Technical gazette, Vol. 27 No. 2, 2020.
Original scientific paper
https://doi.org/10.17559/TV-20180305040724
Numerical Simulation Analysis of Water Injection Seepage Law in Micro Porous Structure of Coal
Gang Zhou
; Shandong University of Science and Technology, 579 Qianwangang Road, Economic & Technical Development Zone, Qingdao 266590, China; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science a
Lei Qiu
; College of Mining and Safety Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Economic & Technical Development Zone, Qingdao 266590, China
Wen-Zheng Zhang
; College of Mining and Safety Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Economic & Technical Development Zone, Qingdao 266590, China
Jiao Xue
; State Key Laboratory of Mining Disaster Prevention and Control Co-founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, 579 Qianwangang Road, Economic & Technical Development Zone, Qingdao
Ming-Guang Zhang
; College of Mining and Safety Engineering, Shandong University of Science and Technology, 579 Qianwangang Road, Economic & Technical Development Zone, Qingdao 266590, China
Abstract
In this paper, a nano Voxel X-ray 3D microscope is used to scan the long flame coal samples and to reconstruct the 3D pore structure by the use of microscopic computed tomography. With image segmentation technique, a model of micro-pore structure of coal is obtained from the reconstructed coal. With different planes selected as seepage inlets, a numerical simulation of low-pressure water seepage is conducted. Studies show that water pressure gradually decreases along the direction of water seepage and reaches the maximum at the pore-pipes with good connectivity near the inlet. Due to the difference between the structure and development direction of pores in the three dimensions, there is an optimal seepage outlet that is most appropriately corresponding to each seepage inlet. When different planes are selected as seepage inlets, the velocity of each seepage outlet is positively correlated with the seepage mass flow rate at the outlet.
Keywords
micro CT; micro-pore structure of coal; rule of seepage; visualization
Hrčak ID:
236795
URI
Publication date:
15.4.2020.
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