期刊
MINERALS
卷 6, 期 3, 页码 -出版社
MDPI
DOI: 10.3390/min6030078
关键词
CT; coal microscopic structure model; pores and throats; visualization of three-dimensional (3D) data cube; seepage simulation of water-injection
资金
- State Key Program of National Natural Science of China [U1261205]
- National Natural Science Foundation of China [51474139]
- SDUST Research Fund [2014JQJH106]
- China Postdoctoral Science Foundation [2016T90642]
- China Postdoctoral Science Foundation Funded Project [2015M570602]
- Open Fund of the Key Laboratory of Coal Mine Gas and Fire Prevention and Control of Ministry of Education [2015KJZX02]
- Science and Technology Project of Huangdao District, Qingdao [2014-1-30]
- Qingdao Postdoctoral Applied Research Project [2015194]
- Open Fund of the Key Laboratory of Safety and High-Efficiency Coal Mining of Ministry of Education [JYBSYS2014105]
- Key Technology Projects of Chinese State Administration of Work Safety for Preventing Major Safety Production Accidents [Shandong-0083-2015AQ]
This paper used the X-ray three-dimensional (3D) microscope and acquired, through CT scanning, the 3D data of the long-frame coal sample from the Daliuta Coal Mine. Then, the 3D datacube reconstructed from the coal's CT scanning data was visualized with the use of Avizo, an advanced visualization software (FEI, Hillsboro, OR, USA). By means of a gray-scale segmentation technique, the model of the coal's micro-pore structure was extracted from the object region, and the precise characterization was then conducted. Finally, the numerical simulation on the water seepage characteristics in the coal micro-pores model under the pressure of 3 MPa was performed on the CFX platform. Results show that the seepage of low-pressure water exhibited preference to the channels with large pore radii, short paths, and short distance from the outlet. The seepage pressure of low-pressure water decreased gradually along the seepage direction, while the seepage velocity of low-pressure water decreased gradually along the direction from the pore center to the wall. Regarding the single-channel seepage behaviors, the seepage velocity and mass flow rate of water seepage in the X direction were the largest, followed by the values of the seepage in the Y direction, and the seepage velocity and mass flow rate of water seepage in the Z direction were the smallest. Compared with the results in single-channel seepage, the dual-channel seepage in the direction of (X + Y) and the multi-channel seepage in the direction of (X + Y + Z) exhibited significant increases in the overall seepage velocity. The present study extends the application of 3D CT scanning data and provides a new idea and approach for exploring the seepage rules in coal micro-pore structures.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据