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Journal articles on the topic 'Coal dewatering'

Author: Grafiati

Published: 4 June 2021

Last updated: 8 February 2022

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1

Шкоп, Андрей Александрович. "Dewatering coal polydisperse suspensions." Eastern-European Journal of Enterprise Technologies 2, no. 6(74) (April 20, 2015): 44. http://dx.doi.org/10.15587/1729-4061.2015.40557.

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2

Liu, Bing Tao, Yi Ming Liu, and Li Min Zhao. "Study on Fly Ash for Conditioning of Specific Resistance of Sludge Water." Advanced Materials Research 955-959 (June 2014): 3318–22. http://dx.doi.org/10.4028/www.scientific.net/amr.955-959.3318.

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Effect of the dosage of flocculants on sludge dewatering is analyzed through the determination of sludge specific resistance to filtration. Sludge dewatering behaviors conditioned on Polymeric aluminum, PAM, fly ash and composite flocculants have been compared. The results show all the conditioning agent have help to sludge dewatering. Fly ash from electric power plant as conditioning agent can greatly reduce the specific resistance of sludge and the dewatering performance can be improved.The optimal dosage of fine powdered coal is 20g/100mL and coarse powdered coal is 30g/100mL.Powdered coal is mixed with sludge to form filter cake which is blended with coal in certain proportion to make into fuel.

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3

Sumer, S. M., J. J. Elton, and J. A. Tapics. "Dewatering optimization using a groundwater flow model at the Whitewood open-pit coal mine, Alberta." Canadian Geotechnical Journal 25, no. 4 (November 1, 1988): 684–93. http://dx.doi.org/10.1139/t88-079.

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By 1980, coal production and coal recovery at the Whitewood mine, Alberta, were unacceptably low as a result of poor groundwater and surface water control at the mine. A feasibility study conducted to determine the most cost-effective method to reduce groundwater inflows into the mine pit and reduce pore-water pressures in the mine walls concluded that a vertical well dewatering system, which would be located behind the highwall, was the most suitable. A finite difference computer model was constructed and successfully applied to design the dewatering system. The flexibility and ease of application of the model made it possible to determine the optimum number, production schedules, and locations of the dewatering wells, in conjunction with evolving mine plans. The implementation of the dewatering well program and improvements in surface water and in-pit drainage have resulted in increased coal recovery, a significant decrease in mine wall failures, and improved coal quality. Key words: dewatering, modelling, groundwater, open-pit mining, hydrogeology, pumping wells, optimization, monitoring, coal recovery.

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4

Burat, Firat, Ayhan A. Sirkeci, and Güven Önal. "Improved Fine Coal Dewatering by Ultrasonic Pretreatment and Dewatering Aids." Mineral Processing and Extractive Metallurgy Review 36, no. 2 (September 25, 2014): 129–35. http://dx.doi.org/10.1080/08827508.2014.898637.

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5

Tyulenev, Maxim, Sergey Markov, Sergey Kravchenko, and Stefan Vöth. "Study of slurry dewatering in a horizontally placed shell filtering construction." E3S Web of Conferences 303 (2021): 01052. http://dx.doi.org/10.1051/e3sconf/202130301052.

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Dewatering of water-coal slurry or thickened product under conditions of operating SUEK-Kuzbass JSC enrichment plants is a promising direction of obtaining technogenic mineral resources. It should also be noted that the quality of the obtained product will be directly influenced by the quality of the initial raw materials. If the content of carbon particles is high and the average ash content of the solid phase is low, such a slurry will be of interest in terms of obtaining additional volumes of coal after dewatering. The object of this study is water-coal slurry obtained at the outlet of the radial thickener (thickened product). The subject of the research is technology of thickened product dewatering with the use of shell filter constructions. The aim of the work is to develop and substantiate parameters of low-cost technology of thickened product dewatering to ensure an increase in economic and environmental efficiency of mining operations. The idea of the work is to use the laws of mass transfer of suspended particles of water-coal slurry by filtering through specially made shell filter constructions (SFC).

