Study on Composite Fracture Characteristics and Hydraulic Fracturing Behavior of Hard Rock
Source abstract
Abstract
To investigate the influence of non-singular terms (T stress) in the stress field on the composite fractures of hard rock Type I–II, such as rock splitting failure and hydraulic fracture propagation, this study focused on hard rocks in metallic mines. Through splitting tests and hydraulic fracturing experiments, the impact of T stress on the characteristics of Type I–II composite fractures in hard rocks was analyzed. Utilizing the generalized maximum tangential (GMTS) stress criterion considering T stress, the stress intensity factors of hard rock Type I–II composite fractures with different pre-existing crack angles were predicted. The critical fracture pressure expression for hard rocks was derived based on the maximum tangential stress (MTS) criterion. The results indicate that the GMTS criterion, considering T stress, is more suitable for describing the characteristics of Type I–II composite fractures under rock-splitting loads. However, under hydraulic fracturing, T stress has a minor influence on the fracture characteristics of hard rock hydraulic fractures. Therefore, when predicting the critical fracture pressure of hydraulic fractures, T stress can be disregarded. This study provides a scientific basis and guidance for hard rock hydraulic fracturing engineering.
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Research context
OpenAlex topics: Rock Mechanics and Modeling · Hydraulic Fracturing and Reservoir Analysis · Geotechnical and Geomechanical Engineering
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Resources & Environment and Safety Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
School of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China
School of Building Engineering, Hunan Institute of Engineering, Xiangtan 411201, China
Funding
National Natural Science Foundation of China · Natural Science Foundation of Hunan Province · Scientific Research Foundation of Hunan Provincial Education Department
References (46)
Show source-provided references
1. Simulation of the interactions between hydraulic and natural fractures using a fracture mechanics approach10.1016/j.jrmge.2019.07.004 ↗
2. Apparent fracture toughness for LEFM applications in hydraulic fracture modeling10.1016/j.engfracmech.2020.106984 ↗
3. Zhang, Z.-T., Wang, Y.-H., Gao, W.-H., Hu, W., and Liu, S.-K. (2023). Permanent Deformation and Its Unified Model of Coal Gangue Subgrade Filler under Traffic Cyclic Loading. Appl. Sci., 13.10.1038/s41598-023-35199-0 ↗
4. Degradation-induced evolution of particle roundness and its effect on the shear behaviour of railway ballast10.1016/j.trgeo.2020.100388 ↗
5. Influence of natural fractures on hydraulic fracture propagation behavior10.1016/j.engfracmech.2022.108932 ↗
6. González-Velázquez, J.L. (2021). A Practical Approach to Fracture Mechanics, Elsevier.10.1016/B978-0-12-823020-6.00002-5 ↗
7. On the Crack Extension in Plates under Plane Loading and Transverse Shear10.1115/1.3656897 ↗
8. Some basic problems in fracture mechanics and new concepts10.1016/0013-7944(73)90027-1 ↗
9. An energy release rate criterion for mixed mode fracture10.1007/BF00038891 ↗
10. The effect of T-stress on the fracture of brittle rock under compression10.1016/j.ijrmms.2015.06.009 ↗
11. EMTSN criterion for evaluating mixed mode I/II crack propagation in rock materials10.1016/j.engfracmech.2017.12.014 ↗
12. The Effect of the Non-singular T-stress Components on Crack Tip Plastic Zone under Mode I Loading10.1016/j.mspro.2014.06.026 ↗
13. Direct evaluation of stress intensity factors and T-stress for bimaterial interface cracks using the extended isogeometric boundary element method10.1016/j.tafmec.2023.104091 ↗
14. Investigation of T-stress and tensile strength effect on crack tip conditions and crack initiation angle in off-axis laminate composite10.1016/j.tafmec.2024.104283 ↗
15. Tensile mode fracture toughness experiments on andesite rock using disc and semi-disc bend geometries with varying loading spans10.1016/j.tafmec.2022.103325 ↗
