A.K.M. Fayazul Kabir | Memorial University of Newfoundland (original) (raw)
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Papers by A.K.M. Fayazul Kabir
Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths o... more Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths of 257m to 483m below the surface. Considering the Geological, Geo-environment and other related geoengineering information, underground mining have been selected there to extract the deposit. In this paper, our concern is about shaft sinking method for underground mining. Depths of the coal seams reveal the necessity of a vertical shaft underground which again needs deep excavation. The problem arises with the excavation because of nearly 138m thick Dupitila Sandstone Formation just 6m below the surface in the area. It is loose, water bearing, containing dominantly porous and permeable sandstone and experiences massive water flow. So, the major concern is that any excavation through this will readily collapse and suffer massive water inrush. This will totally disturb the whole mining work progression and cause economic loss as well. By analyzing the ground condition of the Khalashpir cola field, artificial ground freezing has been identified most appropriate as shaft sinking method to control the ground water and to stabilize the loose soil during excavation. Lawfulness of the method and reason of neglecting other two common shaft sinking methods has been pointed out in this paper.
Sand is a natural resource can be used as an engineering material which plays an important role i... more Sand is a natural resource can be used as an engineering material which plays an important role in engineering constructions. Generally sand is used as a fine aggregate in mortar, plaster, concrete and finishing works. It also used for filling under floor, basements. Sand should be pure silica (SiO2), but all types of sand are not suitable for such work.From this point of view, the present study assesses some engineering properties for understanding their suitability for construction works. The properties such as Fineness Modulus (FM), Specific Gravity, Silt & Clay content and Compressive Strength have been estimated in laboratory and the results revealed that the sand is best for mortar and concrete work and suitable for plastering and finishing work. Results also suggest that this sand can be used for filling up the roads and brick soling gap area.
Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths o... more Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths of 257m to 483m below the surface. Considering the Geological, Geo-environment and other related geoengineering information, underground mining have been selected there to extract the deposit. In this paper, our concern is about shaft sinking method for underground mining. Depths of the coal seams reveal the necessity of a vertical shaft underground which again needs deep excavation. The problem arises with the excavation because of nearly 138m thick Dupitila Sandstone Formation just 6m below the surface in the area. It is loose, water bearing, containing dominantly porous and permeable sandstone and experiences massive water flow. So, the major concern is that any excavation through this will readily collapse and suffer massive water inrush. This will totally disturb the whole mining work progression and cause economic loss as well. By analyzing the ground condition of the Khalashpir cola field, artificial ground freezing has been identified most appropriate as shaft sinking method to control the ground water and to stabilize the loose soil during excavation. Lawfulness of the method and reason of neglecting other two common shaft sinking methods has been pointed out in this paper.
Qualitative and quantitative analysis of Ganges river water along Rajshahi city reveals that huge... more Qualitative and quantitative analysis of Ganges river water along Rajshahi city reveals that huge amount of water available all the year round can be used for drinking purposes as well as household works with minor treatment for turbidity. Quality of the water samples collected in premonsoon and post-monsoon is within the World Health Organization (WHO) and Bangladesh National Standard. Sodium (Na) ranges from 0.058 to 0.095 mg/l, iron (Fe) 0.5 to 0.20 mg/l and total hardness from 0.32 to 0.22 mg/l. The other constituents like potassium (K), manganese (Mn), zinc (Zn) and bi-carbonates (HCO3), sulfates (SO4), chlorites (Cl) etc. are also found within the acceptable range. The water is slightly alkalic in nature (pH =8.35 to 8.6). The amount of turbidity (65 JTU to 270 JTU) is higher than the permissible range. This amount of turbidity should be reduced by Alum Dosaging method in order to use in household and drinking purposes. This sort of surface water utilization certainly reduces the extra pressure on groundwater withdrawal in densely populated urban areas.
