Abstract
The efficiency and stability of shaft boring machines depend critically on the slag-discharging system. In this study, we simulate the slagging process by using the coupled computational fluid dynamics/discrete element method and validate the method’s reliability through experiments. We investigate the impact of outlet diameter, inlet diameter, and outlet section length on slag-discharging performance. We establish the slag-discharging principle of the suction pipe by analyzing the particle motion trajectory. The flow field close to the suction pipe can be classified into collecting and lifting zones on the basis of the main flow direction velocity. Furthermore, we propose pipes with seven typical types, among which the straight-conical type exhibits the most favorable slag-discharging performance. The straight-conical pipe enhances the slag-discharging mass by 22.49 % compared with the straight pipe.
Similar content being viewed by others
Abbreviations
- α f :
-
Fluid volume fraction
- t :
-
Time
- u f :
-
Fluid velocity
- P :
-
Fluid pressure
- ρ :
-
Fluid density
- T :
-
Volume-averaged shear stress tensor
- R pf :
-
Equivalent tensor for the momentum transfer between the two phases representing interaction forces
- m p :
-
Particle mass
- u p :
-
Particle velocity
- g :
-
Gravitational acceleration
- Fc :
-
Contact force
- Fd :
-
Drag force
- F L :
-
Lifting force
- Fvm :
-
Virtual mass force
- Fp :
-
Pressure gradient force
- Ip :
-
Moment of inertia
- ω p :
-
Angular velocity
- Md :
-
Drag torque
- Mc :
-
Total moment from contact forces
- T :
-
Shear stress
- T 0 :
-
Yield stress
- μ :
-
Plastic viscosity
- γ :
-
Shear rate
- C D :
-
Drag coefficient
- r p :
-
Particle radius
- D :
-
Outlet diameter
- d :
-
Inlet diameter
- L a :
-
Outlet section length
- L b :
-
Inlet section length
- C x :
-
Flow direction coefficient X
- C y :
-
Flow direction coefficient Y
- F d :
-
Drag force
- r p :
-
Particle radius
References
C. Li, T. Li, Z. Shi, J. Li and G. Jing, 3D analysis on surrounding soil stability of shaft boring machine based on plastic limit equilibrium theory, KSCE Journal of Civil Engineering, 25 (11) (2021) 4467–4480.
X. Hu, Z. Liu and H. Tan, Influence of engineering parameters on rock breaking performance of raise boring machine, Measurement, 174 (2021) 109005.
A. Kaya and U. C. Tarakci, Stability investigation of a deep shaft using different methods, International Journal of Geomechanics, 21 (2) (2021) 05020009.
X. Wang, J. G. Liu, Y. Liu, W. J. Fu and L. Zhu, Multi-sensor fusion and error compensation of attitude measurement system for shaft boring machine, Sensors, 19 (22) (2019) 5007.
Y. Xia, M. Yang, L. Lin, Z. Ji and Z. Zhu, Effect of blade angles on the shovel muck capacity and wear characteristics for TBM scraper, Arabian Journal for Science and Engineering, 46 (5) (2021) 5203–5218.
Q. Gong, F. Wu, D. Wang, H. Qiu and L. Yin, Development and application of cutterhead working status monitoring system for shield TBM tunnelling, Rock Mechanics and Rock Engineering, 54 (4) (2021) 1731–1753.
Herrenknecht, Shaft Boring Cutterhead (SBC), https://www.herrenknecht.com/en/products/productdetail/shaft-boring-cutter head-sbc/ (Accessed 8 Oct 2022).
Z. Liu, S. Li, D. Wang, C. Song, Z. Liu, Y. Tian and G. Jing, Analysis of key technology and research path of full section boring machine for 1000 m vertical shaft with hard rock strata, Journal of China Coal Society, 47 (8) (2022) 3163–3174.
N. Jiao, Y. Wang and C. Meng, Numerical simulation on the flow field and slag carrying efficiency of air flush drilling for vertical shaft boring machine, Journal of China Coal Society, 45 (S1) (2020) 522–531.
S. Masanobu, S. Takano, S. Kanada and M. Ono, Pressure loss due to hydraulic transport of large solid particles in vertical pipes under pulsating flow conditions, Journal of Offshore Mechanics and Arctic Engineering, 143 (6) (2021) 061801.
Y. Dai, Y. Zhang and X. Li, Numerical and experimental investigations on pipeline internal solid-liquid mixed fluid for deep ocean mining, Ocean Engineering, 220 (2021) 108411.
