Study on “triangle” water-inrush mode of strong water-guide collapse column

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• 作者：Zhen-hua Li 李振华 ; Guo-rui Feng 冯国瑞…
• 关键词：Key wordsstrong water ; guide collapse column ; “triangle” water ; inrush mode ; similar simulation ; numerical simulation ; seepage
• 刊名：Journal of Central South University
• 出版年：2016
• 出版时间：September 2016
• 年：2016
• 卷：23
• 期：9
• 页码：2402-2409
• 全文大小：1,205 KB
• 刊物类别：Engineering
• 刊物主题：Engineering, general
  Metallic Materials
  Chinese Library of Science
  
• 出版者：Central South University, co-published with Springer
• ISSN：2227-5223
• 卷排序：23

文摘

The water-inrush mechanism of strong water-guide collapse column in coal seam is studied based on the establishment of geological and mathematical models of “triangle” water-inrush mode. The geological background of Shuangliu mine is considered a prototype, similar simulation tests are adopted to analyze the water-inrush rules under this model, and the formation of water-guide channel and water-inrush process is investigated by examining the changes in rock resistivity. This work also uses the coupled cloud image derived from numerical simulation software to verify the results of simulation test. Results show that the numerical simulation of “triangle” water-inrush mode is consistent with the similar simulation. The “triangle” seepage area, which is located at the bottom of collapse columns and is connected to aquifer, is caused by the altered seepage direction and strengthened seepage actions after the overlapping of hydraulic transverse seepage in collapse column and hydraulic vertical seepage flow in aquifer. Under “triangle” water-inrush model, water-guide channel is formed by the communication between plastic failure zone of working face baseplate and “triangular” seepage area. Accordingly, the threatening water-inrush distance between working face and collapse column increases by 20 m compared with that of theoretical calculation.