Maddhapara Granite mine is the only Hardrock underground mine, which is contributing to infrastru... more Maddhapara Granite mine is the only Hardrock underground mine, which is contributing to infrastructure development of Bangladesh. It was established in 1995 by the North Korean contractor (NAMNAM).Over the past few years it was observed that in some of the vital area of the pit bottom, appears to be vulnerable, where needs to be taken special consideration to make sure the safe working environment for the miners and equipment machinery as well. The authors of this research have taken an attempt to identify and overcome such problem by a research program. In this research, our outcome has been established that the, optimum support have to be determined by using Rock Support Interaction Analysis for rock mass in production level. During design stage, it was considered that the total rock mass is intact (based on initial geological survey data), means there are no wedges along the opening. However a little amount of geological abnormality anticipated in the production level during construction phase. Due respect to that, our research recommended that, there has to be a little amount of support is needed for any kinds of openings in first category of rock, in second category it has to be considered by shotcreting of different thickness of lining in roof and the sidewall. In third category of rock, support system has to be considered by rock bolting and latter shotcrete the roof and side wall. Finally 2.3, 4.6 and 10.73 m openings in third category of rock there needs to be 0.0095m 0.015m and 0.026m fiber reinforced shotcrete and 3m bolt length and blot spacing with 1.5, 1, 0.95m respectively in roof and inside wall 0.006m, 0.015 and 0.045m shotcrete lining have to be considered for safe mining work.
The The Korea South-South Cooperation (NAMNAM) started to explore the Maddhapara Hardrock mine in... more The The Korea South-South Cooperation (NAMNAM) started to explore the Maddhapara Hardrock mine in 1994 within an area of 1.25 Km 2 and handed over it to Petrobangla. Petrobangla is planning now to extend the area of mine to fulfill the yearly production target 1.65 million tons. There are two shafts (skip & cage) at Maddhapara Hardrock mine and NAMNAM didn't propose any ventilation shaft for ventilation. But if the mine will go for targeted production then more air will be required for miners for a good working environment. This additional air can be ventilated though a ventilation shaft. The present study proposes a ventilation shaft that can be constructed by conventional freezing method.
Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths o... more Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths of 257m to 483m below the surface. Considering the Geological, Geo-environment and other related geoengineering information, underground mining have been selected there to extract the deposit. In this paper, our concern is about shaft sinking method for underground mining. Depths of the coal seams reveal the necessity of a vertical shaft underground which again needs deep excavation. The problem arises with the excavation because of nearly 138m thick Dupitila Sandstone Formation just 6m below the surface in the area. It is loose, water bearing, containing dominantly porous and permeable sandstone and experiences massive water flow. So, the major concern is that any excavation through this will readily collapse and suffer massive water inrush. This will totally disturb the whole mining work progression and cause economic loss as well. By analyzing the ground condition of the Khalashpir cola field, artificial ground freezing has been identified most appropriate as shaft sinking method to control the ground water and to stabilize the loose soil during excavation. Lawfulness of the method and reason of neglecting other two common shaft sinking methods has been pointed out in this paper.
Sand is a natural resource can be used as an engineering material which plays an important role i... more Sand is a natural resource can be used as an engineering material which plays an important role in engineering constructions. Generally sand is used as a fine aggregate in mortar, plaster, concrete and finishing works. It also used for filling under floor, basements. Sand should be pure silica (SiO2), but all types of sand are not suitable for such work.From this point of view, the present study assesses some engineering properties for understanding their suitability for construction works. The properties such as Fineness Modulus (FM), Specific Gravity, Silt & Clay content and Compressive Strength have been estimated in laboratory and the results revealed that the sand is best for mortar and concrete work and suitable for plastering and finishing work. Results also suggest that this sand can be used for filling up the roads and brick soling gap area.
Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths o... more Khalashpir coal field is the 3 rd largest coal field in Bangladesh, where coal occurs at depths of 257m to 483m below the surface. Considering the Geological, Geo-environment and other related geoengineering information, underground mining have been selected there to extract the deposit. In this paper, our concern is about shaft sinking method for underground mining. Depths of the coal seams reveal the necessity of a vertical shaft underground which again needs deep excavation. The problem arises with the excavation because of nearly 138m thick Dupitila Sandstone Formation just 6m below the surface in the area. It is loose, water bearing, containing dominantly porous and permeable sandstone and experiences massive water flow. So, the major concern is that any excavation through this will readily collapse and suffer massive water inrush. This will totally disturb the whole mining work progression and cause economic loss as well. By analyzing the ground condition of the Khalashpir cola field, artificial ground freezing has been identified most appropriate as shaft sinking method to control the ground water and to stabilize the loose soil during excavation. Lawfulness of the method and reason of neglecting other two common shaft sinking methods has been pointed out in this paper.
Qualitative and quantitative analysis of Ganges river water along Rajshahi city reveals that huge... more Qualitative and quantitative analysis of Ganges river water along Rajshahi city reveals that huge amount of water available all the year round can be used for drinking purposes as well as household works with minor treatment for turbidity. Quality of the water samples collected in premonsoon and post-monsoon is within the World Health Organization (WHO) and Bangladesh National Standard. Sodium (Na) ranges from 0.058 to 0.095 mg/l, iron (Fe) 0.5 to 0.20 mg/l and total hardness from 0.32 to 0.22 mg/l. The other constituents like potassium (K), manganese (Mn), zinc (Zn) and bi-carbonates (HCO3), sulfates (SO4), chlorites (Cl) etc. are also found within the acceptable range. The water is slightly alkalic in nature (pH =8.35 to 8.6). The amount of turbidity (65 JTU to 270 JTU) is higher than the permissible range. This amount of turbidity should be reduced by Alum Dosaging method in order to use in household and drinking purposes. This sort of surface water utilization certainly reduces the extra pressure on groundwater withdrawal in densely populated urban areas.
Maddhapara Granite mine is the only Hardrock underground mine, which is contributing to infrastru... more Maddhapara Granite mine is the only Hardrock underground mine, which is contributing to infrastructure development of Bangladesh. It was established in 1995 by the North Korean contractor (NAMNAM).Over the past few years it was observed that in some of the vital area of the pit bottom, appears to be vulnerable, where needs to be taken special consideration to make sure the safe working environment for the miners and equipment machinery as well. The authors of this research have taken an attempt to identify and overcome such problem by a research program. In this research, our outcome has been established that the, optimum support have to be determined by using Rock Support Interaction Analysis for rock mass in production level. During design stage, it was considered that the total rock mass is intact (based on initial geological survey data), means there are no wedges along the opening. However a little amount of geological abnormality anticipated in the production level during construction phase. Due respect to that, our research recommended that, there has to be a little amount of support is needed for any kinds of openings in first category of rock, in second category it has to be considered by shotcreting of different thickness of lining in roof and the sidewall. In third category of rock, support system has to be considered by rock bolting and latter shotcrete the roof and side wall. Finally 2.3, 4.6 and 10.73 m openings in third category of rock there needs to be 0.0095m 0.015m and 0.026m fiber reinforced shotcrete and 3m bolt length and blot spacing with 1.5, 1, 0.95m respectively in roof and inside wall 0.006m, 0.015 and 0.045m shotcrete lining have to be considered for safe mining work.
The The Korea South-South Cooperation (NAMNAM) started to explore the Maddhapara Hardrock mine in... more The The Korea South-South Cooperation (NAMNAM) started to explore the Maddhapara Hardrock mine in 1994 within an area of 1.25 Km 2 and handed over it to Petrobangla. Petrobangla is planning now to extend the area of mine to fulfill the yearly production target 1.65 million tons. There are two shafts (skip & cage) at Maddhapara Hardrock mine and NAMNAM didn't propose any ventilation shaft for ventilation. But if the mine will go for targeted production then more air will be required for miners for a good working environment. This additional air can be ventilated though a ventilation shaft. The present study proposes a ventilation shaft that can be constructed by conventional freezing method.