°)

v. Strike : 73° 37’ 36” (South / East)

vi. Orebody: Thin Lenticular shape (in form of lens patches)

vii. Four lodes (L1… L4) in total.

viii. Cutoff Grade = 0.02%

ix. Lode 4 (Richest Grade) :

Strike length = 500m

Average width = 40m

Average Grade = 0.04 %

III. TIMELINE

i. Started: 1988/89 then stopped in 1992

ii. Re-started: 2002

iii. Total estimated life of mine: 25 Years

iv. Years left : Approx. 10 Years

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IV. MINERAL EXTRACTION (METHOD OF WORKING)

Method of Entry: 8° Decline (Horizontal distance 520m, Vertical

distance 70m). At a depth of 70m, the ore body will be accessed

from the decline by a cross-cut. Drives will be developed, following

the contacts of ore body. After 10m of excavation, pillars of 5m X

5m has been left of height 3.2m but latterly they can be increased

to 5m. Preferable stope length = 150-180 m

Vertical Shaft: To be opened in 3-4 months’ time.

o Type: Double Drum Cylindrical Winder

o Depth: 265m

o Motor: 536 HP, 400 kW, 720 rpm

o Diameter: 2600 mm (drum)

o Rope: 26 mm (dia), 400 m (length)

o Used as: Skip/Cage

Cut and fill with horizontal cutting leaving post pillars.

Ore is approached from the footwall at each level and then stope

drives and crosscuts are made for the purpose of stope

development.

Total there are 7 levels.

First level contains 60% of the total ore of the mine. It is 70 m down

from the surface.

Extraction is done in two steps:

o Extraction up to 3.2 m,

o Heightening up to 5 m.

Sump Location: Just near the entry at level 1.

Settling Tanks: 3 Tanks in total.

Pipelines: 3 (1 Thick for water, 2 Thin for electric cables).

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General Layout (Plan View)

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V. VENTILATION SYSTEM

Ventilation System: Ascentional ventilation

o Air enters through the drift and then it gets divided into two halves

when it enters the stope. Finally it escapes through raises at both

the ends

They get 170 cu. m/s of air from the decline and rest from shafts and other openings.

The Quantity of air that exits has a value of about 300 cu. m/s

10 cu.m. of air is received at the stope

The mine has two ventilation shafts at two extremes of the ore body with large exhaust fans permitting flow of adequate fresh air through the main shaft and decline.

Initially 50 HP fan is used for auxiliary ventilation till the raises are been made at both the ends of the drive.

VI. DRILLING AND BLASTING

Blast Pattern o Burn cut with 2 reamers(for creation of free face) o Fan cut (for slicing operation) o Other patterns: Pyramid cut and Wedge cut

Explosive: Packaged emulsion PG-801 o Cartridge Diameters = 25mm, 32mm, 40mm

VII. MATERIAL HANDLING

This ore will be brought to surface through the decline. Ore from deeper levels will be hoisted through the vertical shaft. They don’t use any chute. Instead directly transports with the help of truck (LDPT).

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VIII. VEHICLES

Electro Hydraulic Jumbo Drill Rimmer, Scissor Lift (Multi-purpose carrier ) 1

Operator, 1 helper, mainly used for roof dressing, Loader – Scoop tram,

Low Profile Dumper Trucks (LPDT) having 20 tons capacity, etc.

IX. ROOF CONTROL

Adequate measures of roof control will be done with state-of-the-art

support technique.

Partition between stopes is done by rib pillars support.

Rock bolts of 3m are used, using 20mm torsion steel. Bolting is done in

a grid of 1.2mx1.2m.

X. FILLING

• Filling with water and sand mixture of 3:2

• Decantation while barricading the access cross-cut

• Maximum filling height = 3m

XI. WASTE DUMPING

The waste rock generated from the mine will be disposed in a well-

designed dump yard within the mine premises.

XII. SAFETY & OTHER ASPECTS

Helmet, Boots, Ear plugs, Ear buds, Lamp with battery, whistle.

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XIII. SAFETY POLICY (UCIL)

UCIL is committed to high level of Occupational Health and Safety (OH&S)

to control radiations.

Ensures working, communication, understanding operations and

constructions as per the rules and regulations.

Proper amount of posters are displayed at various positions to ensure

safety in the mine.

XIV. SURFACE FEATURES

o Settling tank o Godown o Central store o Vehicle shop o Water tower o Canteen o Workshop

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The past months of my internship have been very instructive for me. DMT has offered me opportunities to learn and develop myself in many areas. A lot of the tasks and activities that I have worked on during my internship might help me with what I’m studying at the moment. I worked in many areas where I did different work. This gave me the chance to find out which areas I want work in after my education. The area that I found most interesting is Analysis or Mine planning and design using various mining software tools. As a bonus, I got to experience the company planning process. I learned how the marketing and planning activities occur. I also learned how the administrational process occurs by maintaining contact with the venue, vendors and sponsor partners. Before my internship started my ideas did not match the experiences have gained during my internship. There is a big difference in the school projects and the tasks and activities during the actual work. In school we learn how to describe the work in projects, where in work you learn how to implement them in reality. This internship was definitely an introduction to the actual work field for me. I have learned to work in a business organisation and apply my knowledge into practice.

My mentors during my internship were Navneet Sir and Sripriya Ma’am, both belonging to IIT BHU mining department, and I have also learned a lot from them during my internship. They were very helpful and always willing to give me advice and feedback which I appreciate. I have tried to learn as much as possible from them during my internship.

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I had fun too following my internship at DMT. Director and Managing director gave us a party treat during this stay, and were friendly and helping with all of us, the interns. The atmosphere in the office is commendably in good spirit and friendly, without a strict hierarchy system where one could not approach the director personally. The Birthdays are also celebrated with a cake ceremony which was good to see unlike in stressful time-packed management jobs.

RECOMMENDATIONS FOR THE INERNSHIP COMPANY

DMT is a great learning company for interns. It’s a company that helps interns

improve and develops their skills. I would recommend DMT to keep hiring interns

with different educational background, to help build and improve the company

with the knowledge they gained from their studies. And form a little more

cooperative time table for interns.