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ARTICLE
Study on stress characteristics of high-porosity coal gangue subgrade during filling process
1
Shandong Transportation Research Institute, Jinan, China
2
Ningxia Communications Construction Group Co., Ltd., Ningxia, China
Submission date: 2023-03-01
Final revision date: 2023-05-20
Acceptance date: 2023-05-23
Online publication date: 2023-07-24
Publication date: 2023-07-31
Journal of Theoretical and Applied Mechanics 2023;61(3):625-641
KEYWORDS
TOPICS
ABSTRACT
By analyzing geological conditions of a coal gangue filling roadbed, stress characteristics and
settlement changes during the filling process of the coal gangue roadbed are simulated. The
following conclusions are drawn: (1) As height of the coal gangue filling increases, the stress
and settlement of each part will also increase. (2) During the filling process, the vertical
stress acts as the first principal stress, and the stress and strain at the centerline of the
roadbed are 10 times that of the roadbed. (3) The final stable value of uneven settlement of
the coal gangue roadbed is 18.85mm. (4) The monitoring results indicate that the settlement
of the coal gangue roadbed is stable, and the settlement amount is small ensuring safety of
the roadbed.
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