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6

Lu, Xiuqin, Zhiqi Wu, Xuefei Li, Chen Zhang, Ning Wang, Mulian Huang, Zhengshuai Liu, and Yidong Cai. "Novel method for optimizing the dewatering rate of a coal-bed methane well." Energy Exploration & Exploitation 38, no. 4 (January 5, 2020): 1099–117. http://dx.doi.org/10.1177/0144598719898537.

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The reasonable dewatering rate in the single-phase water flow plays an essential role in pressure propagation and coal-bed methane production. However, current fluid velocity sensitivity experiments cannot provide an optimum dewatering rate for field coal-bed methane production. This study proposes a new method to optimize the dewatering rate for coal-bed methane wells by assuming the investigation distance reaches the well boundary when the bottom hole pressure declines to the critical desorption pressure. The effect of the stress sensitivity and fluid velocity sensitivity on pressure propagation was first simulated with COMSOL Multiphysics software. The results showed that the expansion area considering the stress sensitivity is shorter than that neglecting the stress sensitivity when the bottom hole pressure reached to the critical desorption pressure at 200 days. The expansion area with high dewatering rate will be shorter about 35 m than that with low dewatering rate at 200 days. The relationship between the maximum investigation distance and required time was established to optimize the dewatering rate by combining the pressure profile considering the influence of stress sensitivity with material balance equation. The new model indicates that the initial permeability, porosity, and cleat compressibility have an important effect on investigation distance. The simulation of these parameters’ sensitivity suggests that the bigger the ratio of initial permeability and porosity, the longer the investigation distance is, and the smaller the cleat compressibility is, the longer the expansion area is. According to this model, we need to take more than 600 days at 0.58 m/d constant dewatering rate to reach the maximum investigation distance of 0.67 mD initial permeability. This work can be conducive to choose reasonable dewatering rate in single-phase water flow for coal-bed methane well production.

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7

Le Roux, M., Q. P. Campbell, and M. J. Van Rensburg. "Fine Coal Dewatering Using High Airflow." International Journal of Coal Preparation and Utilization 34, no. 3-4 (April 16, 2014): 220–27. http://dx.doi.org/10.1080/19392699.2014.869939.

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8

Miura, Kouichi, Kazuhiro Mae, Ryuichi Ashida, Tomoichiro Tamura, and Takayuki Ihara. "Dewatering of coal through solvent extraction." Fuel 81, no. 11-12 (July 2002): 1417–22. http://dx.doi.org/10.1016/s0016-2361(02)00059-5.

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9

., Sonali Samanta. "ELECTRO-OSMOSIS DEWATERING OF COAL SLUDGE." International Journal of Research in Engineering and Technology 05, no. 13 (January 25, 2016): 84–87. http://dx.doi.org/10.15623/ijret.2016.0513015.

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10

Kalashnikov, Valentin, Anton Gorbachev, and Zuzana Šimková. "Experimental Study of the Coal Slurry Dewatering." E3S Web of Conferences 174 (2020): 02022. http://dx.doi.org/10.1051/e3sconf/202017402022.

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Currently, over 50% of Russia’s coal is mined in Kuzbass region. This is the reason for extreme pressure on natural resources and ecology in the region. At present, more than 100 coal mines and open-pit mines, as well as 54 concentrating plants and facilities are operating in Kuzbass. Wastewater and wastes of concentration plants, which used sludge collectors, contain significant amounts of coal slurry in the form of finely dispersed particles. Filtered cake as a potential raw material is of interest from an economic point of view. This technogenic raw material is a waste of mining production in fact. At the same time, the high humidity, and the complexity of loading and transportation, and the lack of compliance with consumer requirements does not allow full using of this raw material. This article presents some results of experimental research on coal sludge dewatering using geosynthetic materials. The received experimental data allow making the preliminary forecast about possibility of use of geotextile- like materials for coal slurry dewatering with its potential further use.

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11

Dong, Xian Shu, Lai Hong Feng, Su Ling Yao, and Dong Fang Niu. "Study on Dewatering of Fine Coal by Combination of Electrolysis and Filtration." Advanced Materials Research 236-238 (May 2011): 622–26. http://dx.doi.org/10.4028/www.scientific.net/amr.236-238.622.

