| Autor: |
Yang Xiaojie, Wang Jiamin, Zhang Min, Zhang Xiulian |
| Jazyk: |
English<br />Chinese |
| Rok vydání: |
2017 |
| Předmět: |
|
| Zdroj: |
矿业科学学报, Vol 2, Iss 5, Pp 432-438 (2017) |
| Druh dokumentu: |
article |
| ISSN: |
2096-2193 |
| DOI: |
10.19606/j.cnki.jmst.2017.05.004 |
| Popis: |
With the deepening of coal mining, engineering support problems become more complex.In order to study the interaction between rock and water on the deformation and failure of roadway, the deep soft rock roadway of Tiefa Daqiang coal mine was chosen as the engineering sample, and a series of water absorption tests and strength softening tests on rock samples with different water content were conducted.The experimental results showed that water absorption processes were divided into two stages:deceleration phase and constant phase and the water absorbing capacity of rock with a certain pressure is larger than the one without pressure. The results of strength softening showed that the uniaxial compressive strength of sandstone and mudstone has a negative relationship with water absorption time and water content.The initial intensity of water absorption decreased rapidly, and the surrounding rock should be timely closed and remove moisture after excavation, because it can prevent the sudden declining in the strength of the surrounding rock which may cause the floor heave and large deformation.The results are of great significance to design, construction and safety of deep mining engineering. |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
|
