The Research Of Theory On The Broad High Stress Frangible Roadway Support

By using theoretical analysis , numerical value imitation and finite element imitation, this thesis systematically studies the theory of bolt action, and discusses the application feasibility of different kinds of bolt and different kinds of section shape in roadway in some specific geological conditions.hi the face of the incompact frangible factual engineering geological condition of Ma Ti Gou Coal Mine, on the basis of result we have got by analyzing, this thesis bring forward some novel supporting methods such as drum shape section three centers arch section ragged bolt and so on, and these methods are used in some roadways which are hard to support. These methods solve the problems which have trouble the mine for long time that the effect of original methods is pool and the cost of original methods is great. The thesis models the characteristics of different shapes of roadway sections, and demonstrates the feasibility of these new sections.The thesis tracks the whole process from support design , support construction , observation and analysis of roadway displacement support complete to economic benefit analysis. The author have used plentiful data and theories to demonstrate that bolt and shotcrete supporting technology is a kind of active support method compared to those methods such as timber bracket , steel bracket, and this method can enhance the bearing ability of load of the rock and it has perfect physics mechanics performance.