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With enhanced awareness of energy conservation and environmental protection, more attention has been paid to the high moisture content of the filtration products used in the flotation process as commonly employed in coal preparation plants. In this paper, we choose fine coal (–0.5mm) samples obtained from the Xiqu Coal Preparation Plant in China as our research objective. Tests were performed under three different experimental conditions: direct pressure filtration, electrolysis pressure filtration, and electricity decompression filtration with different electrodes. Thus our aim was the evaluation of the impact of electrodes on the electrolysis-pressure-filtration effect on fine coal dewatering. The results of this study indicate that when the coal slurry concentration is 400g/L, and when the electrode is aluminum-aluminum (90V, 14min), we can achieve the best effect and the lowest moisture content of the filter cake, which is 10%. The electrolysis pressure filter has a high dewatering efficiency, an advanced technical index, requires little power consumption (obviously energy-saving), needs only a small amount of maintenance, and is stable and reliable in operation, Thus the electrolysis pressure filter is the most effective and economical processing equipment for fine coal dewatering and has prospects for broad application.

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12

Kozlov, V. А. "SMALL SIZE COAL AND COAL SLURRY DEWATERING IN FILTRATION CENTRIFUGES." Ugol’, no. 05 (May 8, 2016): 91–93. http://dx.doi.org/10.18796/0041-5790-2016-5-91-93.

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13

Du, Mingze, Yanchun Xu, Heng Duan, and Wen Li. "The Stability Evaluation of Shaft during Drastic Drawdown Dewatering of Alluvium." Shock and Vibration 2019 (October 30, 2019): 1–14. http://dx.doi.org/10.1155/2019/3090439.

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The hydrophobicity of the aquifer at the bottom of the porous alluvium will affect the stability of the shaft. According to the changes of water level and the compressive amount of alluvium, we can evaluate the shaft stability and predict the shaft failure. In this work, the simulation model of the auxiliary shaft in the Zhuxianzhuang Coal Mine is generated by using the Nsdc software to evaluate the stability of the shaft during drastic drawdown dewatering. Based on the measured hydrophobic compression ratio in an adjacent coal mine, the compressive amounts of the strata near the main and auxiliary shafts in the Zhuxianzhuang Coal Mine are predicted under the condition of drastic drawdown dewatering, which will be 249.69 mm and 302.75 mm, respectively. It is more likely that the shaft wall may fracture in the 15th day (fourth load level) under the condition of drastic drawdown dewatering. The formation compressive amount near the auxiliary shaft is approximately 320 mm, which is close to the measured predicted value. At the same time, the Fisher discriminant model is established, and it is predicted that the state of the main and auxiliary shafts will be failure under the conditions of drastic drawdown dewatering in the Zhuxianzhuang Coal Mine. Based on the simulating results, the technical means of using the ground grouting for early prevention and control is proposed.

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14

Asmatulu, Ramazan, Gerald H. Luttrell, and Roe-Hoan Yoon. "Dewatering of Fine Coal Using Hyperbaric Centrifugation." Coal Preparation 25, no. 3 (July 2005): 117–27. http://dx.doi.org/10.1080/07349340590962766.

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15

LOCKHART, N. C., and C. J. VEAL. "Coal Dewatering: Australian R&D Trends." Coal Preparation 17, no. 1-2 (January 1996): 5–24. http://dx.doi.org/10.1080/07349349608905254.

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16

Yun, Sei-Hun, Chul Kim, Yeong-Cheol Kim, and Euy Soo Lee. "Dewatering of Coal Tar by Heat Treatment." Energy & Fuels 13, no. 2 (March 1999): 459–64. http://dx.doi.org/10.1021/ef980155g.

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17

Gehrke, Stevin H., Lii-Hurng Lyu, and Kristopher Barnthouse. "Dewatering Fine Coal Slurries by Gel Extraction." Separation Science and Technology 33, no. 10 (January 1998): 1467–85. http://dx.doi.org/10.1080/01496399808545061.

