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Języki publikacji
Abstrakty
Compressive mechanical properties and pore-fissure characteristics of coal rock specimens from three stably developed coal seams M1, M8 and M12 in the Xinjiang Yili Basin were investigated in detail by a series of tests. The results show that the compressive mechanical properties of coal rocks in the Yili Basin are significantly affected by the confining pressure. The peak axial stress increases and the peak modulus of elasticity decreases as the confining pressure increases. The peak axial strain increases and then remains constant, while the peak circumferential strain and peak volumetric strain increase and then decrease. The confining pressure has almost no effect on Poisson’s ratio of the coal rock specimens. In addition, electron microscopy tests show that the microscopic fraction of the coal rock specimens is predominantly vitrinite, accounting for 83.1%-89.2%, while the percentage of the inertinite group is relatively small, at 10.3%-16.1%. The throat radius of the coal rock is mainly concentrated around 1-2μm, while the pore radius of the coal rock is between 150-200μm. The coal rock has an overall fine throat and low permeability, and the coal rock in the Yili Basin of Xinjiang is a typical low-permeability coal rock.
Czasopismo
Rocznik
Tom
Strony
207--218
Opis fizyczny
Bibliogr. 23 poz., rys., tab.
Twórcy
autor
- Changzhou Vocational Institute of Engineering, Changzhou, China
autor
- Changzhou Vocational Institute of Engineering, Changzhou, China
autor
- School of Civil and Transportation Engineering, Hebei University of Technology, Tianjin, China
Bibliografia
- 1. Blondeel M., van de Graaf T., 2018, Toward a global coal mining moratorium? A comparative analysis of coal mining policies in the USA, China, India and Australia, Climatic Change, 150, 89-101.
- 2. Chen S., Yang T., Ranjith P.G., Wei C., 2017, Mechanism of the two-phase flow model for water and gas based on adsorption and desorption in fractured coal and rock, Rock Mechanics and Rock Engineering, 50, 571-586.
- 3. Chen Y.L., Zuo J.P., Liu D.J., Wang Z., 2019, Deformation failure characteristics of coal-rock combined body under uniaxial compression: experimental and numerical investigations, Bulletin of Engineering Geology and the Environment, 78, 3449-3464.
- 4. Fairhurst C.E., Hudson J.A., 1999, Draft ISRM suggested method for the complete stress-strain curve for the intact rock in uniaxial compression, International Journal of Rock Mechanics and Mining Sciences, 36, 3, 279-289.
- 5. Gray I., 1987, Reservoir engineering in coal seams, Part 1 – The physical process of gas storage and movement in coal seams, SPE Reservoir Engineers, 2, 1, 28-34.
- 6. Haque E., Reza S., Ahmed R., 2018, Assessing the vulnerability of groundwater due to open pit coal mining using DRASTIC model: a case study of Phulbari Coal Mine, Bangladesh, Geosciences Journal, 22, 359-371.
- 7. Lin B.Q., Zhou S.N., 1987, Experimental study on gas permeability of coal sample, Journal of China University of Mining and Technology, 16, 2, 21-28.
- 8. Liu Y., Lu C.P., Xiao Z.Y., Guo Y., 2022, Mechanisms underlying the slip and failure of coal-rock parting-coal sructures under unloading conditions, Rock Mechanics and Rock Engineering, 55, 4913-4928.
- 9. National Standardization Administration Committee, 2008, Determination of pore size distribution and porosity of solid materials by mercury pressure and gas adsorption: GB/T21650-2008. Beijing: Standards Press of China.
- 10. National Standardization Management Committee, 2008, Method for microscopic determination of specular reflectance of coal: GB/T6948-2008. Beijing: Standards Press of China.
- 11. National Standardization Administration Committee, 2009, Determination method of physical and mechanical properties of coal and rock: GB/T23561.9-2009. Beijing: Standards Press of China.
- 12. National Standardization Administration Committee, 2013, Determination of maceral group composition and minerals in coal: GB/T 8899-2013. Beijing: Standards Press of China.
- 13. Njiekak G., Schmitt D.R., Kofman R.S., 2018, Pore systems in carbonate formations, Weyburn field, Saskatchewan, Canada: Micro-tomography, helium porosimetry and mercury intrusion porosimetry characterization, Journal of Petroleum Science and Engineering, 171, 1496-1513.
- 14. Qajar J., Arns C.H., 2022, A comparative study of micro-CT and mercury intrusion techniques for predicting permeability and surface area evolution during chemical dissolution, Advances in Water Resources, 168, 104301.
- 15. Shan R.L., Li Z.L., Wang C.H., Wei Y., Tong X., Liu S., Shan Z., 2021, Study on the distribution characteristics of stress deviator in the surrounding rock when mining closely spaced coal seams, Environmental Earth Sciences, 80, 602.
- 16. Wang L., Cheng Y.P., Xu C., An F.H., Jin K., Zhang X.L., 2013, The controlling effect of thick-hard igneous rock on pressure relief gas drainage and dynamic disasters in outburst coal seams, Natural Hazards, 66, 1221-1241.
- 17. Wang X.L., Pan J.N., Wang K., Ge T., Wei J., Wu W., 2020, Characterizing the shape, size, and distribution heterogeneity of pore-fractures in high rank coal based on X-ray CT image analysis and mercury intrusion porosimetry, Fuel, 282, 15, 118754.
- 18. Xu C., Fu Q., Cui X.Y., Wang K., Zhao Y., Cai Y., 2019, Apparent-depth effects of the dynamic failure of thick hard rock strata on the underlying coal mass during underground mining, Rock Mechanics and Rock Engineering, 52, 1565-1576.
- 19. Xue Y., Liu J., Ranjith P.G., Gao F., Xie H., Wang J., 2022, Changes in microstructure and mechanical properties of low-permeability coal induced by pulsating nitrogen fatigue fracturing tests, Rock Mechanics and Rock Engineering, 55, 7469–7488
- 20. Yang J., Zhang Z., Zhao L.F., 2020, Study on pore-fracture characteristics of coal rocks in the Buri Basin, Coal Mine Safety, 51, 12, 214-218.
- 21. Yin T.B., Wang P., Li X.B., Shu R.H., Ye Z.Y., 2016, Effects of thermal treatment on physical and mechanical characteristics of coal rock, Journal of Central South University, 23, 2336-2345.
- 22. Zhong C.L., Zhang Z.Y., Ranjith P.G., Zhang C., Xue K., 2022, The role of pore pressure on the mechanical behavior of coal under undrained cyclic triaxial loading, Rock Mechanics and Rock Engineering, 55, 1375-1392.
- 23. Zhu H.X., Han L.J., Meng Q.B., Liu J., Meng L., Dong W., 2021, The split-permeation grouting mechanism of loose and broken coal rock masses considering the temporal and spatial characteristics of slurry viscosity, KSCE Journal of Civil Engineering, 25, 1887-1900.
Uwagi
Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).
Typ dokumentu
Bibliografia
Identyfikator YADDA
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