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Tytuł pozycji:

Karst Water Pressure’s Varying Rule and Its Response to Overlying Strata Movement in Coal Mine

Tytuł :
Karst Water Pressure’s Varying Rule and Its Response to Overlying Strata Movement in Coal Mine
Autorzy :
Jian Hao
Hua Bian
Anfa Chen
Jiahui Lin
Dongjing Xu
Pokaż więcej
Temat :
Engineering (General). Civil engineering (General)
TA1-2040
Źródło :
Advances in Civil Engineering, Vol 2020 (2020)
Wydawca :
Hindawi Limited, 2020.
Rok publikacji :
2020
Kolekcja :
LCC:Engineering (General). Civil engineering (General)
Typ dokumentu :
article
Opis pliku :
electronic resource
Język :
English
ISSN :
1687-8086
1687-8094
Relacje :
https://doaj.org/toc/1687-8086; https://doaj.org/toc/1687-8094
DOI :
10.1155/2020/8848924
Dostęp URL :
https://doaj.org/article/503a40a3d4cb41c694b27b4352ef0dd5
Numer akcesji :
edsdoj.503a40a3d4cb41c694b27b4352ef0dd5
Czasopismo naukowe
Karst water is widespread throughout China and is heavily influenced by complex geological conditions, and floor inrush of karst waters associated with coal seams is the second most common coal mine disaster in China. Due to the limitation of precision and cost of geophysical exploration technology, the volume and pressure of karst water are challenging to measure, especially during the mining process. Therefore, predicting karst pressure’s response to mining is critical for determining the mechanism of water inrush. Here, closed karst water pressure (CKWP) response to mining was studied in an innovative physical simulation experiment. In the simulation experiment, a capsule and a pipe were designed to reflect CKWP and the water level. In the experiment, the vertical stress and karst water level were monitored throughout the process of an advancing coal panel. Monitoring results show that the range of the abutment pressure was about 40 cm, and the peak coefficient value was about 2. When the working face is far away from the water capsule, the stress and water column near the water capsule have no obvious change. With the working face 10 cm from the water capsule, the stress and water column height increased significantly. When the working face was right above the water capsule, the stress and water column rose sharply and reached the maximum value. When the working face advanced beyond the water capsule, the stress and water column height declined. Through establishing a structural mechanics model, the karst water system underneath the working face is assumed to be a hydraulic press. Accordingly, the compressed area was assumed to be a piston. The karst water pressure increases sharply, while the piston is compressed, increasing water inrush risk. This discovery may help determine the water inrush mechanism from a novel point of view.

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