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18

Mohanty, Manoj K. "Screen Bowl Centrifuge Dewatering Process: A Parameteric Study." Physical Separation in Science and Engineering 2007 (July 12, 2007): 1–9. http://dx.doi.org/10.1155/2007/70376.

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Screen bowl centrifugation process is widely used for fine coal dewatering due to its relatively low cost, high capacity of providing low-moisture content product as well as relative ease of operation and maintenance. However, screen bowl centrifuge tends to lose a significant amount of ultrafine clean coal to the main effluent and screen-drain streams. This study aims at obtaining a better understanding of the parameter main effects and interaction effects with an ultimate goal of improving the dewatering performance of a screen bowl centrifuge. A three-level factorial experimental design has been utilized to conduct a test program using a continuously operated screen bowl centrifuge having a bowl diameter of 0.5 meter. The results of this study indicate that moisture content of the clean coal product is affected by both feed solid content and the pool depth maintained in the centrifuge. On the other hand, clean coal recovery to the product launder was found to be a function of feed solid content and volumetric feed flow rate but independent of the pool depth. The interaction effect of feed flow rate and feed solid content also appeared to have a significant effect on the clean coal recovery.

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19

Mikita, Viktória, and Balázs Kovács. "Numerical analysis of effects of an open-pit coal mine to groundwater." International Journal of Engineering and Management Sciences 4, no. 2 (June 6, 2019): 70–74. http://dx.doi.org/10.21791/ijems.2019.2.8.

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In this study we investigated the hydrogeological problems of an open-pit brown coal mine in the Borsod coal basin with Processing Modflow software. The coal mine is located in the valley of the Sajó-river with high transmissivity overburden layer where the traditional dewatering solutions were not encouraging due to inrush risks and low cost-efficiency. A new way of barrier forming was found out and numerically simulated to prove the efficiency of the solution. Since there are several contaminated sites in the surroundings it was a key factor to assure that the new mine dewatering technique has only a negligible effect on the groundwater regime that undisturbs the known contaminant plumes nearby.

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20

Murko, Elena, Valentin Kalashnikov, Anton Gorbachev, and Igor Mukhomedzyanov. "Using of Shell Filtering Constructions for Concentrating Plant’s Coal Slurry Dewatering." E3S Web of Conferences 105 (2019): 02029. http://dx.doi.org/10.1051/e3sconf/201910502029.

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The urgency of using mining waste is also emphasized by the environmental component: reducing the anthropogenic load on the region through the integrated development of mineral resources with an increase in the waste-free component of technological processes will undoubtedly improve the difficult environmental situation in Kuzbass. This will be reflected in the reduction of pollution of surface and groundwater, the atmosphere, the soil, the reduction of the land capacity of mining enterprises by reducing the area occupied by the treatment facilities. The study of the state of the issue of coal sludge dewatering showed that at present there is no unified technology of dewatering using geotextile materials (Geotube® etc.). With the general similarity of existing technologies, there were no uniform requirements for the preparation of raw materials, the site for work, the type, properties and parameters of the geotextile used, etc., which makes it difficult to apply this or that technology in industrial conditions and large-scale coal sludge. Thus, the purpose of this study is to select the most optimal geotextile material (in terms of price / quality ratio) and to develop a technological scheme for the dewatering of water-coal pulp formed in the radial thickener of the concentrating plant.

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21

FONSECA, A. G., G. F. MEENAN, and H. B. OBLAD. "Automatic Control of Coal Flotation and Dewatering Processes." Coal Preparation 13, no. 1-2 (January 1993): 73–83. http://dx.doi.org/10.1080/07349349308905123.

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22

SUNG, D. J., and B. K. PAREKH. "A Parametric Study of Dewatering of Fine Coal." Coal Preparation 17, no. 1-2 (January 1996): 25–38. http://dx.doi.org/10.1080/07349349608905255.

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23

GERL, S., and W. STAHL. "Improved Dewatering of Coal by Steam Pressure Filtration." Coal Preparation 17, no. 1-2 (January 1996): 137–46. http://dx.doi.org/10.1080/07349349608905263.