16. Fracture under complex stress—The angled crack problem10.1007/BF00191106 ↗
17. The role of T-stress in brittle fracture for linear elastic materials under mixed-mode loading10.1046/j.1460-2695.2001.00377.x ↗
18. A generalized strain energy density criterion for mixed mode fracture analysis in brittle and quasi-brittle materials10.1016/j.tafmec.2015.09.004 ↗
19. Mode I Fracture Analysis of Polymethylmetacrylate Using Modified Energy-Based Models10.1134/S1029959915040050 ↗
20. Combined effects of in-plane and out-of-plane constraints on fracture behaviors in central-cracked stiffened plates: A model based on plastic zone size10.1016/j.engfracmech.2021.107958 ↗
21. Mixed mode I/II fracture behavior and surface morphology of hard rock under dynamic loading10.1016/j.tafmec.2023.103860 ↗
22. Stress intensity factors and T-stress for an edge cracked Brazilian disk specimen under diametrically distributed load10.1016/j.tafmec.2022.103402 ↗
23. A modified G criterion considering T-stress and differentiating the separation and shear failure in crack propagation10.1016/j.ijsolstr.2021.111357 ↗
24. Analysis of Fracture Characteristics of Ore Rock Based on GMTS Criterion10.1007/s12205-023-1916-9 ↗
25. Seepage-stress coupling mechanism for intersections between hydraulic fractures and natural fractures10.1016/j.petrol.2018.07.019 ↗
26. Resistivity response of coal under hydraulic fracturing with different injection rates: A laboratory study10.1016/j.ijmst.2022.06.004 ↗
27. Characteristics of mixed-mode I–II fracture of bedding mud shale based on discrete element method10.1016/j.petrol.2022.111135 ↗
28. Tada, H., Paris, P.C., and Irwin, G.R. (2000). The Stress Analysis of Cracks, ASME Press.10.1115/1.801535 ↗
29. An efficient algorithm for propagating fluid-driven fractures10.1007/s004660050514 ↗
30. Predicting hydraulic fracture propagation based on maximum energy release rate theory with consideration of T-stress10.1016/j.fuel.2020.117337 ↗
31. An analytical method for mixed-mode propagation of pressurized fractures in remotely compressed rocks10.1023/A:1007624315096 ↗
32. Theoretical research on formation fracture pressure and initiation Angle based on wellbore perforation model
33. Effect of different test methods on the disintegration behaviour of soft rock and the evolution model of disintegration breakage under cyclic wetting and drying10.1016/j.enggeo.2020.105888 ↗
34. Evolution of the disintegration breakage of red-bed soft rock using a logistic regression model10.1016/j.trgeo.2020.100382 ↗
35. Growth of geologic fractures into large-strain populations: Review of nomenclature, subcritical crack growth, and some implications for rock engineering10.1016/S1365-1609(99)00115-X ↗
36. Determination of Fracture Toughness of Anisotropic Rocks by Boundary Element Method10.1007/s00603-005-0089-9 ↗
37. Rock-concrete interfacial crack propagation under mixed mode I–II fracture10.1061/(ASCE)EM.1943-7889.0001461 ↗
38. Thermal-Hydraulic-Mechanical (THM) Coupling Behaviour of Fractured Rock Masses10.1155/2023/9764934 ↗
39. Ingraffea, A.R. (1987). Fracture Mechanics of Rock, Academic Press.
40. Three-Dimensional analysis of mixed mode Compact-Tension-Shear (CTS) Specimens: Stress intensity Factors, T-stresses and crack initiation angles10.1016/j.tafmec.2021.103218 ↗
41. Modified generalized maximum tangential stress criterion for simulation of crack propagation and its application in discontinuous deformation analysis10.1016/j.engfracmech.2021.108159 ↗
42. Mroz, K.P. (2008). Fatigue Cracks Growth in the Bimaterial System, The Mathematical Model and Numerical Solution, IPPTPAN (IFTRPAS). (In Polish).
43. Mixed-mode I + II tensile fracture analysis of thermally treated granite using straight-through notch Brazilian disc specimens10.1016/j.engfracmech.2020.107111 ↗
44. Fractured rock mass hydraulic fracturing under hydrodynamic and hydrostatic pressure joint action10.1007/s11771-016-3331-6 ↗
45. Research on the initiation pressure criterion of directional hydraulic fracturing in coal mine10.1016/j.heliyon.2023.e17638 ↗
46. Study on acoustic emission response characteristics of sandstone in directional fracturing under different filtration surfaces