Based on water inrush accident of 1841 working face of Desheng Coal Mine in Wu'an, Hebei province, China, an evaluation model of hydrodynamic characteristics of the project is set up and simulated using Matlab. It...Based on water inrush accident of 1841 working face of Desheng Coal Mine in Wu'an, Hebei province, China, an evaluation model of hydrodynamic characteristics of the project is set up and simulated using Matlab. It is assumed that the pipe flow would transform into seepage flow when the aggregates are plugged into the water inrush channel and the seepage flow would disappear along with grouting process. The simulation results show that the flow velocity will increase with an increase in height of aggregates accumulation body during the aggregates filling process; the maximum seepage velocity occurs on the top of plugging zone; and the water flow decreases with increasing plugging height of water inrush channel. Finally, the field construction results show that the water inrush channel can be plugged effectively by the compacted body prepared with aggregate and cement slurry.展开更多
Brigitta Zeumer,an old friend of the Chinese people and a famous painter,died not long ago in Cologne,Germany.I was shocked at the news,since not long before,she had written to me that she was feeling better and plann...Brigitta Zeumer,an old friend of the Chinese people and a famous painter,died not long ago in Cologne,Germany.I was shocked at the news,since not long before,she had written to me that she was feeling better and planned to visit China to experience its changes and development and renew old friendships.I planned a warm reception and a series of展开更多
基金Financial support for this work, provided by the National Natural Science Foundation of China (Nos. 41072031, 40172119)the Natural Science Foundation of Hebei Province of China(No. D2012402008)
文摘Based on water inrush accident of 1841 working face of Desheng Coal Mine in Wu'an, Hebei province, China, an evaluation model of hydrodynamic characteristics of the project is set up and simulated using Matlab. It is assumed that the pipe flow would transform into seepage flow when the aggregates are plugged into the water inrush channel and the seepage flow would disappear along with grouting process. The simulation results show that the flow velocity will increase with an increase in height of aggregates accumulation body during the aggregates filling process; the maximum seepage velocity occurs on the top of plugging zone; and the water flow decreases with increasing plugging height of water inrush channel. Finally, the field construction results show that the water inrush channel can be plugged effectively by the compacted body prepared with aggregate and cement slurry.
文摘Brigitta Zeumer,an old friend of the Chinese people and a famous painter,died not long ago in Cologne,Germany.I was shocked at the news,since not long before,she had written to me that she was feeling better and planned to visit China to experience its changes and development and renew old friendships.I planned a warm reception and a series of