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24

Guo, J., S. Hodges, and P. H. T. Uhlherr. "Dewatering of HTD Coal Slurry by Mechanical Expression." Coal Preparation 18, no. 3-4 (January 1997): 227–39. http://dx.doi.org/10.1080/07349349708905148.

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25

Tao, D., J. G. Groppo, and B. K. Parekh. "Enhanced ultrafine coal dewatering using flocculation filtration processes." Minerals Engineering 13, no. 2 (February 2000): 163–71. http://dx.doi.org/10.1016/s0892-6875(99)00162-4.

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26

Tao, D., B. K. Parekh, J. T. Liu, and S. Chen. "An investigation on dewatering kinetics of ultrafine coal." International Journal of Mineral Processing 70, no. 1-4 (June 2003): 235–49. http://dx.doi.org/10.1016/s0301-7516(03)00025-5.

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27

Kanda, Hideki, and Hisao Makino. "Energy-efficient coal dewatering using liquefied dimethyl ether." Fuel 89, no. 8 (August 2010): 2104–9. http://dx.doi.org/10.1016/j.fuel.2010.02.019.

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28

Ma, Xiaomin, Yuping Fan, Xianshu Dong, Ruxia Chen, Hongliang Li, Dong Sun, and Suling Yao. "Impact of Clay Minerals on the Dewatering of Coal Slurry: An Experimental and Molecular-Simulation Study." Minerals 8, no. 9 (September 11, 2018): 400. http://dx.doi.org/10.3390/min8090400.

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The cleaning process of coals is challenging due to the existence of clay minerals. The overall objective of this study is to investigate how the dewatering of coal slurry is impacted by the presence of clay minerals, i.e., kaolinite and montmorillonite. Filtration tests were first conducted to investigate the effect of kaolinite and montmorillonite on the dewatering efficiency of coal. Specifically, we measured the filtration velocity, moisture, average specific resistance, and porosity of filter cakes for six slurry samples, in which different amounts of kaolinite and montmorillonite were contained. Filtration tests show that a small amount of kaolinite and montmorillonite leads to a significant reduction in the filtration velocity and porosity, and a big increase in the average specific resistance and the moisture of the filter cake. We observe that most kaolinite existed in the top and middle layers of the filter cake, while most montmorillonite existed in the top layer; on the contrary, little montmorillonite is observed in the middle and bottom layers of the filter cake. Montmorillonite results in a much more deteriorative effect than kaolinite. Considering that the interactions between clay minerals and water may play a key role, we then further investigate the effect of such interactions using molecular simulations. Simulation results show that water molecules could hardly diffuse into kaolinite from the edge, while they could readily penetrate into the montmorillonite layers from the edge surface. This result can be explained by the hydrated cation in montmorillonite. The adsorption density of water on the octahedral surface of kaolinite is higher than that of water on the tetrahedral surface of kaolinite. Furthermore, the adsorption density of water on the double surfaces of kaolinite is higher than that of water on the montmorillonite surface. This research is expected to provide benefits or contributions to the dewatering of clay-rich coal tailings.

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29

Liu, Jian Zhong, Yu Jie Yu, Fu Yan Gao, Ya Xuan Hu, Jun Hu Zhou, and Ke Fa Cen. "Effects of Hydrothermal Dewatering on Kinetics and Mechanism of Brown Coals Pyrolysis." Advanced Materials Research 614-615 (December 2012): 53–58. http://dx.doi.org/10.4028/www.scientific.net/amr.614-615.53.

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Two brown coals from China were dewatered under hydrothermal dewatering (HTD) conditions at 250–320 °C for 1 h in a 2 L autoclave. The HTD products and brown raw coals were pyrolyzed in a thermogravimetry analyzer at heat rate of 15°C/min from ambient temperature to 800°C. And the gas products were measured by Fourier Transform Infrared Spectrometer. Besides, The Coast-Redfern model was employed to analyze the effects of HTD on kinetics during coal pyrolysis process. The results showed that the initial temperatures of each pyrolysis stage of HTD products were higher than that of raw coals. The temperatures at which methane appears during pyrolysis process increased and the total absorbance intensity of CH4 was weakened as increasing HTD temperature. Moreover, the activity energy also increased as increasing HTD temperature. It meant that thermal stability of brown coals was improved during HTD process.

