Study on Main Control Factors for Karst Collapse Column Water Inrush in Coal Mines

It is of great significance to study the main control factors of erosion and water inrush from the confined water guiding column of coal mine floor to reveal the water inrush mechanism of the Karst collapse column and to guide its water inrush prevention. The mechanical model of erosion and water in...

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Bibliographic Details
Published inMei kuang an quan Vol. 51; no. 12; pp. 232 - 236
Main Author SHI Hongmiao, YAO Banghua, WEN Zhihui, MA Qingqing
Format Journal Article
LanguageChinese
Published Editorial Office of Safety in Coal Mines 01.12.2020
Subjects
erosion effect
karst collapse column
main control factor
numerical simulation
water inrush
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Summary:It is of great significance to study the main control factors of erosion and water inrush from the confined water guiding column of coal mine floor to reveal the water inrush mechanism of the Karst collapse column and to guide its water inrush prevention. The mechanical model of erosion and water inrush of collapse column is established, the multi-physics coupling software COMSOL Multiphysics is used to numeralize the model. The non-uniform distribution characteristics of the cracks in the collapse column are considered to perform the simulation research for the whole process of water inrush of collapse column under erosion action, and the influence of water pressure, initial fracture distribution and fracture development degree on water inrush of collapse column are analyzed. The results show that the greater the aquifer water pressure and the initial fissure opening is, the faster the water inflow from the collapse column increases and the greater the risk of water inrush is. The initial fracture distributi
ISSN:1003-496X
DOI:10.13347/j.cnki.mkaq.2020.12.048