Coal mining impacts on water environs around the Barapukuria coal mining area, Dinajpur, Bangladesh

Howladar, M. Farhad

doi:10.1007/s12665-012-2117-x

Cited by 77 publications

(45 citation statements)

References 16 publications

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“…As the shields (hydraulic supports) move, the mine roof behind them continues to cantilever and caves into the mine void, which experiences the process of elastic deformation, plastic deformation, and failure [16,20], producing two types of tensile fractures at the surface over the panel: static tensile fracture above the side of a panel and dynamic tensile fractures that follow behind the advancing face [16,17]. The dynamic tensile fractures close as a result of compressional stress after the advance of the face, and static tensile fractures remain open for several months after mining [17], Currently, a variety of methods, ranging from analytical methods and field experiments to numerical and physical simulation, have been used that mainly focus on the mining-induced effects on the movement of overburden strata, the generation of fractures, and subsidence [2,13,29,30,[45][46][47]. However, very few detailed studies of the caving mechanism of overburden strata have been reported.…”

Section: Fractures Changes Due To Longwall Miningmentioning

confidence: 99%

“…Severe conflicts of interest are especially noteworthy regarding human life and the exploitation of energy resources [12][13][14][15][16][17][18][19][20][21][22][23][24]. Exploitation activities inevitably cause ground subsidence, water loss, building damage, and a series of other problems, especially in some eco-environmental fragile areas [3,[25][26][27][28][29][30][31][32][33][34][35].…”

Section: Introductionmentioning

confidence: 99%

“…The redistribution of the overburden stress regime caused by longwall mining brings about general increases in fracture porosity and permeability owing to the development of fractures, joints, and bedding separations, resulting in the disruption of the natural groundwater flow system to a great extent [12,15,16,44]. Currently, a variety of methods, ranging from analytical methods and field experiments to numerical and physical simulation, have been used that mainly focus on the mining-induced effects on the movement of overburden strata, the generation of fractures, and subsidence [2,13,29,30,[45][46][47]. However, very few detailed studies of the caving mechanism of overburden strata have been reported.…”

Section: Introductionmentioning

confidence: 99%

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A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining

Peng

Xiang

et al. 2017

Energies

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Abstract:The broken pattern of the overburden strata induced by mining has a non-ignorable effect on overlying strata movement, failure, and safety in mining production. To study the caving pattern of overlying strata and determine the calculation method of fracture pathway parameters due to roof caving induced by coal mining, the trapezoidal broken models were developed to explain and prevent water leakage, and even water inrush, during the mining process. By incorporating the variation of the volume expansion coefficient, a connection among the parameters of the fracture pathways and fracture angles, face width, and mining height could be established, which shows that the larger the degree of the fracture angle is, the smaller the value of the volume expansion coefficient and face width is with a relatively larger mining height. This relationship was also used to determine the eventual evolution configuration of the trapezoidal broken model. The presented approaches may help us to better understand the movement of overburden strata and provide an idea to help settle conflicts related to fracture space calculations induced by coal mining.

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Section: Fractures Changes Due To Longwall Miningmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining

Peng

Xiang

et al. 2017

Energies

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“…Currently, Chinese coal industry occupies more than one-third of global coal production with annual production up to about 3.5-4 billion tons, in which at least 2.5 billion tons coming from underground mining. However, together with the high-intensity exploitation of coal resource, a series of problems concerning environment, ecological, and geological destructions and damage have inevitably occurred [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

“…Research and application of backfilling technologies in metallic and non-metallic mines has made considerable progress, including dry material backfilling, water-sand backfilling, pneumatic backfilling, paste cemented backfilling, full tailings backfilling, etc. [2,6,8,9]. Actually, these methods were developed based on the conditions of metal mines, which are inappropriate for coal mining working faces, since in metal-deposit mines, ore seams are mined with room and pillar methods.…”

Section: Introductionmentioning

confidence: 99%

Green and Sustainable Mining: Underground Coal Mine Fully Mechanized Solid Dense Stowing-Mining Method

et al. 2017

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China produces and consumes most of coal in the world. This situation is expected to continue within a certain period in the future. Currently, Chinese coal industry is confronted with several serious problems relating to land resource, water resource, environmental, and ecological sustainability. Coal resource exploitation causes the permanent fracture and movement of strata structure, which have caused the fracture and collapse of overlying strata and further led to the subsidence of ground surface as well as the seepage of water in aquifers around the coal seam, which has resulted not only in the loss of land and water resources, but also in serious threats and accidents to underground mining. On the other hand, mining and mineral-processing wastes are one of the world's long plagued concerns among solid wastes. Coal gangue, as the major waste with a huge amount of discharge, has not only occupied the land, but has also contaminated the ambient land resources and hydrological environment, and further led to ecological system destruction and degradation. What is more, in China there are large amounts of coal-located under railways, buildings, and water bodies-which are unavailable with traditional mining methods. These problems are obviously threaten the concept of green sustainable development. This paper introduces a novel developed solid dense stowing mining method, which is able to significantly reduce or event eliminate the corresponding damages caused by underground mining behavior and realize green and sustainable development. The novelty of this research work is realizing the automation and synchronization of mining and material stowing with an appropriate compaction ratio for adequate support of goaf roof. It can improve the stability of rock strata and the safety and efficiency of underground mining. We also studied and designed a perfect stowing material by using coal gangue and fly ash with appropriate proportions under different particle size gradations. By implementation of the above-mentioned methods in China, the solid dense stowing rate of mined seam areas have reached more than 95% and the overburden strata movements have been reduced to extremely low level which had nearly no damages to above buildings. The solid dense stowing mining method has also realized the reuse and recycling of coal mine solid wastes. Meanwhile, considerable previously unavailable coal resources under buildings, railways, and water bodies have been made available for exploration, which could extend the life of coal mines and increase the sustainability for coal industry and the environment. Ultimately, this method is a reliable way to realize green and sustainable mining. The strata structure protection, the surface subsidence prevention, and coal mine solid waste disposal have been realized at the same time.

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Environmental Impacts of Coal-Mining and Coal-Fired Power-Plant Activities in a Developing Country with Global Context

Habib¹,

Khan

2021

Environmental Challenges and Solutions

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To represent a comprehensive scenario regarding the coal mining and coal-fired power plant activities in a developing country (Bangladesh) and to understand the total environmental impacts, potential coal resources of Bangladesh, environmental geochemistry and dispersion of pollutants, eco-toxicological impacts, human health risks as well as socioeconomic impacts are evaluated in this chapter. Potential coal reserves along with the future plants are estimated. Technogenic sources of environmental pollutants including environmentally toxic heavy metals, health hazardous radionuclides, persistent organic pollutants, suspended particulate maters, etc. are assessed. In doing so, scarce associated data from coal mine (Barapukuria, Bangladesh) and Barapukuria coal-fired power plant (BTPP) of Bangladesh have been reconciled by using and arguing the previous works around the globe. Immense and proper literature reviews as well as the existing data on Barapukuria coal mine and BTPP are tabulated to compare and understand the condition along with the potential prevention and remediation approaches.

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Coal mining impacts on water environs around the Barapukuria coal mining area, Dinajpur, Bangladesh

Cited by 77 publications

References 16 publications

A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining

A Novel Caving Model of Overburden Strata Movement Induced by Coal Mining

Green and Sustainable Mining: Underground Coal Mine Fully Mechanized Solid Dense Stowing-Mining Method

Environmental Impacts of Coal-Mining and Coal-Fired Power-Plant Activities in a Developing Country with Global Context

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