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30

Fan, Li, Ming Yuan Zhou, and Xiu Li Li. "Dewatering of Sewage Sludge with Coal as a Conditioner Using Thermal Compression." Applied Mechanics and Materials 295-298 (February 2013): 1452–55. http://dx.doi.org/10.4028/www.scientific.net/amm.295-298.1452.

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Thermal compression is effective for solid-liquid separation of various materials. In this paper, thermal compression was applied on the dewatering of sewage sludge with coal as a filter aid. Experiments with 0.25-1 mm coal particles (0.2 kg coal/kg dry sludge solid) obtained cakes of solid content over 49%. Higher dosage of coal generated cakes with lower moisture content. The combustion behavior of the sludge cake was studied using TG/DTG analysis. The results showed that a total weight loss of 65.1% occurred from 25 °C to 800 °C, including two major weight loss stages corresponding to loss of moisture and volatile materials respectively.

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31

Lian, Huiqin, Haiyang Yi, Yi Yang, Bin Wu, and Rui Wang. "Impact of Coal Mining on the Moisture Movement in a Vadose Zone in Open-Pit Mine Areas." Sustainability 13, no. 8 (April 7, 2021): 4125. http://dx.doi.org/10.3390/su13084125.

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Long-term dewatering of groundwater is a necessary operation for mining safety in open-pit coal mines, as extensive dewatering might cause ecological problems due to dramatic changes in moisture movement in the soil, especially in ecologically fragile areas. In order to evaluate the impact of the coal mining operation on moisture movement in the vadose zone and vegetation, this paper presents a quantitative methodology and takes the Baorixile open-pit coal mine as a study example. A long-term in situ experiment (from 2004 to 2018), laboratory analysis, and numerical modelling were conducted to analyze the mechanisms and relationship among the dropping groundwater level, the vadose-zone moisture, and the ecological responses in the grassland area. The experiment data and modelling results suggest that groundwater level dropping during open-pit mining operation has limited influence on the vadose zone, exhibiting a variation of capillary water zone within a depth of 3 m while the vadose zone and soil water zone were at least 16 m deep. The critical evaporation depth of ground water is 8 m. The long-term influence radius of groundwater dewatering is about 2.72 km during the Baorixile mining operation, and the groundwater level change mainly influences the lower part of the intermediate vadose zone and the capillary water zone below 16 m, with little influence on the moisture contents in the soil water zone where the roots of shallow vegetation grow. The results from this study provide useful insight for sustainable development of coal mining in ecologically fragile areas.

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32

Selomulya, C., J. Y. H. Liao, G. Bickert, and R. Amal. "Micro-properties of coal aggregates: Implications on hyperbaric filtration performance for coal dewatering." International Journal of Mineral Processing 80, no. 2-4 (September 2006): 189–97. http://dx.doi.org/10.1016/j.minpro.2006.04.004.

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33

Adnyano, A. A. Inung Arie, and Muhammad Bagaskoro. "Technical Study Of Mine Dewatering System In Coal Mining." PROMINE 8, no. 1 (July 13, 2020): 28–33. http://dx.doi.org/10.33019/promine.v8i1.1794.

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Coal mining by PT. Tambang Bukit Tambi uses an open pit mining system where one of the factors that can affect mining is water that entering the mining area, so water control must be carried out, one of the ways is by using mine dewatering system. The purpose of this study is 1) To know the debit of water entering the mining area. 2) To design a pumping plan 3) To create an ideal sump design for handling water that entering the mining area. Based on the research, the daily discharge is 32,243.36 m3 / day where the water discharge that can be released by 2 Kenflo XA 125 / 40B pumps is 640 m3 / hour in 50.38 hours and the water control effort is made a sump that must accommodate water amounting to 19,427.26 m3 and after the calculation is obtained a trapezoid-shaped sump design with size length and surface width of 63.7 m, length and width of the base of the sum of 60.9 m and depth of 5 meters.

