Investigation of Rock Joint and Fracture Influence on Delayed Blasting Performance
Source abstract
Abstract
Geological structures such as joints and faults in rock mass have a significant influence on open-pit mining. Hence, it is critical to develop an understanding of dynamic joint behavior under blasting loading. This, in turn, can provide both theoretical and practical guidance to improve blasting rock fragmentation and associated bucket excavating efficiency. In this paper, delayed blasting on a highwall bench at an open-pit mine is used as an example; a nonlinear joint blasting model is also constructed. By simplifying the blasting wave propagation velocity and combining the relevant stress and displacement theories of type I and II cracks, equipotential diagrams of the stress and displacement field with the vibration velocity of the particle are obtained. Additionally, ANSYS is used to analyze the distribution of the stress field. This is able to be visualized by the degree of color change post-processing. It is concluded that, with the attenuation of the detonation wave energy, the stress exhibited a decreasing trend in this process. According to the distribution of the peak effective stress, it is found that the peak value first increases to 10–12 MPa and then shows a downward trend.
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Research context
OpenAlex topics: Rock Mechanics and Modeling · Structural Response to Dynamic Loads · Mineral Processing and Grinding
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mining, Liaoning Technical University, Fuxin 123000, China
Institute of Technology and Equipment for the Development and Utilization of Mineral Resources, Liaoning Provincial College of Engineering, Liaoning Technical University, Fuxin 123000, China
School of Energy Engineering, Longdong University, Qingyang 745000, China
School of Science, Liaoning Technical University, Fuxin 123000, China
References (30)
Show source-provided references
1. Bao, S. (2017). Study on the Change Law of Stress and Displacement at the End of Finite-Length Joints with Oblique Incidence of Stress Waves. [Master’s Thesis, Liaoning University of Engineering and Technology].
2. Theoretical study on the propagation characteristics of longitudinal waves in nonlinear deformation joints
3. Research on the influence of joint properties on stress wave propagation and blasting effect
4. Research on the regulation of blasting energy transmission in the blasting position in the hole in rock blasting
5. Analysis of explosion energy transmission and rock breaking effect under the condition of double-point blasting in the hole
6. Calculation and application of hole-by-hole blasting vibration synthesis based on the actual delay range of the detonator
7. Primary explosive processing in the resonant acoustic mixer10.1002/prep.202100008 ↗
8. Modeling blast-induced fragmentation of jointed rock mass using voronoi discrete-element method10.1061/(ASCE)GM.1943-5622.0001743 ↗
9. Effects of tensile stresses on wave propagation across stylolitic rock joints10.1016/j.ijrmms.2021.104617 ↗
10. Experimental study on static and dynamic compression mechanical properties of filled rock joints10.1590/1679-78255988 ↗
11. Discrete element modeling of explosion-induced fracture extension in jointed rock masses
12. Model test study on cylindrical blasting stress wave propagation across jointed rock mass with different initial stresses10.1155/2020/8881302 ↗
13. Investigation of increasing hydraulic fracture conductivity within producing ultra-deep coal seams using time-lapse rate transient analysis: A long-term pilot experiment in the Cooper Basin, Australia10.1016/j.coal.2019.103363 ↗
14. Exploring the influence of rock inherent heterogeneity and grain size on hydraulic fracturing using discrete element modeling10.1016/j.ijsolstr.2019.06.018 ↗
15. A comprehensive parametric study of grain-based models for rock failure process simulation10.1016/j.ijrmms.2019.01.008 ↗
16. Analytical studying the axial performance of fully encapsulated rock bolts10.1016/j.engfailanal.2021.105580 ↗
17. Studying the performance of fully encapsulated rock bolts with modified structural elements10.1007/s40789-020-00388-z ↗
18. Analytic study on the force transfer of full encapsulating rockbolts subjected to tensile force10.1142/S1758825121500976 ↗
19. Simulating Hydraulic Fracture Re-orientation from Oriented Perforations in Heterogeneous Rocks with An Improved Discrete Element Method10.1007/s00603-021-02422-1 ↗
20. Damage assessment of prefabricated prestressed channel slab under plane charge blast10.1016/j.engstruct.2021.113021 ↗
21. Stress corrosion cracking fracture mechanism of cold-drawn high-carbon cable bolts10.1016/j.msea.2019.138479 ↗
22. Mineralogically influenced stress corrosion cracking of rockbolts and cable bolts in underground mines10.1016/j.ijrmms.2019.04.011 ↗
23. Investigation for influences of seepage on mechanical properties of rocks using acoustic emission technique
24. Xiong, J. (1981). Explosive Dynamics and Its Applications, Science Press.
25. Research on the control effect of the initiation position in the hole on the energy transmission of the explosion in rock blasting
26. A Study of Millisecond Blasting on High Bench at Barun Iron Ore Operation
27. Experimental study of stress wave propagation and energy characteristics across rock specimens containing cemented mortar joint with various thickness10.1016/j.ijrmms.2020.104352 ↗
28. Shu, P.-Y., Lin, C.-Y., Li, H.-H., Cheng, T.-W., Ueng, T.-H., and Wang, T.-T. (2020). Dynamic response of rock containing regular sawteeth joints under various loading rates and angles of application. Appl. Sci., 10.10.3390/app10155204 ↗
29. A new safety control method of blasting excavation in high rock slope with joints10.1007/s00603-020-02113-3 ↗
30. Stress wave propagation across jointed rock mass under dynamic extension and its effect on dynamic response and supporting of underground opening10.1016/j.tust.2020.103648 ↗