doi:10.16186/j.cnki.1673-9787.2020040098

Received:2020/04/26

Revised:2020/07/09

Published:2022/01/10

Study on the mechanism of floor breakage after water-inrush from the hidden collapse column based on the plate and shell theory

LIU Gang 1, ZHANG Boyang 1, WU Linlin 2

1.School of Civil Engineering， Henan Polytechnic University， Jiaozuo 454000 ， Henan， China， China；2.Henan United Architecture Design Co.， Ltd. ， Zhengzhou  450000 ， Henan， China

Abstract: Based on the theory of plate and shell and the theory of fracture mechanics，the fracture model of the floor after water-inrush from the hidden collapse column was established． The crack propagation mechanism of the base plate with cracks was studied，and the internal stress distribution and the crack stress intensity factor of the floor were obtained． The results showed that the stress in the bottom plate was related negatively to the thickness of the bottom plate，and positively to the position of the middle surface，radius and water pressure． With the increase of the thickness and the decrease of the crack length and the radius of the bottom plate，the crack was more difficult to propagate． Based on the theoretical results，the floor breaking mechanism of “2· 18”water inrush accident in Zhangji coal mine was analyzed，and the analysis results were consistent with the scene．

Key words:collapse column;coal seam floor;water-inrush;plate and shell theory;the crack

 基于板壳理论的隐伏陷落柱突水煤层底板破断机理研究_刘港.pdf