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34

Wu, Junhong, Jianzhong Liu, Shao Yuan, Xu Zhang, Yan Liu, Zhihua Wang, and Junhu Zhou. "Sulfur Transformation during Hydrothermal Dewatering of Low Rank Coal." Energy & Fuels 29, no. 10 (September 24, 2015): 6586–92. http://dx.doi.org/10.1021/acs.energyfuels.5b01258.

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35

Salih, Hafiz H., Lixia Wang, Vinod Patel, Vasudevan Namboodiri, and Kishore Rajagopalan. "The utilization of forward osmosis for coal tailings dewatering." Minerals Engineering 81 (October 2015): 142–48. http://dx.doi.org/10.1016/j.mineng.2015.07.024.

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36

TAO, D., J. G. GROPPO, and B. K. PAREKHM. "Effects of Vacuum Filtration Parameters on Ultrafine Coal Dewatering." Coal Preparation 21, no. 3 (September 2000): 315–35. http://dx.doi.org/10.1080/07349340008945624.

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37

SCHEINER, BERNARD J. "Screen Dewatering of Coal-Clay Waste from Preparation Plants." Coal Preparation 17, no. 1-2 (January 1996): 39–46. http://dx.doi.org/10.1080/07349349608905256.

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38

Banks, P. J., and D. R. Burton. "PRESS DEWATERING OF BROWN COAL: PART 1-EXPLORATORY STUDIES." Drying Technology 7, no. 3 (September 1989): 443–75. http://dx.doi.org/10.1080/07373938908916603.

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39

Wheelock, T. D., and J. Drzymala. "Coal Hydrophobicity and its Role in Filtration and Dewatering." Filtration & Separation 28, no. 5 (September 1991): 351–31. http://dx.doi.org/10.1016/0015-1882(91)80159-3.

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40

Alam, Naureen, Orhan Ozdemir, Marc A. Hampton, and Anh V. Nguyen. "Dewatering of coal plant tailings: Flocculation followed by filtration." Fuel 90, no. 1 (January 2011): 26–35. http://dx.doi.org/10.1016/j.fuel.2010.08.006.

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41

Palica, Micha∼. "Mechanical dewatering of the flotation concentrate of coking coal." Chemical Engineering and Processing: Process Intensification 33, no. 3 (July 1994): 141–49. http://dx.doi.org/10.1016/0255-2701(94)90004-3.

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42

Parekh, B. K., X. X. Shao, and D. J. Sung. "Dewatering of fine coal slurry using waste fibrous material." Mining, Metallurgy & Exploration 20, no. 2 (May 2003): 102–6. http://dx.doi.org/10.1007/bf03403140.

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43

Sung, Dong-Jin, and Bhupendra K. Parekh. "Statistical evaluation of hyperbaric filtration for fine coal dewatering." Korean Journal of Chemical Engineering 13, no. 3 (May 1996): 304–9. http://dx.doi.org/10.1007/bf02705954.

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Lavrinenko, A. A., G. Yu Golberg, and O. G. Lusinyan. "Gravity dewatering of metallurgical coal flotation tailings using flocculants." Mining informational and analytical bulletin, no. 11 (2020): 5–13. http://dx.doi.org/10.25018/0236-1493-2020-11-0-5-13.

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Branajaya, Romi, Peter Archer, and Andrew Farley. "Pushing the boundaries – deployment of innovative drilling, completion and production technology to advance a deep coal seam play." APPEA Journal 59, no. 2 (2019): 770. http://dx.doi.org/10.1071/aj18115.

