| Issue |
E3S Web Conf.
Volume 248, 2021
2021 3rd International Conference on Civil Architecture and Energy Science (CAES 2021)
|
|
|---|---|---|
| Article Number | 03074 | |
| Number of page(s) | 4 | |
| Section | Research on Civil Water Conservancy Engineering and Urban Architecture | |
| DOI | https://doi.org/10.1051/e3sconf/202124803074 | |
| Published online | 12 April 2021 | |
FLAC3D simulation of combined support effect under different prestress parameters of deep soft rock roadway
1 College of Energy and Mining Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong Province, China
2 Shandong Ding ‘an Testing Technology Co., Ltd, Jinan 250031, Shandong Province, China
* Corresponding author: E-mail: 980652377@qq.com
In coal mining, as the mining depth increases, a complex mechanical environment of “high ground stress”, “high ground temperature”, “high karst water pressure”, and “mining disturbance”, namely “three highs and one disturbance” appears. Many roadways have the characteristics of soft rock roadways with large deformation, large ground pressure, difficult support, and high support cost, which brings severe challenges to the safe and efficient production of coal mines. Therefore, it is very important to explore the support technology and support parameters of deep soft rock roadways. In this paper, numerical simulation is used to study the influence of different prestress on the displacement, axial force and vertical stress of the surrounding rock of the roadway in the joint support of deep soft rock roadway. The results show that in the simulation of prestressing 20KN, 40KN, 60KN, and supporting method of bolt and anchor cable combined support, the comprehensive support effect of 60KN prestressed bolt + anchor cable is the best.
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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