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《Coal Science and Technology》 2012-01
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Application of Large Diameter High Pre-Stressed Powerful Anchor to Mine Roadway Reinforcement

YU Yi-hao1,MENG Bo2,LI Ming-ming3(1.No.103 Exploration Team,North-East China Coalfield Geological Bureau,Liaoyang 111000,China;2.School of Mechanics and Architecture Engineering,China University of Mining and Technology,Xuzhou 221008,China;3.Geophysical Exploration Team, North-East China Coalfield Geological Bureau,Shenyang 110101,China)  
In order to solve the repeated deformation and failure problems of the ingate in the mine auxiliary shaft of a mine,the project geological information and the deformation repair conditions of the ingate were applied to the analysis on the deformation and failure mechanism of the ingate.The basic cause of the ingate deformation and failure obtained was the conclusion of the low original support resistance.The directional drilling technology was applied to make through between the ingate,pumping chamber and substation.There were 186 large diameter pre-stressed grouting and anchor binds applied to the construction and the surrounding pressure of the rock pillar between the ingate,pimping chamber and the substation was highly improved.With 45 days continued observations,the deformation of the mine roadway became stable,the convergence of the two sidewalls was 30 mm,the roof subsidence was 8 mm and the floor heave was 12 mm.The practices showed that the large diameter and high pre-tension powerful anchor could provide powerful support resistance,could effectively improve the surrounding pressure of the surrounding rock and could keep the stability of the mine roadway.
【CateGory Index】: TD353
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【Citations】
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