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Following technical success of vertical and deviated wells, Strike Energy audaciously continued to push the envelope while proving the commerciality of the deep coal seam play in PEL96. It was clear that extending the reservoir contact area of the wellbore and using innovative dewatering to significantly increase drainage was prudent. A horizontal well intercepting a vertical well coupled with multi-stage fracture stimulation was selected to achieve that goal. Furthermore, a new application of wide operating range electric submersible pumps would enable dewatering to much lower water rates to avoid running the pumps dry or damaging the fracture network upon gas desorption and breakthrough. Although a wellbore stability issue was encountered during the well construction phase, requiring a modified well trajectory, the horizontal well successfully intercepted the vertical well, reaching planned total measured depth. It also altered fracture stimulation approach to an indirect vertical fracture completion application, whereby fractures are initiated from the interburden layer below the coal seam. A million pounds of proppant was successfully placed in seven fracture stages. During the proppant pumping, diagnostic tools (tiltmeter and microseismic) and chemical tracers were utilised. The real-time microseismic confirmed the propagation of fracture from interburden upwards into the target coal seam. This presents the integration of well performance, subsurface information, past drilling practices and stimulation treatment results to support the decision-making process of a horizontal well construction and stimulation design as well as integration of real-time information to overcome operation difficulties and optimise well delivery. Tracer samplings and ongoing production testing during dewatering are also presented.

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Vaziri Hassas, Behzad, Fırat Karakaş, and Mehmet Sabri Çelik. "Ultrafine coal dewatering: Relationship between hydrophilic lipophilic balance (HLB) of surfactants and coal rank." International Journal of Mineral Processing 133 (December 2014): 97–104. http://dx.doi.org/10.1016/j.minpro.2014.10.010.

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Oscar, Agus W., Ir H. Dicky Muslim M.Sc., Nana Sulaksana, and Febri Hirnawan. "RESPONSE OF STABLE OVERALL SLOPE GEOMETRY OF OPEN PIT COAL MINE IN WARUKIN FORMATION TO DEWATERING AND PEAK GROUND SEISMIC IN SOUTH KALIMANTAN, INDONESIA." Buletin Sumber Daya Geologi 11, no. 1 (May 10, 2016): 55–72. http://dx.doi.org/10.47599/bsdg.v11i1.10.

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Understanding of the response of the mine slope stability is very important regarding the safety of life and investment / productivity / environment, as anticipation of landslide prevention based on the latest research. Mine slope behavior previously discussed widely in terms of the response due to dewatering and seismic (Peak Ground Acceleration) as well through verification. This paper aims to obtain a broad dimension of design criteria that are not only unstable slopes, but the slope is stable under various conditions of the rock mass saturation (dewatering) and seismic condition. Response of slope stability per geotechnical rocks unit from different formations or any engineering formation as a result of environmental influences, for example, the same quake, will be different. This means that the geometry of the same slope in other formation will have different stability conditions (safety factor of the slope) due to the same seismic acceleration. This is also similar due to dewatering. The method used for this study is the deductive-probabilistic method with a hypothetical verification approach. The Standard statistical analysis is used to test the data normality and homogeneity, average and independent differences, as well as regression-correlation test. The research results show that dewatering activitycan decrease ground water level (GWL/MAT) of the slope, so the durability of sliding along the sliding plane is reduced (increasing slope safety factor). At the same time earthquake reduces shear strength and increases driving force, so the safety factor of the slope suddenly downs. Slope stability decreased due to the earthquake, but dewatering improves slope stability. Thus, the slope in dewatering conditions will be kept stable through simulation to anticipate earthquake.

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Stahl, R. P., and D. C. Sego. "Freeze-Thaw Dewatering and Structural Enhancement of Fine Coal Tails." Journal of Cold Regions Engineering 9, no. 3 (September 1995): 135–51. http://dx.doi.org/10.1061/(asce)0887-381x(1995)9:3(135).

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Rulyov, N. N., B. Y. Korolyov, and N. M. Kovalchuk. "Application of Ultra-Flocculation for Improving Fine Coal Concentrate Dewatering." Coal Preparation 26, no. 1 (April 2006): 17–32. http://dx.doi.org/10.1080/07349340600619519.

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Patwardhan, A., Y. P. Chugh, B. J. Arnold, and A. N. Terblanche. "Dewatering Ultrafine Clean Coal in a T. H. Filter Press." Coal Preparation 26, no. 1 (April 2006): 33–54. http://dx.doi.org/10.1080/07349340600620004.

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