Abstract
Some coal seams have loose textures and developed beddings, so it is difficult to obtain samples to study their mechanics and permeability characteristics. However, it is possible to carry out related research by using remoulded coal instead of raw coal. With polyvinyl acetate emulsion as a binder, remoulded coals were obtained by different preparation processes and quantified using the cosine similarity method. The results show that remoulded coals, which were prepared with a 10% binder concentration, 50 °C drying temperature, 1:1 water-binder ratio and 60-MPa forming pressure, are similar to the raw coal in this case. Changing the binder concentration, drying temperature, water-binder ratio and forming pressure can improve the mechanics and permeability characteristics of remoulded coals, which informs related experimental research.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
Altun NE, Hicyilmaz C, Kök MV (2001) Effect of different binders on the combustion properties of lignite - part I. Effect on thermal properties. J Therm Anal Calorim 65:787–795. https://doi.org/10.1023/A:1011915829632
Benk A (2010) Utilisation of the binders prepared from coal tar pitch and phenolic resins for the production metallurgical quality briquettes from coke breeze and the study of their high temperature carbonization behaviour. Fuel Process Technol 91:1152–1161. https://doi.org/10.1016/j.fuproc.2010.03.030
Blesa MJ, Miranda JL, Izquierdo MT, Moliner R (2003) Curing temperature effect on mechanical strength of smokeless fuel briquettes prepared with molasses. Fuel 82:943–947. https://doi.org/10.1016/S0016-2361(02)00416-7
Cao S, Li Y, Guo P et al (2010) Comparative research on permeability characteristics in complete stress-strain process of briquettes and coal sampes. Chin J Rock Mech Eng 29:899–906
Chen P, Wang E, Chen X et al (2015) Regularity and mechanism of coal resistivity response with different conductive characteristics in complete stress-strain process. Int J Min Sci Technol 25:779–786
Chen J, Li X, Cao H (2019) Experimental investigation of coal-like materials for hydraulic fracturing based on fluid-solid interaction. J Nat Gas Sci Eng 69:102928. https://doi.org/10.1016/j.jngse.2019.102928
Cheng W, Sun L, Wang G et al (2016) Experimental research on coal seam similar material proportion and its application. Int J Min Sci Technol 26:913–918. https://doi.org/10.1016/j.ijmst.2016.05.034
Deng J, Zhang H, Wu J et al (2004) The effect of granularity, pressure and moisture content on cold strength of briquette. J Eng Thermophys 25:184–186
Dutka B, Kudasik M, Topolnicki J (2012) Pore pressure changes accompanying exchange sorption of CO2/CH4 in a coal briquette. Fuel Process Technol 100:30–34. https://doi.org/10.1016/j.fuproc.2011.12.043
Geng J, Xu J, Nie W et al (2017) Regression analysis of major parameters affecting the intensity of coal and gas outbursts in laboratory. Int J Min Sci Technol 27:327–332. https://doi.org/10.1016/j.ijmst.2017.01.004
Hu Q, Zhang S, Wen G et al (2015) Coal-like material for coal and gas outburst simulation tests. Int J Rock Mech Min Sci 74:151–156. https://doi.org/10.1016/j.ijrmms.2015.01.005
Huang Q, Yin G, Jiang Y (2010) Experimental study of mechanical characteristics of coal specimen in process of unloading confining pressure in geostress field and analysis of gas seepage characteristics. Chin J Rock Mech Eng 29:1639–1648
Jiang C, Yin G, Li W, Huang Q (2011) Experimental of mechanical properties and gas flow of containing-gas coal under different unloading speeds of confining pressure. Procedia Eng 26:1380–1384. https://doi.org/10.1016/j.proeng.2011.11.2314
Jiang J, Yang W, Cheng Y et al (2019) Pore structure characterization of coal particles via MIP , N2 and CO2 adsorption: effect of coali fi cation on nanopores evolution. Powder Technol 354:136–148. https://doi.org/10.1016/j.powtec.2019.05.080
Lee Y-K, Kim W-Y, Dora Cai Y, Han J (2003) CoMine: efficient mining of correlated patterns. In: Third IEEE International Conference on Data Mining. IEEE, Melbourne, FL, USA, USA, pp 581–584
Li B, Ren C, Wang Z et al (2020) Journal of Petroleum Science and Engineering Experimental study on damage and the permeability evolution process of methane-containing coal under different temperature conditions. J Pet Sci Eng 184:106509. https://doi.org/10.1016/j.petrol.2019.106509
Liu J (2017) Experimental study and evaluation on making process of moulded coal based on permeability characteristics. Taiyuan university of technology 11–14
Liu P, Qin Y, Liu S, Hao Y (2018) Numerical modeling of gas flow in coal using a modified dual-porosity model: a multi-mechanistic approach and finite difference method. Rock Mech Rock Eng 51:2863–2880. https://doi.org/10.1007/s00603-018-1486-1
