Abstract
During coal excavation, coal pillars can undergo shear failure due to repeated loading and unloading of mining-induced stress, and this failure may be followed by plastic flow. Change in the permeability of the coal pillar under plastic flow is closely related to the loading path. In this study, the development of the permeability of a coal seam under plastic flow was investigated by conducting permeability testing on a shear-yielded coal sample as it was subjected to cyclic loading and unloading. The results show that the permeability is inversely related to the volumetric strain; that is, the permeability decreases as the volume strain increases and vice versa. However, the permeability at a given strain value is greater during loading than that during unloading. The curve of strain and permeability will form an approximately elliptical hysteresis, and the permeability is a multi-valued function of volumetric strain. As the confining pressure is increased, crack opening decreases, and crack penetration moves from the ends toward the middle of the sample.
Similar content being viewed by others
References
Barton N, Bandis S, Bakhtar K (1985) Strength, deformation and conductivity coupling of rock joints. Int J Rock Mech Min Sci Geomech Abstr 22(3):121–140
Cai Y, Liu D, Mathews JP et al (2014) Permeability evolution in fractured coal—combining triaxial confinement with X-ray computed tomography, acoustic emission and ultrasonic techniques. Int J Coal Geol 122(Complete):91–104
Chen S, Yang C (2017) Wang G (2017) Evolution of thermal damage and permeability of Beishan granite. Appl Therm Eng 110:1533–1542
Chun-Hui Z, Xiao-Ming Z (2016) Strain softening and permeability evolution model of loaded rock and experimental verification. Chin J Geotech Eng 38(6):1125–1132
Clarkson CR, Pan Z, Palmer I (2010) Predicting sorption-induced strain and permeability increase with depletion for coalbed-methane reservoirs. SPE J 15(1):152–159
Geng Y, Tang D, Xu H et al (2017) (2017) Experimental study on permeability stress sensitivity of reconstituted granular coal with different lithotypes. Fuel 202:12–22
Izadi G, Wang S, Elsworth D et al (2011) Permeability evolution of fluid-infiltrated coal containing discrete fractures. Int J Coal Geol 85(2):202–211
Li G, Tang CA, Li LC (2010) Three-dimensional micro flow-stress-damage (FSD) model and application in hydraulic fracturing in brittle and heterogeneous rocks. Key Eng Mater 452–453:581–584
Li LC, Tang CA, Li G et al (2012) Numerical simulation of 3D hydraulic fracturing based on an improved flow-stress-damage model and a parallel FEM technique. Rock Mech Rock Eng 45(5):801–818
Lin W, Kovscek AR (2014) Gas sorption and the consequent volumetric and permeability change of coal I: experimental. Transp Porous Media 105(2):371–389
Liu C, Tang CS, Shi B et al (2013) Automatic quantification of crack patterns by image processing. Comput Geosci 57:77–80
Liu JF, Skoczylas F, Talandier J (2018) Gas permeability of a compacted bentonite–sand mixture: coupled effects of water content, dry density, and confining pressure. Can Geotech J 52(8):1159–1167
Liu JF, Song SB, Cao XL et al (2020) Determination of full-scale pore size distribution of Gaomiaozi bentonite and its permeability prediction. J Rock Mech Geotech Eng 12(2):403–413
McKee CR, Bumb AC, Koenig RA (1988) Stress-dependent permeability and porosity of coal and other geologic formations. SPE Form Eval 3(01):81–91
Mehrabian A, Abousleiman YN (2015) Gassmann equations and the constitutive relations for multiple-porosity and multiple-permeability poroelasticity with applications to oil and gas shale. Int J Numer Anal Meth Geomech 39(14):1547–1569
Meng ZP, Shi XC, Li GQ (2016) Deformation, failure and permeability of coal-bearing strata during longwall mining. Eng Geol 208:69–80
Min TU, Bao-Jie FU, Xie-Xing M (2012) Experimental study of gas permeability of injured coal-rock when relieving mining. J Exp Mech 27(2):249–253
Ni X, Chen Z, Wang P et al (2020) Experimental investigation of the influence of differential stress, confining pressure and strain on aquifer sandstone permeability. Eur J Environ Civil Eng 24(7):915–930
Pan ZJ, Connell LD (2012) Modelling permeability for coal reservoirs: a review of analytical models and testing data. Int J Coal Geol 92:1–44
Ramandi HL, Mostaghimi P, Armstrong R et al (2016) Porosity and permeability characterization of coal: a micro-computed tomography study. Int J Coal Geol 154–155:57–68
Tan XH, Li XP, Liu JY et al (2015) Study of the effects of stress sensitivity on the permeability and porosity of fractal porous media. Phys Lett A 379(39):2458–2465
Tang C, Tham L, Lee P et al (2002) Coupled analysis of flow, stress and damage (FSD) in rock failure. Int J Rock Mech Min Sci 39(4):477–489
Walsh JB (1981) Effect of pore pressure and confining pressure on fracture permeability. Int J Rock Mech Min Sci Geomech Abstr 18(5):429–435
Wang JA, Park HD (2002) Fluid permeability of sedimentary rocks in a complete stress–strain process. Eng Geol 63(3):291–300
Wu JY, Feng MM, Mao XB, Xu JM, Zhang WL, Ni XY, Han GS (2018) Particle size distribution of aggregate effects on mechanical and structural properties of cemented rockfill: experiments and modeling. Constr Build Mater 193:295–311
Wu JY, Jing HW, Yin Q, Meng B, Han GS (2020) Strength and ultrasonic properties of cemented waste rock backfill considering confining pressure, dosage and particle size effects. Constr Build Mater 242(5):118132
Xu T, Tang CA (2008) Modeling of stress-induced permeability evolution and damage of rock. Adv Mater Res 33–37:8
Zhang CL (2016) The stress–strain–permeability behaviour of clay rock during damage and recompaction. J Rock Mech Geotech Eng 8(1):16–26
Zhang R, Jiang Z, Sun Q et al (2013) The relationship between the deformation mechanism and permeability on brittle rock. Nat Hazards 66(2):1179–1187
Zhang Z, Zhang R, Xie H et al (2016) Mining-induced coal permeability change under different mining layouts. Rock Mech Rock Eng 49(9):3753–3768
Zhang GL, Ranjith PG, Liang WG, Haque A, Perera MSA, Li DY (2019a) Stress-dependent fracture porosity and permeability of fractured coal: an in-situ X-ray tomography study. Int J Coal Geol 213:103279
Zhang GL, Ranjith PG, Perera MSA, Lu YY, Choi X (2019b) Quantitative analysis of micro-structural changes in a bituminous coal after exposure to supercritical CO2 and water. Nat Resour Res 28(4):1639–1660
Zhao Y, Tang J, Chen Y et al (2017) Hydromechanical coupling tests for mechanical and permeability characteristics of fractured limestone in complete stress–strain process. Environ Earth Sci 76(1):24
Acknowledgements
This study was supported by the National Natural Science Foundation of China for Young Scholars [Grant number 51574228].
Author information
Authors and Affiliations
Corresponding author
Additional information
Publisher's Note
Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.
Rights and permissions
About this article
Cite this article
Guo, J., Liu, J., Li, Q. et al. Experimental study on the failure law of water-bearing coal and the evolution of permeability under plastic flow. Environ Earth Sci 79, 349 (2020). https://doi.org/10.1007/s12665-020-09095-z
Received:
Accepted:
Published:
DOI: https://doi.org/10.1007/s12665-020-09095-z