TITLE

Physical Simulation of High-Pressure Water Inrush Through the Floor of a Deep Mine

AUTHOR(S)
Sun, Wenbin; Zhang, Shichuan; Guo, Weijia; Liu, Weitao
PUB. DATE
November 2017
SOURCE
Mine Water & the Environment;Nov2017, Vol. 36 Issue 4, p542
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
When mining at great depth, high-pressure karstic water inrush can pose a serious threat. We used physical simulations to investigate channel inception, evolution, and catastrophic flooding. Using newly developed coupled solid-liquid materials and physical simulations of high-pressure water intrusion, a laboratory test was carried out that reproduced the spatial and temporal characteristics of channel formation and crack generation, extension, connection, and failure. Floor failure features caused by the effects of mining and confined water were analyzed, and the formation and evolution of catastrophic flooding were investigated. The results showed that the evolution of a water-inrush channel can be divided into three stages: floor crack development, water channel initiation, and channel evolution. Extrapolating the simulation results to a real-world example, a floor fracture formed when the working face advanced to 45 m, and a water-inrush channel formed when the push distance of the working surface was about 70 m. Thereafter, the point of water eruption widened, water flow increased, and the main cracks in the floor rock mass showed obvious changes. The crack in the lower interface was angled 56° upward, and finally a water eruption point formed in the middle of the mined cavity. These results provide theoretical support for the prediction of water inrush into deep coal mines.
ACCESSION #
126260421

 

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