Non-renewable resources in Bangladesh
#Non-Renewable Resources in Bangladesh
#Part-5
#Part-5
#coal is a combustible black or brownish-black sedimentary rock composed of lithified plant material.
#formation 200-300 million years ago in Permian Period.
#formation 200-300 million years ago in Permian Period.
#Gondwana coal: The coal is called Gondwana coal because these were formed within a vast super continent known as #Gondwanaland that existed at that time. #Age 345-280 MYA.
#coalmines
There are five coal fields in Bangladesh including Jamalganj (1962), Barapukuria (1985), Khalasphir (1989), Dhighipara (1995) and Phulbari (1997) with total reserved 3556 million metric tons.
There are five coal fields in Bangladesh including Jamalganj (1962), Barapukuria (1985), Khalasphir (1989), Dhighipara (1995) and Phulbari (1997) with total reserved 3556 million metric tons.
#Coal rank and quality
Three types of coal have found in Bangladesh such as Bituminous, lignite and peat. One of them bituminous coal possess high quality compared to the other country which has carbon (56.47%), volatile matter (28.70+- 1.31), calorific value 6673 Btu/lb and sulphur (0.67%) that is less inimical for environment.
Three types of coal have found in Bangladesh such as Bituminous, lignite and peat. One of them bituminous coal possess high quality compared to the other country which has carbon (56.47%), volatile matter (28.70+- 1.31), calorific value 6673 Btu/lb and sulphur (0.67%) that is less inimical for environment.
#Barapukuriya coal field
Barapukuria coal mine is the only active mine in Bangladesh which is initiated its production in 2005.
#Geologic structure: Located in Rangpur saddle of stable platform.
#Fault: Half graben type asymmetric cratonic basin bounded by eastern boundary fault.
#Coal bearing rock: Sedimentary rock lies on Precambrian crystalline (granitic) basement.
#Coal quality: low sulphur, high volatile bituminous coal with calorific value 10450 Btu/lb
#Mining method:
1. #Underground longwall mining method: it is the form of underground coal mining method where a long wall of coal is mined in a single slice. The longwall panel (block) is 3-4km long and 250-400m wide. It works effectively in seams up to 3m thick.
2. #Multi-slice mining method: When the thickness of coal seams is more than 3m, multi-slice longwall mining are applied. In Barapukuria, the thickness of coal seam ranges from 28-42m which is regarded as ultra-thick coal seam. In this plan to would be 4-6 slice where each slice remains 2-3m thick. These slice would be separated vertically from the next one by the section of unworked coal of around 3m.
Barapukuria coal mine is the only active mine in Bangladesh which is initiated its production in 2005.
#Geologic structure: Located in Rangpur saddle of stable platform.
#Fault: Half graben type asymmetric cratonic basin bounded by eastern boundary fault.
#Coal bearing rock: Sedimentary rock lies on Precambrian crystalline (granitic) basement.
#Coal quality: low sulphur, high volatile bituminous coal with calorific value 10450 Btu/lb
#Mining method:
1. #Underground longwall mining method: it is the form of underground coal mining method where a long wall of coal is mined in a single slice. The longwall panel (block) is 3-4km long and 250-400m wide. It works effectively in seams up to 3m thick.
2. #Multi-slice mining method: When the thickness of coal seams is more than 3m, multi-slice longwall mining are applied. In Barapukuria, the thickness of coal seam ranges from 28-42m which is regarded as ultra-thick coal seam. In this plan to would be 4-6 slice where each slice remains 2-3m thick. These slice would be separated vertically from the next one by the section of unworked coal of around 3m.
#Use: Mainly power generation (65%), Brick fields (35%) and other industrial and private users.
#To be continued......
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