J. Zhang, X. Li, Z. Chen, Y. Zhang, G. Li, K. Yan and T. Lv, Gas-lifting characteristics of methane-water mixture and its potential application for self-eruption production of marine natural gas hydrates, Energies, 11 (1) (2018) 240.
Y. Zhang, X. B. Lu and X. H. Zhang, Numerical simulation on transportation behavior of dense coarse particles in vertical pipe with an optimized Eulerian-Lagrangian method, Physics of Fluids, 34 (3) (2022) 033305.
L. Zhao and T. Wang, On the influence of vortex-induced resistance on oil-shale particle-slurry flow in vertical pipes, Fluid Dynamics and Materials Processing, 17 (2) (2021) 413–426.
L. Zhao, T. Wang and W. Han, Study on velocity distribution of large particle in vertical slurry pipeline, Measurement and Control, 52 (9–10) (2019) 1282–1288.
Z. Yue, G. Zhao, M. Liu and L. Xiao, Experimental and numerical methods for obtaining flow field formed by hydraulic nodule pick-up devices, International Journal of Offshore and Polar Engineering, 31 (3) (2021) 378–381.
Z. Yue, G. Zhao, L. Xiao and M. Liu, Comparative study on collection performance of three nodule collection methods in seawater and sediment-seawater mixture, Applied Ocean Research, 110 (2021) 102606.
H. Cheng, Y. X. Chen and H. Xiong, Experimental and numerical study on the efficiency of hydraulic collection utilizing two different suction inlets, 5th International Conference on Advances in Energy Resources and Environment Engineering (ICAESEE), Chongqing, China (2019).
Y. Li and J. He, Numerical simulation of solid-liquid two-phase flow of the gathering process of seafloor massive sulfide, Journal of Central South University (Science and Technology), 53 (2) (2022) 461–470.
G. Zhao, L. Xiao, Z. Yue, M. Liu, T. Peng and W. Zhao, Performance characteristics of nodule pick-up device based on spiral flow principle for deep-sea hydraulic collection, Ocean Engineering, 226 (2021) 108818.
C. Kloss, C. Goniva, A. Hager, S. Amberger and S. Pirker, Models, algorithms and validation for opensource DEM and CFD-DEM, Progress in Computational Fluid Dynamics, 12 (2–3) (2012) 140–152.
P. A. Cundall and O. D. Strack, A discrete numerical model for granular assemblies, Geotechnique, 29 (1) (1979) 47–65.
Y. Wang, Y. Xia, X. Xiao, H. Xu, P. Chen and G. Zeng, Ballast flow characteristics of discharging pipeline in shield slurry system, Applied Sciences-Basel, 9 (24) (2019) 5402.
D. Yang, Y. Xia, D. Wu, P. Chen, G. Zeng and X. Zhao, Numerical investigation of pipeline transport characteristics of slurry shield under gravel stratum, Tunnelling and Underground Space Technology, 71 (2018) 223–230.
K. J. Hanley, K. Cronin and E. P. Byrne, Dispersion in particle velocity resulting from random motion through a spatially-varying fluid velocity field in a pipe, Powder Technology, 245 (2013) 255–264.
M. Yang, Y. Xia, L. Lin, S. Qiao and Z. Ji, Optimal design for buckets layout based on muck removal analysis of TBM cutter-head, Journal of Central South University, 27 (6) (2020) 1729–1741.
Acknowledgments
This work is supported by the special fund of the National Key R&D Program of China (Grant No. 2022YFC3802301), the Construction of Innovative Provinces in Hunan Province (No. 2019GK1010), the Independent Exploration and Innovation Project of Central South University (No. 2020zzts100), and the project of the State Key Laboratory of Precision Manufacturing for Extreme Service Performance (No. ZZYJKT2021-15).
Author information
Authors and Affiliations
Corresponding authors
Additional information
Xuemeng Xiao is a doctoral student in mechanical engineering in Central South University, Changsha, China. Her research interests include slurry shield circulation systems and flow field flow problems in slurry shield excavation.
Rights and permissions
About this article
Cite this article
Jiang, H., Lin, L., Wen, Z. et al. Structure effect of a suction pipe on slag-discharging performance in a shaft boring machine. J Mech Sci Technol 37, 4647–4659 (2023). https://doi.org/10.1007/s12206-023-0820-z
Received:
Revised:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s12206-023-0820-z