Mangena SJ, du Cann VM (2007) Binderless briquetting of some selected South African prime coking, blend coking and weathered bituminous coals and the effect of coal properties on binderless briquetting. Int J Coal Geol 71:303–312. https://doi.org/10.1016/j.coal.2006.11.001
Mollah MM, Jackson WR, Marshall M, Chaffee AL (2015) An attempt to produce blast furnace coke from Victorian brown coal. Fuel 148:104–111. https://doi.org/10.1016/j.fuel.2015.01.098
Mollah MM, Marshall M, Qi Y et al (2016) Attempts to produce blast furnace coke from Victorian brown coal. 4. Low surface area char from alkali treated brown coal. Fuel 186:320–327. https://doi.org/10.1016/j.fuel.2016.08.087
Nheta W, Lubisi TP, Jeli E (2018) Effect of different binders on mechanical properties of iron flotation concentrate briquettes. Mater Today Proc 5:294–301. https://doi.org/10.1016/j.matpr.2017.11.085
Nomura S (2016) Coal briquette carbonization in a slot-type coke oven. Fuel 185:649–655. https://doi.org/10.1016/j.fuel.2016.07.082
Nomura S, Arima T (2017) Influence of binder (coal tar and pitch) addition on coal caking property and coke strength. Fuel Process Technol 159:369–375. https://doi.org/10.1016/j.fuproc.2017.01.024
Perera MSA, Ranjith PG (2012) Carbon dioxide sequestration effects on coal’s hydro-mechanical properties: a review. Int J Energy Res 36:1015–1031. https://doi.org/10.1002/er.2921
Skoczylas N, Dutka B, Sobczyk J (2014) Mechanical and gaseous properties of coal briquettes in terms of outburst risk. Fuel 134:45–52. https://doi.org/10.1016/j.fuel.2014.05.037
Sobczyk J (2014) A comparison of the influence of adsorbed gases on gas stresses leading to coal and gas outburst. Fuel 115:288–294. https://doi.org/10.1016/j.fuel.2013.07.016
Sun B, Yu J, Tahmasebi A, Han Y (2014) An experimental study on binderless briquetting of Chinese lignite: effects of briquetting conditions. Fuel Process Technol 124:243–248. https://doi.org/10.1016/j.fuproc.2014.03.013
Wang J, Zhang G, Shen J et al (2008) Discussing foundation and principle on choosing evaluating index of groundwater function. Hydrogeol Eng Geol 2:76–81
Wang S, Elsworth D, Liu J (2011) International Journal of Coal Geology Permeability evolution in fractured coal: the roles of fracture geometry and water-content. Int J Coal Geol 87:13–25. https://doi.org/10.1016/j.coal.2011.04.009
Wang G, Li W, Wang P et al (2017) Deformation and gas flow characteristics of coal-like materials under triaxial stress conditions. Int J Rock Mech Min Sci 91:72–80. https://doi.org/10.1016/j.ijrmms.2016.11.015
Wang L, Chen Z, Wang C et al (2019) Reassessment of coal permeability evolution using steady-state flow methods: the role of flow regime transition. Int J Coal Geol 211:103210. https://doi.org/10.1016/j.coal.2019.103210
Wu X, Liu C (2011) Analysis of moulded coal porosity base on surface characteristics. Procedia Eng 26:1058–1064. https://doi.org/10.1016/j.proeng.2011.11.2274
Xu J, Xian X, Du Y, Zhang G (1993) An experimental study on the mechanical property of Gas-filled Coal. J Chongqing Univ 16:42–47 cnki:SUN:FIVE.0.1993-05-006
Yang Y, Song Y, Chen S (2007) Test study on permeability properties of coal specimen in complete stress-strain process. Rock Soil Mech 28:381–385. https://doi.org/10.16285/j.rsm.2007.02.035
Yin G, Jiang C, Xu J et al (2012) An experimental study on the effects of water content on coalbed gas permeability in ground stress fields. Transp Porous Media 94:87–99. https://doi.org/10.1007/s11242-012-9990-3
Yue J, Wang Z (2017) Imbibition characteristics of remolded coal without gas. J China Coal Soc 42:377–384. https://doi.org/10.13225/j.cnki.jccs.2017.0303
Zhai J, Wang J, Lu G et al (2018) Permeability characteristics of remolded tectonically deformed coal and its influence factors. J Nat Gas Sci Eng 53:22–31. https://doi.org/10.1016/j.jngse.2018.02.023
Zhang Z, Cao S, Guo P, Liu Y (2014) Comparison of the deformation characteristics of coal in gas adsorption-desorption process for raw and briquette coals. J China Univ Min Technol 43:388–394. https://doi.org/10.13247/j.cnki.jcumt.000123
Zhang G, Sun Y, Xu Y (2018) Review of briquette binders and briquetting mechanism. Renew Sust Energ Rev 82:477–487. https://doi.org/10.1016/j.rser.2017.09.072
Zhong Q, Yang Y, Li Q et al (2017) Coal tar pitch and molasses blended binder for production of formed coal briquettes from high volatile coal. Fuel Process Technol 157:12–19. https://doi.org/10.1016/j.fuproc.2016.11.005
Author information
Authors and Affiliations
Corresponding author
Additional information
Responsible Editor: Amjad Kallel
Rights and permissions
About this article
Cite this article
Liu, J., Qin, Y. Experimental study and evaluation of remoulded coal samples based on mechanics and permeability characteristics. Arab J Geosci 14, 23 (2021). https://doi.org/10.1007/s12517-020-06261-2
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12517-020-06261-2