2. • Coal Is Readily Combustible
Sedimentary Rock Composed
Essentially Of lithified plant
materials. More Specially it is a
readily combustible rock
containing more than 70% by
volume of organic materials
formed from induration of plant
remains .
COAL
3. • Peat is a heterogeneous
mixture of more or less
decomposed plant
materials that has
accumulated in a water
saturated environment
and in the absence of
Oxygen.
• Peat is the first stage of
coal formation.
• Consisting of volatile
material and water .
PEAT
4. Peat Coal
1.Less fixed
Carbon.
1.More Fixed
Carbon.
2.Produce less
heat.
2.Produce more
heat.
3.Emiting more
smog.
3.Emiting less
smog.
4.Less
compacted.
4.More
Compacted.
DIFFERENCE BETWEEN PEAT AND COAL
6. • The process of decomposition and shallow burial of vegetable materials lead to the formation
of peat which is precursor of all coal . As the coalification of peat proceeds with increasing
burial , progressively higher ranking coal is generated .
RANKS OF COAL
7. • Lignite Or Brown Coal :
Lignite coal is known as brown
coal for its deep brown or
blackish brown color . It is harder
than peat ,fibrous ,has a layered
structure and may contain
fragment of wood. The calorific
Values Range 5,800-
7,000btu/lb (3,190-3,850kcal/Kg).
CLASSIFICATION OF COAL
8. • Sub bituminous Coal : It is
also brown coal this covers the
rank between brown woody lignite
and bituminous coal . It shows
little woody materials . it is
moderate infixed carbon and often
higher in volatile matter .The
calorific Values Range 8,500-
10,500btu/lb (4,675-
5,775kcal/Kg).
CLASSIFICATION OF COAL
9. • Bituminous coal : It is dark
gray to black, shiny, hard ,brittle
and denser than lignite and sub-
bituminous coal. It has low
moisture, moderate volatiles and
high fixed Carbon. The calorific
Values Range 12,000-15,000
Btu/lb (6,600-8,250kcal/kg).
CLASSIFICATION OF COAL
10. • Anthracite Coal : This is
hardest of all coal and has jet
black, and dull to brilliant or sub-
metallic luster. It has low moisture,
lowest volatiles and highest fixed
Carbon. The calorific Values Range
14,000-15,000Btu/lb (7,700-
8,250kcal/kg).
CLASSIFICATION OF COAL
14. • Jamalganj coal field is
located in Jaipurhat district
in the vicinity of Jamalganj
town. The field is
discovered in 1962.. The
total reserve of coal in the
field is estimated at 1,053
million tons. This is the
largest coalfield so far
found in bangladesh.
JAMALGANJ COAL FIELD
15. The nine bore holes that penetrated the coal seams are spread
over an area heaving a maximum east-west distance of 12.5 km and
a north south distance of 4.8 km.
Jamalganj coal is a high volatile bituminous coal and has an
average calorific value of 12,100 BTU/lb. it is a good quality
Gondwana coal with little Sulphur content. proximate analysis
indicates that it has 33-54% (average 47%) fixed carbon, 30-40%
volatile matter, 10-60% (average 22%) ash and an average of 0.65%
Sulphur.
JAMALGANJ COAL STATE & VALUE
16. THICKNESS OF COAL SEAMS IN
VARIOUS WELL
Thickness of Coal seam in Jamalganj.
17. JAMALGANJ COAL FIELD GEOLOGICAL
STRUCTURE
Structural Feature of Jamalganj Coal Seam
• Coal occurs in a typical
half-graben basin within
the Precambrian
crystalline basement.
The basin is bounded to
the north by an east west
trending major fault
known as Buzrak-
Durgadah boundary
fault. The coal beds has
been affected by several
18. COAL SEAMS DEPTH AND THICKNESS
• There are 7(VII) coal seams in the Jamalganj
coal field within the Gondwana rock unit .The
seams are designed from top downward ,as
seam I, II, III, IV, V, VI and VII. The shallowest
coal seam occurs at depth of 614m below the
surface. These occur 119-512 m below the base
of tertiary unconformity .The depth of the thickest
and most well developed coal seam (iii)as
recorded in different wells ,ranges from 659m
(EDH-9) to 1032m(edh-14) below surface .The
deepest coal seam VII has a recorded depth of
1013 m (EDH-7) to 1124m(edh-10) below the
20. COAL BED METHANE (CBM) PROSPECT
IN JAMALGANJ COAL FIELD
• In assessing the prospectivity of CBM development, the following are
among the important factors to be considered: methane content of
coal; coal rank; coal permeability; thickness of coal seams; and depth
of burial of coal. Generally, high rank coal with thickness in excess of
30 m, burial depth of more than 600 m, gas content of 6 to 7 m3/ton,
permeability greater than 1.5 md, and an in-situ reserve of more than 1
billion tons of coal is considered reasonably viable for developing CBM
prospect in a gondwana coal basin [15]. With the background
information on the geologic occurrence of jamalganj coal described in
the previous section, this may now be assessed as to its CBM
prospectivity
21. • The positive factors for Jamalganj Coal Bed Methane development
include large coal reserves, above-average thickness of the coal
seams, suitable burial depths of coal seams, indication of significant
gas content, and also the low permeability of the rocks above and
surrounding the coal-bearing layers. The main advantage of
Jamalganj coal as a CBM prospect is a high net coal thickness and
the presence of at least one very thick seam (seam III). Seam III can
certainly be a primary target for CBM development, especially where
it combines with seam IV.
JAMALGANJ COAL FIELD POSITIVE
FACTOR
23. • M. Badrul Imam Sir, Energy Resources of Bangladesh .
• Wikipedia/Non renewable
• Wikipedia/Jamalganj Coal mining field Bangladesh .
• http;//www.academia.edu/405676/coalbed_methane prospect of Jamalganj.
• M.B. Imam, mineral resources of bangladesh. Dhaka, bangladesh: university press ltd., 1997, 169pp (in bengali).
• enewable energy S. Holloway and H.E. Baily, “coal bed methane pre-feasibility study — NW bangladesh”, technical report
wc/95/59 R,
british geological survey, overseas geology series, 1995, 65pp.
R.R. Rahman and M.A. Zaher, “jamalganj coal — its quality, quantity and mineability”, petroleum and mineral resources of
• Bangladesh. Seminar and exhibition, 8–12 october, 1980. Dhaka: govt. Of the people’s republic of bangladesh, 1980,
pp. 41–53.
• M. Friederich, “jamalganj coal bed methane, bangladesh — literature review”, unpublished BHP report, 1992, 39pp.
• D.D. Sharma, “geologic assessment of coal bed methane potential in india”, the 11th offshore south asian conference,
singapore, 24–27 september 1996, pp. 11–48
REFERENCES
24. How can we explore our
natural resources, think
or design yourself ?
